Replacing the timing belt on a 16-valve Lada Largus: K4M engine

The Lada Largus model is loved by many owners of this car. The designers made the car quite roomy, which allows it to be defined as a “family” car, and the budget price of the car was liked by a large number of commercial organizations that use it as a traveling vehicle.

Therefore, it will be useful for drivers to know how to replace the timing belt on a Lada Largus. This is important, because when the belt fails, the pistons meet the valves and damage the valve mechanism.

How to check the condition of the belt on Largus

A broken timing belt on Largus leads to the fact that the valves remain open, and the pistons hit the “plates”, bending them. Such a breakdown leads to a major overhaul of the cylinder head and replacement of the pistons.

To prevent this from happening, you need to be able to recognize increased wear on the timing belt. Currently there are two ways to assess its serviceability:

• visual inspection;
• extraneous sounds.

An external inspection helps assess the visual condition of the belt. There should be no cracks or protruding burrs on it. It should be smooth and neat. An external assessment of the product can only be carried out with the protective screens removed.

Extraneous sounds can only be discerned by an experienced driver. If there are burrs on the old belt, they will hit the gears and other mechanisms with a characteristic soft sound. This may be a reason to inspect the timing belt.

Purpose of the timing belt and design features

To supply the fuel mixture into the combustion chamber and exhaust gases, valves are used, which are part of the gas distribution mechanism. There can be 8 valves for engines with one camshaft, or 16 for engines with two camshafts, depending on the model.

Valves

An important element in the timing belt is the valves, which are divided into intake and exhaust. The diameter of the intake valve is made larger than the exhaust valve. This allows you to reduce the time it takes to fill the combustion chamber with the fuel mixture and increase the filling ratio. The inlet valve controls the flow of low-pressure mixture, hence providing a lower filling rate. The exhaust operates under high pressure conditions, which allows you to quickly empty the combustion chamber. Therefore, for optimal operation of the internal combustion engine, the intake valve should have a diameter of about 45% of the piston diameter, and the exhaust valve should have a diameter of about 38%.

In order to optimize the operation of the valve mechanism, a chamfer is made on the outer side of the valve at an angle of 45 degrees. There is a similar chamfer, or seat, at the hole that closes the valve on the head of the block. To ensure the tightness of the valve and seat, they are ground in using special abrasive powders.

There are special requirements for the materials from which valves are made. This especially applies to exhaust mechanisms that have a higher operating temperature. As a rule, these are alloys of chromium, nickel, manganese and nitrogen compounds.

Exhaust valve stems are often hollow and filled with sodium, which has high thermal conductivity and can effectively dissipate heat.

Camshaft and drive

The opening of the valves at the right time is carried out by the camshaft using a lever or rocker (rocker arm). The rocker rests on a ball joint or hydraulic compensator at one end, and on the valve stem at the other. The eccentric - the camshaft cam - presses on the rocker approximately in the middle of its length, transmitting force to the valve. The valve is returned to its original state by a spring located on the axis of its stem. Torque is transmitted to the camshaft through a chain or toothed belt drive.

The engines installed on the Lada Largus use two design solutions for the gas distribution mechanism: with one camshaft and with two. Twin camshaft engines are increasingly used due to their greater power output due to better mixing and combustion of the fuel mixture. Despite the advantages of dual-head motors, single-head motors are also widely used due to their simple design, reliability and low cost.

How to select components for replacing the timing belt on a Lada Largus

The most important thing when selecting this product is the manufacturer. The car owner must be able to distinguish between manufacturers from whom timing belts can be purchased. Below is a list of trusted manufacturers you can trust:

• Renault;
• Lada;
• Gates;
• Contitech;
• Bosch;
• Dayco;
• Lemforder.

Often, original kits may contain belts from manufacturers such as Gates or Contitech. Therefore, there is no point in overpaying. It's better to get a cheaper set.

Another important point when choosing a timing belt is its shelf life. Since this is a rubber product, it has a limited time during which it can be stored.

Special numbers on the belt itself, for example, “5-30”. The number 5 means the year - in this case 2015, and 30 is the number of the week in which the product was manufactured. The permissible storage period of the belt is 5 years. If its age is higher, it is clearly not worth installing such a spare part.

If you install a timing belt on a Lada Largus with an expired expiration date, its breakage may occur even earlier than the required replacement according to the regulations - after 10 or 20 thousand kilometers. By the way, it is after this that bad reviews about the best manufacturers may appear.

To find out the expiration date, just pay attention to the special inscriptions placed on the packaging. For example, “Install < 08.2021”, as in the photo above. This means that this belt can be installed no later than August 2022.

Delivery by transport company (cash on delivery, no prepayment)

Advantages:

• the cost of delivery of heavy and large-sized orders is much cheaper than that of Russian Post;
• There are practically no restrictions on the weight and dimensions of cargo;
• There is a wooden crate service - this is an additional guarantee of the integrity of the order.

Disadvantages: unfortunately, there are branches only in cities.

The estimated cost of delivery for an order up to 30 kg is 450 rubles.

List of transport companies with which we cooperate:

• TC "PEK" (cash on delivery service available);
• TC "Business Lines";
• TC "Energia";
• TC "KASHALOT" (KIT) (cash on delivery service available);
• TC "SDEK" (cash on delivery service available);
• TC "DPD";
• TC "ZhelDorExpedition";
• TC "VOZOVOZ";
• TC "Baikal-Service".

To send your order by transport company:

1. Place an order in our online store by phone or on the website (registration is not necessary);
2. After we receive it, our manager will contact you by phone to clarify the cost, delivery time and your wishes. Next, we will pack your order carefully and then send it to you;
3. You will receive a shipment tracking number from us via SMS or email (if available). You can monitor the status of the order coming to you using our tracking service, as well as independently, on the transport company’s website using the track number. After the order reaches your locality and the manager of the transport company contacts you, you need to receive the order at their office or order home delivery;
4. Upon receipt from the transport company, you pay the cost of delivery and order.

The cost of delivery is calculated based on the volume, weight of the selected product and the distance from the city of Tolyatti.

To send an order you must:

• indicate full name recipient;
• Your locality and region;
• series, number of passport or driver's license;
• Your phone number (contact).

TC "Business Lines" - Urgent delivery of goods from 1 kg throughout Russia. The exact cost can be found on the official website of the delivery service - https://www.dellin.ru

Necessary kit for replacing the timing belt

To perform this procedure, the car owner will need a set of tools for repairing the Lada Largus, as well as the corresponding spare parts. The timing belt consists of a kit that includes:

• the belt itself;
• tension roller;
• guide roller (if equipped).

In addition to the rubber product in this mechanism, it is strongly recommended to replace the pump. Despite the fact that it has a service life and replacement schedule twice as long as the timing belt, it still needs to be replaced.

Belt sets with pumps and corresponding articles are presented in the table below:

Spare parts and tools

The car, equipped with a K4M gasoline engine, has an original timing belt. It provides maximum service life. Look in the manual to find out the article number of the belt and other drive parts: rollers, bearings, pulleys. For the Lada Largus car - article number 130C17529R , 16-valve K4M engine. The recommended analogue is Gates K035671XC , and for Renault Lada Nissan - Gates K016PK1823XS .

In addition to spare parts, you will need:

• garage tools - set of sockets, screwdrivers, wrenches, ratchet, jack, hammer, pliers
• device for fixing pulleys RV
• marker
• penetrating lubricant WD-40.

Replacing the timing belt on a 16-cl VAZ-21129 engine

You can change the timing kit on this engine only in a garage. To do this, you need to perform several complex and responsible actions. If you are doing such an operation for the first time, it is better to do it under the supervision of an experienced specialist.

Dismantling the old product

To do this, follow the following procedure:

1. Disconnect the negative terminal of the battery.
2. Hang up the right wheel and remove it.
3. Remove the right fender liner.
4. Remove the drive belt.
5. Remove the crankshaft pulley.
6. Suspend the engine using a rolling jack and remove the right engine mount.
7. Set the PB marks in accordance with the photo above by turning the crankshaft.
8. Loosen the tension pulley and remove the old timing belt.
9. Drain the antifreeze and remove the old pump.
10. Remove the old tension roller.

Installing a new belt

To install a new timing belt, you first need to install a new pump and tension pulley. After this, the following procedure is performed:

1. Install the new belt starting at the crankshaft.
2. Make sure that the camshafts do not rotate and maintain the position of the marks. You can use clamps for this.
3. Tension the belt using a roller. To do this, it must be tightened to a torque of 5 Nm. The tension will occur automatically after one revolution of the crankshaft.
4. Turn the crankshaft two turns and check that the marks match.
5. If all marks match, the timing belt was installed correctly. Otherwise, you must repeat all procedures from the beginning.
6. Reassemble all other parts in reverse order.

Attention! Do not turn the crankshaft until the belt is on! Otherwise, there is a risk of bending the valves.

Replacing a toothed belt on an 8-valve VAZ 11189 and 11182 engine

Despite the fact that this is the weakest Largus motor, it has a number of advantages. And one of them is simplicity and reliability. The timing belt on this engine can be changed while in the field, even if it breaks along the way.

Removing the old timing belt

To do this you just need to follow a few simple steps:

1. Remove the drive belt.
2. Lift the right wheel, dismantle it and remove the wheel arch liner.
3. Break off the crankshaft pulley mounting bolt, unscrew it and remove the pulley.
4. Relieve the engine mount by slightly lifting the engine with a jack (optional).
5. Unscrew both timing belt protective covers.
6. Set the marks in accordance with the photo by turning the crankshaft clockwise.
7. Loosen the tension roller and remove the old belt.

Installing a new timing belt

Installation is carried out in reverse order:

1. The tension roller is changed.
2. A new timing belt is being installed.
3. The tension roller is tensioned until the marks on it coincide.
4. Turn the crankshaft two turns and check that the marks match.
5. If everything is in order, tighten the roller to a torque of 33-40 Nm.

Replacing the timing belt on a 16-valve K4M engine

Everything is much more complicated here. To replace the timing belt on K4M engines, special shaft clamps are required, as well as camshaft plugs, since they are disposable. To access the plugs, you will need to remove the intake muffler housing.

Removing the old belt

To do this, follow these steps:

1. Lift the right side of the Lada Largus and remove the front wheel.
2. Unscrew the fender liner to expose the crankshaft pulley.
3. Loosen the accessory belt and remove it.
4. Remove the crankshaft pulley.
5. Remove the right engine mount by lifting it up.
6. Unscrew the timing belt protective covers.
7. We fix the crankshaft using a special device. Pre-set the timing marks. To do this, you need to remove the rear camshaft plugs and turn the CV so that the marks on them are horizontal. We fix it.
8. Loosen the tension roller and remove the old rubber product.

Installing a new product

Before installing a new belt, it is recommended to check the condition of the crankshaft oil seal. If necessary, it is recommended to replace it. Next, the following list of actions is performed:

1. Replace the tension and guide roller. The tension roller bolt must be tightened by hand.
2. We put the timing belt on from top to bottom.
3. To tension the belt, you need to insert the hexagon into a special hole and turn the eccentric until the flag is aligned with the slot.
4. After tensioning the belt, tighten the pulley bolt.
5. Pull out the clips and turn the crankshaft two turns.
6. Check that the marks match. If everything is in order, reassemble in reverse order.

Attention! Do not reinstall the old camshaft plugs. Be sure to replace them with new ones to avoid oil leakage!

Motor line of the Largus model

This station wagon from Togliatti is a “clone” of the popular “French” Dacia Logan MCV. For the Lada Largus, the manufacturer has provided two versions of the power unit, namely:

• 87-horsepower “four” (series “11189”) 8 valves, which is very familiar to adherents of VAZ models (according to Granta and Kalina);
• French unit “K4M” 16 valves, the power of which reaches 102 hp. With.

The 1.6-liter engines are equipped with distributed injection, which ensures compliance with Euro-5 standards.

Among the design features of 8-valve motors, there is a risk of valves bending when the timing belt breaks, and then the timing belt needs to be replaced. This aspect forces Lada Largus owners not to delay checking the condition of the belt in a timely manner and to resort to replacement after both the regulated period (mileage) and when the slightest signs of wear appear.

How to change the timing belt on an 8 valve Largus - K7M

The engine is similar to the 8-valve VAZ engine. Replacing rubber products is also easy, but with the use of special tools.

Removing a worn timing belt

By analogy with K4M, we perform the following actions:

1. Lift up the right wheel and remove it.
2. Remove the belt and fender liner protection.
3. We loosen and dismantle the belt of auxiliary units.
4. Raise the engine and remove the right engine mount.
5. Remove the timing belt protective cover.
6. Break off the crankshaft pulley bolt and remove the last one.
7. Remove the lower timing cover.
8. Turn the crankshaft until the mark in the photo matches.
9. Make a chalk mark on the crankshaft sprocket and cylinder block.
10. Unscrew the nut securing the tension roller and remove it by removing the old belt.

Installation of a new rubber product

If the pump is replaced along with the replacement of this part, then first you need to remove the old sealant and thoroughly clean the mating surface of the cylinder block. Install the new pump using sealant. Don't forget to install the gasket. Then follow these steps:

1. Install the new tension pulley onto the stud and tighten the nut by hand. The roller should stand in such a way that the direction of rotation coincides with the direction of the arrow on the roller body.
2. Install the new rubber product so that its bottom mark coincides with the mark on the KV sprocket.
3. We put the belt on the RV so that its mark coincides with the mark on the gear.
4. Using a wrench, tighten the tensioner nut until the mark matches. The same as on the VAZ engine. Fully tighten the nut to 30-40 Nm.
5. Check the alignment of the marks by turning the crankshaft clockwise several times.

Attention! Weak belt tension will cause the teeth to jump and shift the valve timing. This is fraught with problems with valves and pistons! Be careful!

Need for replacement

The function of the timing belt is to communicate between the crankshafts and the camshafts. Thanks to it, the operation of the shafts is synchronized. Manufacturers of Lada Largus 16 valve recommend changing the timing belt along with the tension roller every 60,000 kilometers. But unscheduled replacements are possible due to the condition of the strap.

If you do not monitor its condition, the belt may break, which will have serious consequences for the Lada Largus with 16 valves. When a break occurs, the synchronization of the shafts disappears and the valves meet the pistons. As a result, valves bend, pistons deteriorate, and there is a high probability of damage to the surface of the cylinders.

This requires a major engine overhaul or replacement.

For this reason, it is advisable to inspect the components of the gas distribution mechanism after 10 thousand kilometers. The timing belt needs to be replaced if the following defects are found:

You need to inspect the belt, as well as the tension roller and water pump, replacing them if there are defects or play.