Modernization of the VAZ-2106 car: installation and adjustment of the Solex carburetor

Published:

21.03.2017

Initially, the VAZ-2106 car left the factory with an Ozone carburetor. However, this unit has so many shortcomings that with the advent of the more modern Solex carburetor, many owners of classic Zhiguli cars could not resist the opportunity to improve the engine of their car. Among most of them there was an opinion that this would improve the technical characteristics of the car, while others believed that this decision would have a detrimental effect on the stability of the engine. In this article we will look at what advantages such a modernization has and, if any, how to install and adjust the Solex carburetor on a VAZ-2106 car with your own hands.

With the “native” carburetor, the engine of the “sixth” model had good throttle response. But there was also a significant drawback in the form of failures when trying to sharply increase the crankshaft speed. That is, as soon as the driver pressed the gas pedal, the engine first “choked” and only then began to gain momentum. The reason for this is the insufficient fuel level in the float chamber, which affected during intensive acceleration of the car. That is why the owners of the “sixes” wondered about the possibility of installing an alternative carburetor that could increase the engine’s throttle response with minimal losses. The choice fell on the Solex unit as the best option.

Initially, the six was equipped with an OZONE carburetor

Replacing the carburetor of a VAZ 2106 Zhiguli

Loosen the clamp and disconnect the corrugated warm air intake hose from the pipe.

Remove the air filter (see Replacing the air filter element).

Using a size 8 wrench, unscrew the four nuts securing the air filter housing to the carburetor. To avoid accidentally dropping them into the intake manifold, you can cover the carburetor with a clean rag.

Remove the air filter housing.

Loosen the clamp and remove the fuel supply hose.

Disconnect the tip from the solenoid valve outlet.

Using an “8” wrench, loosen the tightening of the bolt securing the sheath of the air damper drive cable.

. Use a slotted screwdriver to loosen the cable fastening screw, holding the nut with a “7” wrench.

. and remove the end of the cable from the holes.

Disconnect the crankcase gas suction hose.

Using a screwdriver with a wide blade, remove the rod from the throttle valve drive lever (see Adjusting the carburetor drive).

Disconnect the vacuum ignition timing regulator hose.

Remove the return spring.

. Using a 13mm wrench, unscrew the four carburetor mounting nuts.

Remove the carburetor from the engine.

We install a new (or washed, repaired and adjusted old) carburetor in the reverse order of removal. Be sure to replace the carburetor gasket with a new one.

ATTENTION! Do not use much force when tightening the carburetor mounting nuts. The soft metal mating surface of the carburetor body can be damaged.

Connecting the carburetor to the engine and other vehicle systems.

The first device we see connected to the carburetor is the air filter. The dimensions of the filter are such that it completely covers the carburetor. The filter housing is attached directly to the top of the carburetor using 4 nuts. A fuel hose is connected through a fitting located on the side of the carburetor, through which fuel is supplied from the tank using a fuel pump.

A hose is connected from the distributor (ignition system) to the Ozone. A vacuum is created in the carburetor, which rotates the contact plate in the distributor through this hose, thereby changing the ignition timing.

A wire is connected to the solenoid valve. Through it, voltage from the fuse box is supplied to the valve.

A thin cable is connected to the throttle control lever. This thrust increases the amount of produced fuel-combustible mixture, which is supplied to the engine combustion chamber. It is this thrust that acts when the driver presses the gas pedal in the cabin.

In the area of ​​the air inlet (which is blocked by a special flap), a so-called “choke” rod is connected. This device starts a cold engine: the flap allows less air into the carburetor, thus producing a rich mixture. The rod leads to the choke handle, located inside the car, at the bottom right of the steering column.

The intake manifold, which directs the air-fuel mixture directly into the cylinders, is connected to the carburetor by a short spring and two bolts.

Carburetor VAZ 2106

The carburetor is one of the most critical components in the fuel supply system to the engine of a VAZ 2106 car. It is responsible for creating the fuel-air mixture, which is necessary for the normal operation of the power unit.

Carburetor OZONE

A carburetor with the correct settings prepares a normal combustible mixture of gasoline and air (1:15). But during prolonged or intensive use, the factory settings are violated, as a result of which an enriched or lean fuel mixture constantly begins to flow into the engine. This immediately affects its operation and requires carburetor repair.

Symptoms of a problem

If the carburetor begins to produce a rich mixture, you will understand this by the following signs:

• Fuel consumption increases
• Loud exhaust is heard from the muffler and the smoke turns black

If the engine receives a lean mixture, you will understand this by the following sign:

Loud bangs are heard from under the hood.

In both cases, the engine heats up noticeably more, and its power is also lost.

If you encounter a similar problem, remember that it is a natural consequence of using the carburetor. Any element of the car requires care, regular inspection and maintenance. Therefore, the VAZ 2106 carburetor must be adjusted from time to time.

Before proceeding with the adjustment, you need to make sure that the cause of the breakdown is not the failure of any element inside the device. You need to disassemble it, wash it and clean it. And only after you are convinced that all components of the structure are in full working order, you can begin adjustment.

The easiest option is to send the car to a specialist. Carburetor technicians have a special tool - a gas analyzer. Using this device, you can achieve the most efficient system setup. However, the services of specialists in this profile are not cheap. You may want to do all the work yourself, using available materials. Next we will look at how to set up a carburetor step by step.

Replacing the Solex 21083 carburetor on a VAZ 2106

To carry out work on replacing the Solex 21083 carburetor, you need to prepare gasket material made of paronite, a fuel supply hose about 80 cm in length, a carburetor rocker and the Solex product itself. A set of motorist's locksmith supplies will be useful for the job.

Installing a Solex 21083 carburetor on a VAZ 2106:

1. We clean the power compartment to prevent contamination of the motor and power system.
2. We disconnect the cables and ties of the carburetor device, the fastenings of the fuel wires and hoses of the heating complex.
3. We remove the bracket holding the casing covering the throttle valve drive cable.
4. We clean the manifold platform for attaching the carburetor.
5. Apply a layer of sealing lubricant to prevent air from entering the system.
6. We place the gaskets in the following sequence: thin, then thick, then again thin gasket. A large cross-section gasket is used to remove heat and prevent heat transfer to the carburetor device.
7. We mount the Solex on the seat, removing the front part of the product for ease of operation.
8. We install the rocker on the side of the over-valve cylinder head cover.
9. We pull the cable from the throttle drive of the carburetor valve and set the required length of the cable and then connect it to the carburetor device.
10. We install the updated gasket and lock the front carburetor cover.
11. We connect the hoses of the heating and distribution ignition system.
12. Connect the tee to the fine fuel filter element and connect the return hose to the fuel system.
13. We connect the reverse valve to the “return” hose, and then connect it to the carburetor device.
14. We connect the return type spring to the axial element of the rocker, which is located on the cylinder head casing.
15. We mount an additional spring element for the throttle drive of the carburetor valve for the period of running-in of the product (if necessary).
16. Connect the idle air solenoid valve to the relay connector.
17. Restore the original position of the air filter housing and connect the gas outlet hose.
18. This completes the Solex installation.

It is important to choose the right model of Solex carburetor for the VAZ 2106, the price of which is quite reasonable for Russian car enthusiasts. It all depends on the size of the power plant

In some cases, it is advisable to install the Solex 21073 product, but you should know that when using such a modification of the carburetor, the dynamics of the vehicle improves, although fuel consumption also increases in direct proportion.

In a VAZ 2106 car, adjustment begins with correcting the fuel level in the float chambers. For all the different methods of arranging the “return” (directly into the fuel tank or tapping into the gas line in front of the pump), the following steps must be taken:

1. We place the vehicle on a level surface, start the engine, warm it up, test it at all speeds and turn off the power plant.
2. We remove the fuel hose from the carburetor device, and do this carefully so that fuel does not get into the chambers, because The float level will be incorrect.
3. We dismantle the front cover of the Solex together with the accelerator cable, after which we use a caliper to measure the distance from the fuel level to the cut of the product body (should be 24 mm in both chambers) with an error of 1 mm. Due to a possible system error in the vehicle horizon, you can take the arithmetic average value based on measurements in the carburetor chambers.
4. Based on the measurements taken, we bend the tongue of the float in the required direction, after which we check, after assembling the product, for the transfer of fuel from the chambers.
5. Next we adjust the idle speed.

This work is carried out on a power plant heated to operating temperature. The peculiarity is that the mixture quality regulator is equipped with a red arrow, and the mixture quantity regulator is equipped with a blue arrow. Otherwise, the adjustment is of a normal nature, only the value is set by the quantitative regulator to 9000 instead of 800 on previous models.

Installation procedure

The Solex carburetor is absolutely suitable for mounting on the VAZ 2106 engine. Since the device itself is different, you will need to purchase some additional parts in order for the installation to be successful and the engine to work properly. The parts list includes the following items:

• 2 paronite gaskets and 1 paper;
• 1 meter of hose for fuel supply;
• Carburetor, always with a slide;
• A set of keys, screwdrivers and other locksmith supplies.

Now, you can get to work. Before installing the Solex on a VAZ 2106, clean the area where the Ozone carburetor connects to the engine. This is done so that when removing, debris does not get into the engine. Next, disconnect all the hoses and cables.

Next, unscrew the fastenings and remove the “Ozone” from the engine. Before installing the carburetor from the VAZ 21083, clean the mounting location. Afterwards, apply sealant and lay the gasket. The gaskets should be in this order: thin, thick and thin.

When the seat is ready, disassemble the Solex into two parts. This will make it easier for you to install it. First of all, install the rocker from the carburetor VAZ 21083 to 2106, as this is the key element required to begin the installation. You can already install the Solex on it.

Now, connect all the cables and hoses. We start with the throttle cable. It must be set to the required length, which is enough to connect it. Next in line is the fuel system hose. Before installing it, it is worth considering that on the VAZ 21083 it is longer than on the 2106, so you will need a pre-prepared meter hose. Place one of its tips on the outlet of the fuel system, and the second on the inlet to the carburetor. Before putting on the second end, it is better to cut it so that it does not dangle freely in the engine compartment. Also, remember, the longer the hose, the more fuel it will contain, and therefore the weight. This can cause it to become disconnected and possibly even cause the engine to catch fire.

Connecting and setting up the rods

Next, we connect one end of the return flow to the fine filter, do not forget to install a valve in it. Place the other end on the carburetor. We put all the springs in their places (they do not need to be replaced with new ones). Once all the hoses and cables are in place, you will need to worry about the idle speed. To do this, install a solenoid valve.

The final touch is to put on the top part of the carburetor and tighten the fastening nuts. Now, your Solex is ready for use.

Which carburetor is better for VAZ 2106

Since carburetors of the SOLEKS and WEBER families were completely copied from foreign-made analogues, their reliability is beyond doubt. It is enough to regulate and clean these units every 60 thousand kilometers, and there will be no problems with the supply of fuel to the engine of your car.

But the most popular are the devices of the OZONE family. They need to be adjusted and cleaned twice as often. In addition, they have many different diaphragms, which often break. The most common breakdowns of melon units are incomplete opening of the second chamber and malfunction of the accelerator pump.

Do-it-yourself carburetor idle adjustment

To solve the problem of how to adjust the idle speed on a VAZ 2106, you need to stock up on a set of driver’s tools, although one screwdriver is enough for this technological operation. On the Internet you can watch the “VAZ 2106 idling” video clip about carrying out adjustment work to stabilize the idling speed of the vehicle.

To adjust the idle speed of the “six” carburetor, a number of preparatory conditions must be observed. These include:

1. The operation is carried out only on the motor that has reached operating temperature (about 90 degrees Celsius).
2. The clearances of the timing valves and ignition contacts (with a contact system) must correspond to the required dimensions.

When adjusting the idle speed of a VAZ 2106 carburetor on a cold engine, the required result cannot be achieved. If there is no idle speed, it will appear only if the correct adjustment conditions are met.

If the VAZ of the “sixth model” stalls at idle, then to find out how to adjust the idle speed, you need to use the following algorithm:

1. The process of adjusting the idle speed on a VAZ 2106 car is carried out using two screws for adjustment, the first is the quality screw, the second is the quantity of the mixture.
2. In accordance with the factory parameters, the quantitative adjusting screw is locked with a sealed limiter sleeve. To carry out adjustments and when there is no idle speed on the VAZ 2106, the seal is removed and adjustment work is carried out.
3. Using a high-quality screw, we achieve a value of 900 rpm, checking the value with the tachometer readings.
4. Using the quantity screw, we use a gas meter to set the carbon monoxide value in the range of 0.6-1.3 percent. The circular movement of the adjusting screw changes the number of rotations of the crankshaft of the power unit.
5. In this situation, we re-fix the required crankshaft speed parameters with the first screw. If everything is done correctly, then when you sharply press and lower the accelerator pedal, the rotation value should remain stable.
6. If all operations are performed correctly, there should be a smooth increase in engine speed and the unit should operate stably.

If the idle speed floats or the VAZ 2106 engine operates spasmodically, that is, jerkily and unevenly, then the unit settings need to be restored. Upon completion of the setup, the power plant should produce stable speed.

You need to know how to set the idle speed of the VAZ 2106 in order to adjust the carburetor. You can perform this procedure quite quickly with your own hands, if, of course, you have an idea of ​​what a carburetor consists of and the functions of its main components. But first things first, let's start with the saddest thing - the case when suddenly there is no idle speed and the engine starts to stall.

You'll be lucky if this happens close to home. But if you’re on the road, it’s not good enough. On my own behalf, I’ll add that several times I had to remove and disassemble the carburetor while standing on a narrow highway, shying away from passing trucks and highlighting it with a flashlight. A good habit is to take a thermos and a flashlight on the road.

Preparatory activities

If a motorist is interested in adjusting the Solex VAZ-2107 carburetor with his own hands, he must first carry out a number of preparatory steps.

Initially, you need to warm up the power unit to operating condition (temperature 85–90 degrees).

In the next step, you need to squeeze the handle of the air damper drive mechanism all the way; people simply call it “choke.” After this, the damper should be in a position in which the air channel is completely free, i.e., located in the direction of air movement.

Installing a Solex carburetor on a VAZ classic

This video tells you how to install it

…

Installing a Solex carburetor on a VAZ classic (2106) part 1

Today Nail Poroshin will tell and show the main nuances of the installation

53rd
Carburetor
for the Classic! Everyone...

If there is a tachometer, the device must be connected to the engine being turned off. Otherwise, if there is no unit, the item should be skipped. The positive side of the device should go to the ignition coil, and the negative side should go to the “ground” of the vehicle (body, engine or battery negative). Before connecting the device, you should read the operating instructions.

The last action should be to start the engine, turn on the high beam optics and the heating device.

The most common breakdowns

However, the most common devices are the OZONE family of devices. They need to be cleaned and adjusted twice as often. In addition, they have a lot of different diaphragms, which break every now and then. The most common breakdowns of these units are incomplete opening of the second chamber, as well as malfunctions of the accelerator pump.

1. Popping sound when you press the accelerator pedal, as if something is shooting into the carburetor.
2. Similar pops, but now it shoots into the muffler.
3. The idle speed is either too high or too low (floats).
4. The car thinks for a long time when driving on the highway. When you press the gas pedal all the way, it does not accelerate at all or accelerates too slowly.
5. When you shift into 2nd or 3rd gear and press the accelerator pedal, the car first slows down and then jerks forward with a sharp increase in speed.

The detonation problem may be associated with a violation of the ignition timing angle. In any case, you should first try to eliminate detonation by adjusting the carburetor. In 90% of cases this helps.

The symptom described in point 3 indicates the need to adjust the idle speed. The situation indicated in paragraph 4 indicates that camera drive 2 is faulty. Eliminated by replacing broken parts. The symptom described in paragraph 5 indicates a breakdown of the accelerator pump - the diaphragm or spring must be replaced.

Which Solex to choose

Units produced by Dimitrovgradsky differ mainly in the geometry of the jets. There is a difference in the diameters of the diffusers, as well as in the size and design of the air jets. The cam profile also differs.

However, without any unpleasant consequences or modifications, absolutely any Solex from the entire series can be installed on a car for which the carburetor was never made. Many models and modifications of these carburetors were produced - they were equipped with VAZ-08, 09, AZLK-21412, ZAZ-1102. There are “Solex” for VAZ-2104, 05, 07. This all means that absolutely any unit from the mentioned line can be installed on rear-wheel drive VAZs without modifications or almost without them.

The result of tuning depends on the choice of a particular Solex. But in any case, the engine’s traction will improve and the car will accelerate smoothly. To save money, it is worth choosing the Solex modification on the Tavria - this is DAAZ-2181. If you need increased acceleration dynamics, then select DAAZ-21073. It features diffusers of larger diameter. This carburetor was created for engines with a displacement of 1.7, and after installing this Solex on a classic, you should prepare for high fuel consumption.

Solex models 2108, 21083, 21051-30 are considered by motorists to be the golden mean. The units are capable of providing better dynamic characteristics and lower fuel consumption when comparing their characteristics with Ozone.

Carburetor 2106

The standard option used on the Six engine is the “Ozone” sample. This is a two-chamber carburetor, with a falling air flow, emulsion type. The technical characteristics of the engine, when running, produced 75 horsepower, and the maximum speed was 155 km/h. Acceleration time to hundreds is 16 seconds.

The engine response is good, but when you press the gas pedal sharply, the car first chokes and then starts to move. This was explained by the fact that in the Ozone float chamber, the fuel level was insufficient, and during sharp acceleration there was not enough of it.

VAZ 2106 car owners were racking their brains over the question of which carburetor is better to install so that the engine's throttle response increases, while having minimal losses. Most opinions agreed that installing a Solex with a VAZ 21083 would be the best option.

New or used?

You can buy a new Solex for a classic, but it is also possible to purchase a used carburetor. In the second case, it is necessary to carry out an inspection - thoroughly clean the channels, polish the diffusers. In addition, it is better to purchase and replace jets.

But at the same time, you should not buy modern products - it is better to ask your friends and acquaintances for those that were made in the USSR. Modern jets found in repair kits often do not correspond to the calibration dimensions.

In order for the diffuser to work effectively, burrs and protrusions are removed from its elements using a file. Such defects create air turbulence, and this does not have the best effect on filling the cylinders.

BRIEFLY ABOUT THE FEATURES AND DEVICE OF THE “SIX” CARBURETTOR UNIT

Before adjusting the carburetor on a VAZ 2106, it doesn’t hurt to know its design features. After 1980, Ozone and Solex began to be installed on Tolyatti cars. The purpose of the unit’s operation is to prepare a combustible mixture before feeding it into the car’s cylinders. Down to the subtleties, this is not a driving school, we will not disassemble the design, it is enough to familiarize yourself with the main components that ensure optimal operation of a carburetor internal combustion engine:

1. Fuel dosing system.
2. Mechanisms for controlling throttle valves and enriching the mixture.
3. Idle system.
4. Accelerator pump and econostat.
5. Float chamber.

A chamber with a float and a needle valve is responsible for the stability of the fuel level. Next, gasoline, flowing through the spray tube, enters the chamber, where it mixes with air from the inlet pipe. The amount of mixture is adjusted by the throttle valve, which is connected to the accelerator pedal.

Precise adjustment allows you to prepare the correct mixture of gasoline and air in a ratio of 1:15. During long-term operation of the car, the settings get lost and you have to think about how to adjust the carburetor on a VAZ 2106 on your own. The adjustment technology is the same for both Solex and Ozone.

WHEN IS ADJUSTMENT NEEDED?

Adjusting the carburetor unit is no more difficult than adjusting the clutch drive on a VAZ 2107, since it only involves adjusting the jets. In some cases, they need to be cleaned of resins and other contaminants; the presence of contaminants is felt by power dips in the process of accelerating. Many car owners claim that Ozone carburetors are not a very good option and recommend replacing them with Solex.

However, the signs that the device has begun to prepare an enriched mixture and needs to be adjusted are the same for both types of units:

1. Increased fuel consumption.
2. Frequent overheating of the motor.
3. Black smoke from the exhaust pipe and pops.
4. Loss of power.

The preparation of a lean mixture is characterized by the following characteristics:

• Popping sounds in the carburetor.
• Loss of power.
• Engine overheating.

Of course, you don’t always need to immediately grab a screwdriver and turn the adjusting screws - perhaps it’s something else. For example, when the idle speed floats, air may leak through the intake manifold gasket, or there may be a breakdown of the brake booster diaphragm. But even the reasons listed are not all the options, so specific recipes for eliminating certain problems cannot be given. The issue should be addressed comprehensively, taking into account the connection between vehicle systems.

Possible problems and troubleshooting

Unstable idle speed or engine stalls

• not adjusted XX;
• the jets and channels are clogged - clean or blow with air;
• Water has entered the carburetor - remove the liquid and drain the sediment from the tank.

The engine cannot be started

• clogging of fuel lines - blow out the pipes and rinse the tank;
• The carburetor filter is dirty - wash it;
• Fuel pump is clogged - wash the filter.

Weak engine power

• DZs do not open completely - adjust the damper drives;
• the channels and main jets are clogged - clean the carburetor;
• low fuel level in the PC - adjust the position of the float;
• the clearances in the valve assembly are broken - correct the clearances;

Increased consumption

• the air damper does not rise completely - adjust the air damper drives;
• damage or wear of the float - replace the failed part;
• clogged air channels and jets - clean the carburetor.

Carburetor adjustment: setting the fuel level

The level of fuel in the float chamber affects the composition of the mixture in any operating mode of the carburetor, the toxicity of exhaust gases, the dynamics of engine operation and fuel consumption. Work order:

Unscrew the carburetor cover mounting screws and install it in a vertical position. A prerequisite for its installation is light contact between the float tongue and the needle ball. Using a special gauge, measure the gap between the bottom surface of the float and the plane of the cover (taking into account the cardboard spacer)

It is important that the gap is 6.5+0.25 mm. If the gap size does not match, the value is corrected by bending the float tongue. Finally, check the float stroke, which should be 8.0+0.25 mm.

How to get the most benefit

It’s not enough to install Solex on a classic; to experience all the benefits, you also need to modernize the ignition system. Instead of the standard one, contactless ignition is installed. Any Solex is initially configured and designed to prepare a lean mixture. To ignite it effectively, a more powerful discharge is needed. A contact ignition system cannot produce such a discharge, but a contactless one can. Its coil can generate voltage up to 25 thousand volts. The spark plug gap will be no more than 0.8 mm.

How is a carburetor repaired and flushed?

Many problems can be eliminated by flushing the carburetor, but for it to be effective, the unit must be removed from the car. After which you will need to disassemble it to the required level so that you can gain access to absolutely all elements of the mechanism.

Parts of the carburetor body 2107-1107010 in the diagram: 1 - rod of the pneumatic drive of the second throttle valve; 2 — pneumatic drive housing; 3 - diaphragm; 4 — pneumatic drive cover; 5 — fuel jet of the transition system of the second chamber; 6 — fuel nozzle body; 7 — small diffuser of the second chamber; 8 — accelerator pump nozzle; 9 — screw valve of the accelerator pump; 10 — main air jet of the second chamber; 11 — emulsion tube of the second chamber; 12 — main air jet of the first chamber; 13 — emulsion tube of the first chamber; 14 — main fuel jet of the second chamber; 15 — main fuel jet of the first chamber; 16 — accelerator pump adjusting screw; 17 — fuel jet of the idle system; 18 — fuel nozzle body; 19 — return spring of the accelerator pump; 20 — accelerator pump diaphragm; 21 — accelerator pump cover; 22 — small diffuser of the first chamber; 23 — lever return spring; 24 — three-arm air damper control lever; 25 — connection rod with the throttle valve; 26 — throttle valve return spring bracket

Repair consists of the following steps:

• Dismantling the device.
• Flushing, which includes cleaning and purging of carbon deposits and adhering dirt.
• Replacement of faulty parts.

Important: You need to remove the carburetor if you are 100% sure that the problem is in the carburetor, because the problem in other components of the car’s fuel system is also possible

Where does carburetor repair on a VAZ 2106 car begin?

Do-it-yourself repair of a VAZ 2106 carburetor begins with its removal. To do this, you will need to remove the air filter, which will still have to be replaced with a new one, and dismantle its housing.

It is recommended to first seal the openings in the chambers with rags to prevent small objects from getting into them. After this, the hose going to the brake vacuum is removed from the pneumatic valve, the choke installation cable is unscrewed and the rod is removed from the gas pedal lever that controls the throttle valve.

If you have the latest Solex carburetor, then the wires from the throttle valve, air damper and economizer are disconnected, providing forced idle.

Next, remove the fuel supply and return hoses and the ventilation pipe. After disconnecting all suitable and supply elements, you can begin to remove the block itself. To do this, you need to unscrew the 4 fastening nuts and carefully remove the device from the studs. It is highly recommended to plug the hole in the collector with a soft rag.

Step-by-step instructions for removing the carburetor

For your convenience, I have compiled detailed step-by-step instructions for removing the carburetor from the photo:

Important to remember: Be sure to replace the gasket under the carburetor with a new one. To avoid air leaks

Spare parts included in the carburetor repair kit for the VAZ 2106:

• Trigger diaphragm
• Jet body
• Idle jet - 2 pcs.
• Main air jet - 2 pcs.
• Main fuel jet - 2 pcs.
• Needle valve assembly
• Accelerator pump diaphragm
• Filter element
• Carburetor cover gasket
• Starter gasket
• Return spring
• Accelerator pump diaphragm spring
• Idle speed screw (adjustment needle)
• Ring sealing
• For R/K 2105-10, 2105-20, 2106, 2107-10, 2107-20:
• Acceleration pump nozzle
• Spray Valve
• Sprayer gasket - 2 pcs.
• Screw M5x0.8x20
• Screw M4x0.7x15

What you might need

The first step is to purchase spare parts that will be needed during the installation of the Solex on a classic model VAZ:

• You should buy thin paronite gaskets. But they need to be made specifically for Solex. The holes in the gasket for diffusers differ from Webers and Ozones.
• Instead of two gaskets, you can buy one with two holes. It is placed between the carburetor and the getinax gasket. In addition, they take another one - with an oval hole. It is intended for installation between the manifold and the getinaks gasket.
• They also buy a return hose. Its length must be at least 80 centimeters. Otherwise, it will not reach the fuel line under the pump.

How does the Ozone carburetor work?

The VAZ 2106 “Ozone” carburetor is a two-chamber emulsion-type device with a falling flow. The first chamber is intended for the dosing system and enrichment device, in the second the mixture of fuel and air is created in the required ratio. What is the operation scheme of the Ozone carburetor?

The fuel pump directs fuel into the float chamber through a needle valve, which maintains the required level. Through the nozzles, the fuel enters the first and second chambers, and then into the emulsion wells, where it is mixed with air, also entering through the nozzles. The created mixture is supplied to the carburetor diffusers.

Immediately after the engine starts, the idle channel is closed by an electromagnetic valve, then at idle speed gasoline flows from the first chamber. As the fuel moves through the nozzle, it mixes with air. When the throttle valves open more (when you press the gas pedal), the resulting mixture goes into the carburetor float chambers, through the transition holes. Through the econostat, the mixture enters the atomizer, which directs it into the combustion chamber of the engine.

General view of the Ozone carburetor

Over the course of 30 years of production of “classic” rear-wheel drive VAZs, their design, unlike their appearance, has remained virtually unchanged. Therefore, car owners are constantly trying to modernize them, introducing new components and assemblies from foreign cars or more modern VAZs. Many, for example, are not satisfied with the operation of the Ozone or Weber carburetor, which do not provide good acceleration dynamics, uniform acceleration, low fuel consumption and low toxicity levels. At the same time, their “younger brother” Solex can do all this. This is why many people replace their original carburetor with a licensed “French” one. The Dimitrovgrad Automotive Aggregate Plant (DAAZ), under license from the French company Solex, produces about a dozen modifications of Solex carburetors for engines with different displacements. This carburetor model was originally created for front-wheel drive VAZ models, since “Weber” and “Ozone” installed on an engine transversely located in the engine compartment, in certain driving modes (during sharp acceleration, cornering, on steep climbs) over-leaned the fuel-air mixture . This happens due to unwanted movements of the float in the float chamber. Solexes do not have this drawback, since their float chamber is two-sectional, i.e. with paired floats that move in a plane perpendicular to the longitudinal axis of the car (and not parallel, like Ozone and Weber).

Solexes are divided into 4 modifications:

• eights (2181, 2108, 2183)
• 21051 for the classic 1.3l engine - a rarity
• 21053 for the classic 1.5L engine - can still be found, but not often
• 21073 for 1.7l (Niva)

The modifications differ from each other in the cross-sections of the diffusers (21/23, 23/23, 23/24, 24/24, respectively) In addition, the “chisel” Solexes have different profiles for the cams of the accelerator pump drive and the starting device. Inside the modifications, they differ only in the sizes of the jets.

The seating dimensions and drives are the same for all, it’s just that in “chisel” carburetors the “normal” drive is covered with a plastic patch for attaching the damper drive cable.

To install ANY of the listed carbs on a classic you need:

• thick (10-15mm) plastic gasket - heat insulating. I saw them in two thicknesses - approximately 8mm and 15mm. From the point of view of thermal insulation, the second one is better (tested), but not every classic can close the hood with it;
• paronite on the inlet pipeline; · cardboard for the carb itself;
• a piece of thin hose for antifreeze 80cm + 2 clamps;
• plugs for unused pipes. In the worst case (21073), there are 3 of them. I made them from pieces of a vacuum supply hose to the distributor;
• set of rods and adapters for gas drive. Sold in some stores;
• check valve;
• tee;
• choke chisel cable (ours is short).

To get the maximum benefit from replacing this main element of the power system, it makes sense to upgrade the ignition system by installing a contactless one. Solex carburetors are initially configured to create a lean mixture. For its effective ignition, a more powerful spark discharge must be created on the spark plug. This can only be achieved by a contactless ignition system, the coil of which produces a voltage of up to 25,000 V, and the interelectrode gap of the spark plugs is 0.7-0.8 mm. Let me remind you that in a contact-transistor ignition system the above characteristics have values ​​of 17000 V and 0.5-0.6 mm, respectively. The gap in the contact system can be increased, but this will cause accelerated failure of the bearing of the movable plate of the breaker, its contacts and the capacitor.

The installation itself does not cause any problems. All this must be done WITH the car COOL. I removed Ozone and the old gasket, put a paronite gasket, a thick plastic one on top of it, a cardboard one on top, and the Solex is placed on this sandwich. Do not tighten the nuts at first

A bracket from a set of rods and adapters is placed under the nuts closest to the engine. A two-arm lever is placed on it, which is removed from the bracket on the cylinder head cover.

The short thrust from the pedal is replaced by a long one. If necessary, it will have to be adjusted to length. Each person attaches the return spring as their imagination allows. The only better way to do this is closer to the pedal.

The suction cable is replaced with a chisel one.

To connect the heating of the throttle valves, remove the antifreeze hose from the intake manifold and put it (with a clamp) on the carb heating pipe, put the spare hose on the other end of the pipe and again on the intake manifold. If heating is not connected, then in cool, humid weather, due to throttling, frost may freeze on the edge of the damper and, as a result, unstable operation at idle.

The vacuum intake for the distributor is taken from the lower fitting on the right (along the direction of the car). The crankcase ventilation is connected to the fitting at the bottom of the carb, directed towards the cabin (lowest)

Before installation, I recommend setting (checking) the fuel level in the float chamber. To do this, unscrew the 5 screws of the carb cover, remove it, turn it over, collect the fallen cover fastening screws from the ground (if you find them) and check the gap to the gasket from the bottom point of the floats. It is in accordance with the manual d.b. 1mm. At the same time, I recommend checking the tightness of the needle valve (at least with your mouth). Replace the cover.

Again, before installation, I recommend checking (setting) the starting clearances of the air damper and throttle (approximately 2.5/1)

As a very desirable option, I recommend installing a fuel return line. Even if it’s not to the tank, but to the entrance to the gas pump, so be it.

I don’t recommend using plastic tees from glass washers - the plastic cracks, and it’s not water, but gasoline: We insert the tee into the gap in the gas hose up to the fuel pump, the hose with the valve is put on the corresponding fitting of the carb - then the hose going to the tee is put on the valve.

But it’s better, of course, to drag it into the tank!

Now for impressions and fine-tuning.

At first I set myself 21073. It seems that the secondary chamber does not open at all until you reach speed 120 - there is no need. Fuel consumption increased slightly (0.5 - 1l/100km). But there are practically no failures compared to Ozone and an excellent start has appeared. After selecting the jets, we managed to reduce the consumption somewhat (not dramatically). At the same time, slight (but not as large as Ozone) failures appeared.

Next, I tried (on a friend’s car) 21053 - there were no failures, the dynamics were good, the consumption remained almost unchanged compared to Ozone. They didn’t touch the jets - I drove it like that until I sold it.

Now I have 21083. The cam is accelerated. pump from 21073. I still think that this is optimal for a 1.5 liter engine. Excellent dynamics, but the consumption is too high (less, of course, than with 21073, but still :) - we will become poorer.

The common advantage of all Solexes is that the XX is more stable than that of the Ozones.

All Solexes “love” increased CO (0.7 or more). It can be less (it won’t stall), but it’s shaking, etc.

The disadvantage is overheating in traffic jams in the summer. To reduce this, in the summer I disconnect (unscrew) the throttle valve heating pipe.

Recommendations for setting up and fine-tuning Solex

The standard carburetor is fully operational and adjusted, but the car's dynamics are unsatisfactory. The simplest option to fix this is to install a DAAZ 21073 carburetor. Installation without changes is possible, but the first chamber prepares a lean mixture as standard. Because of this, when the first chamber is operating (when the throttle valve of the second chamber is closed), the engine does not provide sufficient thrust for intensive acceleration. The car will accelerate sluggishly in the first chamber and sharply increase the rate of acceleration when the second chamber is opened. The latter can create some difficulties when controlling traction on surfaces with low friction coefficients. The fact is that the car literally jumps forward when the second chamber is opened. True, there is another side to the coin - fuel efficiency. This is the main feature of the 21073 carburetor.

To fully realize the benefits of the increased diameter of the main diffuser of the first chamber, an increase in the throughput of the main fuel nozzle (hereinafter referred to as the GTJ) of the first chamber will help. The first option is a compromise between efficiency and traction capabilities, replacing the GTZ from 107.5 to 110. The intensity of acceleration in the first chamber will increase, but only slightly. The most optimal for the first chamber is GTZh 115. It is also possible to install GTZh 117.5, but the fuel consumption will increase slightly. It should be noted that installing a gas turbine engine with a throughput capacity of more than 117.5 leads to excessive enrichment of the mixture and, as a consequence, increased fuel consumption and (in most cases) deterioration in acceleration dynamics.

Compensating jets (hereinafter referred to as KJ), also known as air jets, affect the composition of the mixture with increasing vacuum in the main diffusers of the carburetor, which occurs with increasing engine speed. Up to medium speeds (~ 2500 rpm) they have little effect on the mixture composition, but with increasing speed their influence on the mixture composition increases. The arithmetic is simple: the lower the throughput of the fluid, the richer the mixture becomes as the engine speed increases. Therefore, when using GTZh with a throughput of 107.5 and 110, it is advisable to slightly enrich the mixture using KZH with a small throughput: 145, 150, 155. When using GTZH 115, you can use KZH both 155 and 165. Well, when using GTZH 117.5 it is better to put QOL 165.

All of the above applied to the jets of the first chamber of the DAAZ 21073 carburetor. The second chamber is a little easier. You can leave everything as is (GTZh 115, KZh 135), or you can install GTZh 120. The latter will slightly affect fuel consumption, but will improve the acceleration dynamics of the car. It should also be noted that it is not advisable to put maximum GTZ in both chambers. The best effect can be achieved with the maximum permissible enrichment of only one carburetor chamber. For example, with a moderate GTZ in the first chamber (107.5 or 110), it makes sense to enrich the second chamber by installing a GTZ 120. With this ratio, the first chamber will be moderately economical with acceptable acceleration dynamics, and the second chamber will compensate for the lean mixture when both throttle valves are fully open .

There are a number of other features associated with the operation of Solex carburetors. We will try to talk about some of them below.

The engine does not maintain stable idle speed. Or it is not possible to establish normal idle speed (800-1400 rpm depending on the camshaft), which is important if a camshaft with wide valve timing is installed.

• The idle mixture is too lean. The mixture quality screw is turned more than necessary. Solved by adjusting CO within 2%.
• There is an air leak after the throttle valve. It is necessary to check the mating plane of the carburetor, the tightness of the vacuum booster pipe and its seals, the tightness of the intake manifold and the gaskets between it and the cylinder head.

The engine stalls after releasing the gas.

• If both of the previous points are met, then it is necessary to replace the XX jet with a jet with a higher throughput. And also check the operation of the EPHH control unit.

Adjusting the drive

1. Checking the length between the tips. The required size is 80 millimeters.
2. If you deviate from this size, remove one tip.
3. Loosen its lock nut and by rotating adjust the distance to the desired size.
4. Tighten the nut and return the rod.
5. You need to check the adjustment. To do this, our assistant presses the gas pedal. We observe the throttle valve to see if it has opened completely.
6. If not, then you need to remove the tip from the lever and reduce the length of the rod.
7. Now you need to see what position the damper is in when the gas pedal is released: does it close completely. If not, the pull needs to be lengthened a little.
8. Next we work with the air damper. We weaken its drive. In the cabin, we completely recess the damper.
9. Press the three-arm lever so that the flap opens all the way. In this position, tighten the locking screw.
10. Checking the adjustment. To do this, we completely close and open the door from the passenger compartment again. If the damper has not opened completely, we carry out the adjustment again. If the outcome is positive, fully tighten the screw.

Types of carburetors for VAZ 2106

On the assembly line, five types of carburetors were installed on the “sixes”:

• DAAZ 2106-1107010. Mounted with 1.6-liter internal combustion engines on vehicles manufactured before 1980.
• DAAZ 2103-1107010 "WEBER". Installed with 1.5-liter engines on cars manufactured before 1980.
• DAAZ 2105-1107010-20 “OZONE”. Mounted with 1.1-1.3-liter internal combustion engines on cars produced in 1980-1991.
• DAAZ 2107-1107010-20 “OZONE”. Mounted with 1.5-1.6-liter internal combustion engines on cars produced in 1980-1991.
• DAAZ 21053-1107010 "SOLEX". Installed on all cars from 1991 to the end of the 90s.

The first two types of carburetors can be distinguished from other units by the absence of a pipe - a thin black or yellow hose running from the carburetor to the distributor - the ignition timing vacuum corrector hose is put on it.

You can distinguish “OZONE” from other types of devices by the “flying saucer” - a pneumatic drive for opening the second chamber. If there is no connection for the vacuum corrector hose, but there is a “flying saucer”, this is a DAAZ 2107-1107010-10 carburetor device. This unit is quite rare; it was installed only at service stations to replace the first two types of devices after they broke down.

The design of the VAZ 2106 carburetor

High-quality independent maintenance of any vehicle system requires a detailed study of the components and mechanisms responsible for its operation.

Before adjusting the carburetor on the VAZ 2106, you need to consider the main units:

• System for supplying and dosing the combustible mixture;
• Control of mixture enrichment flaps, throttle position;
• The structure of the float chamber and its main purpose;
• Operation of the accelerator pump and idle mechanisms.

View of the carburetor from the throttle valve drive side: 1 - air damper; 2 — starting device; 3 — air damper control lever; 4 - telescopic rod; 5 — lever for driving the throttle valve of the primary chamber; 6 - lever that limits the opening of the throttle valve of the secondary chamber; 7 - return spring; 8 - rod connecting the throttle valve of the primary chamber with the air damper control lever; 9 — pneumatic drive rod; 10 - pneumatic drive.

The process occurs by filling the float chamber with fuel, which must have a stable level. The fuel is transferred to the spray mechanism, where, in turn, it is mixed with air in proportions of 1 to 15, the quality of the mixture is regulated by the throttle valve.

Preparing to adjust the carburetor

Car repair and maintenance requires prepared tools and space.

Setting up the carburetor of the six is ​​no exception; for fast, competent work you need to carry out the following steps:

1. Before work, the car is placed on a flat surface, a place is prepared for disassembling components in the form of a table or a clean area. A container for washing and clean rags will definitely be needed.
2. Prepare a set of keys and screwdrivers; without tools, it will not be possible to carry out the work.
3. Purchase a repair kit from an auto parts store that contains all the O-rings, gaskets and mechanisms.
4. Disassembly and adjustment of the VAZ 2106 carburetor occurs after completing the tool and the necessary materials.

Repairing a faulty device

The procedure for dismantling the carburetor using the example of OZONE.

That's it. The collector must be covered with a cloth. From the removed device, you can unscrew the pneumatic drive of the second chamber and the accelerator pump cover. After this, the faulty parts should be replaced and the breakdowns described above in paragraphs 4 and 5 should be repaired.

If you don’t know how to clean a carburetor, we attach instructions from specialists.

Sources

• https://avtovx.ru/karburator/soleks-na-vaz-2106-178/
• https://expertvaz.ru/2106/strelyaet-neispravnosti-pochistit-karbyurator.html

Setting up the VAZ 2106 carburetor

On a VAZ 2106 car, idle adjustment should be carried out provided that all filters are clean (at least install a new air filter), the spark plugs are practically new, and the ignition system works perfectly

Please note that the air filter must be installed when adjusting the carburetor. You also need to take into account that the level in the float chamber must be adjusted in advance if necessary

Don't forget about the valve clearances either.

Adjusting the idle speed on a VAZ 2106 car occurs by rotating two screws - the quality and quantity of the fuel mixture. The procedure begins by turning the fuel mixture quality screw. This is done using a flat-head screwdriver to achieve the maximum engine crankshaft speed.

Then, turning the quantity screw, set the frequency to about 1100 revolutions. And the last step is to set the final idle speed at 800-900 by turning the mixture quality screw.

If the idle speed sensor does not work on a VAZ 2107 with an injector engine, this manifests itself in unstable operation at idle and during startup. In the event of a malfunction of the DZH, an emergency situation may be created, since it is not visible that the driver is backing up. The article provides instructions for replacing the DZH and IAC, and also includes photos.

Important adjustment points

After the installed structural element has reached its optimal position, it is necessary to press the gas pedal: the motorist must check the functionality of the motor, which will “raise” the crankshaft speed without interruption. At the same time, there should be no sudden damping of the engine after the pedal is released. If there are negative aspects, you will have to re-adjust the carburetor.

The CO content in the exhaust gases of the power unit must also be checked; according to the rules, after such manipulations it should decrease. With ideal performance of all components, CO should fluctuate within 1.5%.

When the screws do not help normalize the speed, the car owner will have to additionally check the power unit, since such moments indicate that the fuel “goes” to the mixing chamber, bypassing the idle system. In this case, you need to pay attention to the carburetor solenoid valve to close it. At the same time, you should measure the diameter of the nozzle hole, which is sometimes larger than necessary.