We change the camshaft oil seal on a VAZ-2110 with our own hands (+ video)

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Many car owners are well aware that the main role of the camshaft oil seal is to prevent oil leaks through the joints. In other words, the cuff, that is, the oil seal, performs the tasks of a seal. But this is not its only function.

Element appearance

Replacing the camshaft oil seal step by step with photos

Having prepared the necessary tools, you can get to work.

First of all, disconnect the negative terminal from the battery on your VAZ 2114. Move the piston of the first cylinder to top dead center. Remove the pulley from the camshaft. The key is then removed from the camshaft. The seal is easy enough

You just need to pry it off with a flat screwdriver. Before installing the new device, pay attention to the inner edges on both sides. They should be free of all kinds of damage, dents, rubber sagging, etc. The working edge must be lubricated with plain motor oil

This will allow the element to easily settle into a new place and also protect it from premature wear. If problems arise with the reverse pressing of the oil seal, its seating edge can be processed with a file or fine sandpaper. Inside the block head, the element is installed with its working edge. A regular wooden stick will help you carefully place the element in its place on the camshaft. Just do not use metal elements for pressing. It should be pressed in until it stops. Perform the assembly reassembly procedure. The camshaft pulley is installed as a protruding element of the hub in relation to the power unit. Be sure to adjust the camshaft belt tension level.

At this point, the installation procedure for the camshaft oil seal can be considered complete. The most difficult stage is rightly considered to be the disassembly stage. Replacement is quite simple. Every VAZ 2114 owner is able to cope with such a task with his own hands.

Very useful recommendations

We recommend not pouring diesel oil (as amateurs advise) into a gasoline engine; a thick sediment will appear in it, which will lead to blockage of all oil channels of the engine.

This work requires some skills from you, if you are already familiar with the structure of the motor and the tools, and are not afraid to disassemble the engine yourself, then strictly following our useful tips, you will be able to replace the valve seals with your own hands.

To replace, you will need a new set of valve stem seals (see VAZ 2106: replacing valve stem seals on your own), which we recommend ordering from a store specializing in spare parts or purchasing immediately; the caps are in stock.

Ask: Why in a specialty store? Because, having experience, we have made the following conclusion - a specialized store is interested in a good reputation and, in principle, will not sell “inappropriate” or obviously low-quality goods.

In any auto market, the choice of caps is much wider, sometimes sellers have no idea who the manufacturer of the product is, so don’t expect any guarantee of quality in this case. It is reliably known that the bulk of cheap spare parts on the auto market today are imported from China.

In a specialized spare parts store, the seller can determine by computer, by entering the code in your data sheet, the engine model, based on this data, and select the necessary (suitable) valve seals.

Replacement procedure

Replacing the camshaft oil seal on a VAZ-2114 8-valve car and other vehicles equipped with a similar engine is practically no different from that on the 16-valve power units of the 2112 model. However, there are still some differences.

Performing manipulations on 8-valve engines

The replacement procedure begins with fixing the car in a stationary state using the parking brake and “heels” under the wheels. The gear lever must be in neutral. After this, using a 10mm wrench, the timing cover is removed.

The camshaft and crankshaft pulleys should be installed in the TDC position. To do this, the mark on the camshaft sprocket is aligned with the installation lug located on the rear cover of the timing drive. After the gas distribution mechanism has been brought to the required position, it is fixed using a screwdriver inserted into the teeth of the flywheel.

Using a 17 key, loosen the tension roller bolt and remove the belt from the upper sprocket. After this, the camshaft pulley is secured from turning and the bolt securing it to the end of the shaft is removed. The star itself is removed

When dismantling the sprocket, care should be taken, since under it there is a small semicircular key, which is very often lost during the disassembly of the timing drive.

After the above-described manipulations, the camshaft oil seal is removed using a screwdriver. The new part is lubricated with engine oil and pressed into place using a special mandrel. If you don't have one, you can use a socket head of a suitable size. Assembly of the mechanism is carried out in reverse order.

Performing manipulations on 16-valve engines

Replacement of VAZ-2112 camshaft oil seals is carried out in a manner similar to that described above. In this case, the exhaust camshaft sprocket is first dismantled, then the intake camshaft. The amount of work increases slightly due to the greater number of mounting points for the timing cover.

In addition, special care should be taken when reassembling the mechanism and setting marks. On 1.5 liter 2112 engines, incorrect installation of timing marks often leads to damage to the valve mechanism and CPG

Conclusion

Replacing camshaft seals on an 8-valve VAZ-2110 is quite simple and easy. This operation does not require any special skills or abilities. Separately, it is worth noting that the choice of oil seals should be taken seriously, since a low-quality product can affect not only oil loss, but also the wear of the camshafts themselves. If the described operations are too complicated for a car enthusiast, then it is recommended to contact a car service center, where they will do everything quickly and efficiently.

Source

Replacing the cuff

Replacing camshaft seals on a VAZ 2112 begins with standard procedures:

• It is necessary to stop the car with the handbrake, engage first gear and put “shoes” under the wheels
• Then we de-energize the electrical circuits of the car by removing the terminals from the battery

We still have to get to the cuffs themselves, so we remove all the interfering components and parts in order:

• The drive belt of the electric generator is in the way, so we loosen the tightening of the lower and upper nuts securing it
• Then, to loosen the drive belt, we bring the generator closer to the cylinder block, to do this we turn its adjusting bolt counterclockwise, as in the photo below

The adjusting bolt for tensioning the drive belt allows you to move the electric generator closer or further from the motor, while releasing or tightening the drive belt.

Adjusting bolt for tensioning the drive belt

So:

We use the “10” socket with a ratchet to unscrew the six bolts that secure the front cover of the timing case and remove it

Unscrew the mounting bolts of the timing casing and remove the casing

• Then you need to remove the right wheel, as well as the plastic shield from the engine compartment
• Take Head “17” with a knob and turn the crankshaft in the direction of the clock hand
• In this case, we place the head on the bolt that secures the electric generator drive pulley.
• Rotate until the marks on the camshaft toothed pulleys coincide with the marks on the rear timing belt cover.
• In this case, the engine flywheel mark should be opposite the slot in the clutch housing cover
• We insert a screwdriver between the flywheel teeth, through the hole in the clutch housing, to secure it from turning.
• Then you can safely unscrew the bolt that secures the generator drive pulley, and remove the pulley
• Now, using the “17” key, you need to loosen the nut of the timing belt tensioner roller
• We turn the roller and loosen the belt tension, then remove its rear branch from the exhaust camshaft pulley, then from the belt tension roller and the coolant pump pulley

Remove the timing belt after loosening the tension roller

• Then carefully remove the belt from the crankshaft and exhaust camshaft pulleys, as well as the support roller.
• We take a spanner “17” and unscrew the bolt that secures the camshaft pulley so that the camshaft does not rotate and the marks do not go astray, insert a screwdriver into the pulley hole and thus hold it

We unscrew the “17” key, the bolt that secures the pulley, and use a screwdriver to hold the camshaft from turning

• You can remove the toothed pulley from the camshaft and at the same time pull out the key, if it sticks out, if the key is recessed, it will not interfere with removing the oil seal, then you can leave it in place
• We pull the oil seal out of the seat using curved pliers or a screwdriver

Pull out the oil seal using a screwdriver

Installing the oil seal

All that remains is to insert the new oil seal into place; for this you also need instructions:

• Before installation, it is necessary to lubricate the working surface of the cuff; use engine oil for lubrication.
• Then we press the cuff into the seat
• Pressing should be done carefully so as not to “lift up” and damage the rubber of the oil seal rim
• To perform pressing, it is better to use a hammer with a plastic or rubber head.
• He will also use a mandrel or a piece of pipe of the required diameter.

Press the cuff into place with a hammer and mandrel

• In this case, the edges of the oil seal must be flush with the edges of its seat
• We do the same with the second camshaft oil seal, if necessary.
• Replacement of camshaft seals on a VAZ 2112 was completed successfully
• Then we install the pulleys, timing belt, generator drive pulley, timing case and generator drive belt
• The tension of all drive belts should be adjusted.

As you can see, the procedure can be done with your own hands, requiring a minimum of tools and no specific knowledge. Remember - replacing the cuffs in a timely manner will save you from more serious problems. Additionally, there is always the opportunity to study video materials.

VAZ 2109: replacing the camshaft oil seal without problems VAZ 2110 camshaft play - solving the problem Replacing the VAZ 2110 camshaft oil seal using an independent method Replacing the VAZ 2110 camshaft and all about it

This is interesting: Replacing the coolant temperature sensor VAZ-2112 16 valves: we explain all the nuances

Assembly

Reassembly is carried out taking into account the position of each part. Make sure that each plug is in place and that all parts, including the seal, are thoroughly lubricated before installation. The cuff is pressed in carefully using a hammer with a plastic or rubber head, and its edges should be flush with the seat.

• Author: ratico19
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What does the cuff affect?

To assess the full significance of the role of the camshaft oil seal, let's try to work backwards. Let's take a closer look at what can happen if the oil seal fails and stops reliably performing its tasks.

1. The minimum harm that a faulty cuff can cause is oiliness of the entire engine compartment.
2. Oil consumption will increase significantly; you will have to add lubricant regularly. The corresponding warning light will constantly remind you of this and will soon become annoying.
3. If the oil level drops, valve knocking will begin, which will soon fail. It's only a matter of time.
4. Non-metallic elements of the engine compartment that are filled with oil will soon collapse, become deformed, and cease to perform their tasks efficiently.
5. If oil gets on the contacts, it will cause problems with starting the engine.
6. The camshaft position sensor will begin to generate errors. This will entail an increase in fuel consumption, since the ECU will not be able to regulate the supply of fuel to each cylinder; the load will be the same everywhere.

Functionality check

Before you start replacing the cuff, if you find traces of oil on the engine, you need to carry out several checks:

• It is likely that the system responsible for ventilating the oil sump is clogged;
• The hoses in the system may become pinched, causing a malfunction.

If checking these elements shows that everything is in order, you will have to replace the oil seal.

We advise you to pay attention to several important points

1. Start the engine and listen for rattling valves or a loose camshaft making noise. A regular stethoscope will help you here, which will provide more accurate listening. It is likely that you will need to replace the cuffs and camshaft, or its components that are responsible for the knocking.
2. In some situations, knocking can be eliminated by simply replacing the timing belt.
3. Check the engine at idle speed. If the engine operation is unstable, or it is difficult to start the engine, check the condition of the camshaft position sensor. Sometimes replacing this element returns the motor to its previous operating efficiency.

To replace the problematic oil seal, you will have to perform several disassembly steps. As a result, you will need to do the following:

• Remove the front protective cover, and then remove the timing belt;
• Remove the camshaft pulley mounting bolts. To do this, hold the element with a screwdriver to prevent it from turning, and perform the removal procedure itself using a 17 mm wrench;
• Remove the toothed pulley;
• Remove the oil seal. For this operation, you will need a flat-head screwdriver or needle-nose pliers.

This set of measures will allow you to remove and replace the oil seal. But we advise you to check the condition of the camshaft and, if necessary, replace it.

To get to the camshaft you need:

• Remove the oil pressure sensor completely. If you don’t want to dismantle it, then at least disconnect the wires from the device;
• Unscrew the camshaft bearing housing mounting bolts. There are as many as 20 of them there. After this you can easily remove the case;
• Do not forget about the plugs that are located in each technological hole. Take them out;
• Disassemble the potentially problematic camshaft and determine the need for repair or replacement.

Reassembly

When reassembling the assembly, be sure to take into account the position of each dismantled element. Be careful with the plugs. Make sure that each of them is strictly in its place.

Before installing the oil seal and additional elements, do not forget to lubricate them thoroughly. The seal can be pressed into place using a hammer. Just not metal, but rubber or plastic. Make sure the edges are flush with where the component will be installed.

Functionality check

Before replacing the oil seal, if you find traces of oil on the engine and related parts, you must first check:

• the system providing crankcase ventilation may be clogged;
• whether the hoses of this system are pinched.

If no faults are found here, it means that you still need to change the camshaft cuff of the VAZ 2110.

At the same time, take a stethoscope (this is how you can determine better), start the engine and listen to see if you can hear the knocking of the valves or the camshaft itself, which has become loose. And if the knocking is noticeable (especially where the plug is), then perhaps not only the cuff needs to be replaced, but also the camshaft itself, or at least a number of its parts that are responsible for the knocking noise. Sometimes it is possible to eliminate the knocking noise by replacing the timing belt.

Camshaft position sensor

In addition, if the engine is unstable at XX and/or it is difficult to start, check whether the camshaft phase (position) sensor is working properly. It is installed on the left front side of the cylinder head. The camshaft position sensor on the VAZ 2110 is used to determine the phase of the valve position and transmit an impulse to the control unit, which adjusts fuel injection depending on the position of the valves. Sometimes only replacing the sensor helps return the engine to normal operation.

Sports camshafts for VAZ-2110

Daily trips in our universal “basin” did not cause any particular discomfort. The high-speed injection VAZ engine struggled, but accelerated the car quite tolerably. But as if mocking the limited capabilities of the engine and the driver’s constant attempts to get to the next traffic light first, even Russian-assembled pseudo-Korean sedans overtook it.

In the end, we got tired of it, and we decided to do some light tuning of the engine, namely, change the factory camshaft to a sharper one, thereby changing the valve timing and ensuring more efficient filling of the cylinders with the working mixture in the higher speed range. Before this operation, measurements on a power stand showed that the experimental “2111” in its standard version has 80 hp.

At the AT Racing company, in addition to replacing the camshaft with a Master Motor, the VAZ vehicle was given chip tuning by its mechanics - they installed an injection controller reconfigured for the new shaft. I also had to change the throttle pipe (the standard one, with a 46 mm hole, was replaced with a wider one - 52 mm). To top it off, in place of a rather large box, “pregnant” with a standard air filter, there was a direct-flow filter cylinder from “K

About the oil seal

The oil seal is one of the most common and long-invented sealing devices for moving mechanisms. This part is widely used due to its simple design. It should be noted that the oil seals used in VAZ cars have a direction and need to be installed only in the designated direction of shaft rotation.

Purpose of oil seals

Valve seals are designed to remove excess oil that gets onto the valve stems. It is the excess, a certain amount of it that should wash the sleeve with the valve. If the valve seals (for some reason) stopped working (became unusable) and oil began to get into the combustion chambers, you need to replace the valve seals on the VAZ 2106.

Device

The oil seal is made of special rubber, which does not lose its properties when in contact with oil. This kind of rubber is called oil-resistant.

Structurally, the oil seal is similar to a ring; inside the oil seal there is a so-called “box”. Which, under the influence of oil pressure, is pressed against the working part of the shaft and creates a tight seal.

The oil seal also has a spring that presses its working part against the shaft ensuring tightness.

Dimensions of the oil seal distributed by VAZ

The dimensions of the oil seal installed on the camshaft of VAZ cars are the same only for front-wheel drive Lada cars. It should also be noted that the dimensions of the oil seal do not differ depending on the type of engine, that is, if the engine has 16 valves, then the oil seals for each camshaft will be the same.

Oil seal size: 28*42*7

Where is

The oil seal is located under the timing belt boot, behind the camshaft gear.

The oil seal must be replaced if engine oil leaks through it. This leak can lead to oil getting onto the timing belt, which is strictly prohibited. Oil can damage the belt and lead to its breakage, which on 16-valve engines can lead to valve bending.

Signs that the seals have become unusable

In addition to smoke from the exhaust pipe, there are a number of signs:

• Appearance of grease on the spark plug threads
• The car smokes when the engine is cold (this is very noticeable when starting the engine in the morning)
• Dark stripes appear on the camshaft bed in the area of ​​the passing cap
• Increased oil consumption
• Frequent failures of one or more spark plugs

Do not rush to make major repairs right away, knowing that smoking and increased oil consumption may occur due to failure of the piston rings (see Replacing piston rings on your own), and some others. First, let's identify the problem so that the cost of the issue becomes clear:

• To distinguish a malfunction of valve seals from other malfunctions with similar symptoms, use a useful device - a compression meter.
• By measuring the compression in each cylinder, you will know exactly what needs to be repaired.
• Since worn valve caps have virtually no effect on the compression readings (if the compression in all cylinders is within the normal range, it means that the valve stem seals have failed; if the compression is weak in some cylinder, get ready for a major engine overhaul)

Valve seals become unusable during operation for the following reasons:

• Natural production of materials
• Engine overheating
• Use of valve seals made from low-quality materials
• Increased clearance in the valve bushings themselves
• Initially incorrect installation of oil seals

Professionals say that for the VAZ 2106, replacement of valve seals is necessary every 18 - 25 thousand kilometers

Installation and replacement of VAZ-2112 camshafts 16 valves: photo, video

Replacement of camshafts on the 16-valve VAZ-2112 engine occurs when they wear out and the support journals wear out. Most often this happens when the time for a major overhaul of the power unit or cylinder head passes. This is a rather complicated procedure, but you can really do it yourself.

The video below shows the installation of camshafts and split gears on a 16-valve engine of the VAZ family

The video material will tell you how to replace camshafts on a VAZ-2112 16 valves, and give some recommendations and advice.

Camshaft replacement process

Camshafts with gears and fasteners

In order to install camshafts on the VAZ-2112 16 valves, they must first be dismantled. Like any spare part, they are installed in the reverse order from disassembly.

So, let's look at the step-by-step process of removing and installing the intake and exhaust camshaft.

Removing camshafts

1. To begin with, as with any repair operations, it is necessary to remove the “minus terminal” from the battery.
2. Remove the timing belt cover.

After unscrewing the mounting bolts indicated in the diagram, remove the timing cover

Now you need to remove the valve cover

Please note that the bolt tightening order must be followed during assembly.

Unscrew the fastening nuts and remove the valve cover.

Disconnect the wires of the emergency oil pressure sensor, and then unscrew it.

Disconnect the emergency oil pressure sensor

Using a socket wrench or 8mm socket, unscrew the 20 bolts securing the camshaft cover.

Scheme for dismantling and tightening the camshaft bearing housing bolts

We dismantle the camshaft bearing housing. Now, there is free access to two plugs that are located on the rear side of the cylinder head. We take them out.

You need to be careful with the camshaft plugs; if you install them incorrectly, oil will leak out. If you don’t notice it in time, you’ll shorten the engine’s lifespan or end up in need of a major overhaul.

Remove the two rear cylinder head plugs

We take out the intake camshaft. We take out the exhaust camshaft.

We remove the camshafts from their seats

We press the seals out of the camshafts.

Remove the seals from the camshaft. If it does not come off, carefully cut it or pry it off with a screwdriver.

Installation of camshafts

Now that everything is removed, you can proceed to installing new camshafts on the car:

1. Lubricate the cams and shaft support journals with engine oil.

Lubricate the camshaft journals and cams with engine oil.

We place each camshaft in its seat. It is worth considering that camshafts are not interchangeable, so they should not be confused.

The intake camshaft is shown on the left and the exhaust camshaft on the right.

Apply sealant to the surface of the cylinder head and camshaft bearing housing.

How to apply sealant to the camshaft bearing housing cover

We put the camshaft cover and cylinder head in place. Tighten the bolts evenly to a certain torque. We press new oil seals and install the rear plugs.

We press new oil seals onto the camshafts

We collect the remaining parts that were removed from the car.

Choice

Cylinder head camshafts for the VAZ-2112 are produced only by the manufacturer, so there is no need to look for analogues.

Original catalog numbers: inlet - 2112-1006015, outlet - 2112-1006014. Each camshaft costs an average of about 3,000 rubles.

Intake camshaft marking Exhaust camshaft marking

Nuances

When installing the bearing housing and cylinder head, do not apply sealant that contains silicone. This is due to the fact that the motor heats up, and accordingly the sealant heats up, which releases vapors that can get into the cylinders and further through the system. You should use a sealant whose instructions or packaging indicate that it is safe for the oxygen sensor.

When applying sealant to cavities, you should not apply a lot of it, because when tightening the bolts, it can get inside and this will lead to clogging of the oil channels, and therefore there will be no lubrication. The lack of lubricant will lead to increased wear of parts that will quickly fail.

Replacing and installing camshafts on a 16-valve VAZ-2112 is not entirely easy, but it is quite possible

The main thing to ensure results is caution and following instructions. It is worth noting separately that the intake and exhaust camshafts are different and not interchangeable. On the intake there is an additional border for the phase sensor

On the intake there is an additional border for the phase sensor.

Disassembly procedure

1. The front protective cover, and then the timing belt of the VAZ 2110;
2. Unscrew the camshaft pulley mounting bolt (key 17), holding it from turning with a screwdriver;
3. Remove the toothed pulley;
4. Use a screwdriver or thin pliers to remove the oil seal.

If you only need to replace the cuff, then the analysis can be considered complete. If we continue further, then we need:

1. It is better to remove the oil pressure sensor completely, or at least disconnect the wires from it;
2. Unscrew the bolts securing the camshaft bearing housing (there are 20 of them) and remove the housing;
3. Please note that there is a plug in each technological hole. They need to be removed;
4. Next, disassemble the camshaft and decide whether it can be repaired or whether a complete replacement is needed.

How is the crankshaft oil seal replaced?

To successfully complete the task, you first need to arm yourself with all the necessary tools and prepare an inspection hole in the garage to perform a whole range of work.

Developments from the following manufacturers are recommended for purchase:

Screwdrivers, wrenches, sockets, and new seals should be on hand. All work comes down to separate replacement of the front and rear crankshaft oil seals.

Changing the front oil seal

Access to the front crankshaft oil seal largely depends on the specific make of the car, so before carrying out all the work, it is advisable to read the operating instructions with all the necessary information. For owners of domestic cars, in particular the VAZ brand, all work comes down to the following steps:

1. At the first stage, the tension of the generator belt is weakened
2. The belt is completely removed from the pulley
3. The nut that serves to clamp the pulley is unscrewed
4. Remove the pulley from the shaft
5. In car modifications with a transverse engine, the oil pump housing is removed
6. Pry a screwdriver under the oil seal and remove it from its seat
7. Installing a new seal
8. We assemble the parts in reverse order

It is advisable to treat the junction of the oil seal with the crankshaft with machine oil and apply the substance to the outer surface of the seal and the output end of the shaft.

Changing the rear oil seal

This type of work requires a lot of time and effort from the car owner. To get to the rear oil seal, you need to disassemble the cardan and disconnect the box and clutch housing. The next steps are as follows:

1. We dismantle the gearbox along with the clutch basket, do not touch the flywheel
2. Loosen the bolts securing the flywheel to the engine
3. To set the flywheel to a static position, fasten one gearbox mounting bolt and insert a screwdriver, resting the teeth against the mechanism
4. We remove the retaining plastic, and only after that the flywheel itself
5. Unscrew the rear clutch shield and release the fasteners connecting the rear engine cover
6. Find the rear oil seal and remove it with a screwdriver
7. Lubricate the seat
8. Press in a new copy with a screwdriver

It would not be superfluous to replace the rear cover gasket; it is also advisable to lubricate all contacting parts with machine oil during work. Then we assemble the entire assembly in reverse order.

Selection of parts for tuning an 8 valve engine

Before tampering with the engine, it is necessary to accurately determine:

There are about a dozen different types of camshafts, with significant differences in characteristics. Eg:

In other words, we can say that there are three main types of camshaft designs:

• “low-level” (increased power at the “lower” levels from 1200 rpm)
• “civilian” (average version)
• “main” (sport mode, increase at the “top”)

According to the laws of physics, it is impossible to achieve the same increase in all modes, so you should immediately decide on the type of camshaft.

Practice shows that for quiet driving around the city, with the possibility of saving fuel, a “low-level” camshaft is most suitable. For city-highway traffic, it is better to choose the middle option; for highway drivers, the “highway” option is more suitable.

To achieve maximum effect, you should immediately install a split timing camshaft drive gear.

Causes of malfunctions

The main cause of the malfunction is simple mechanical wear. Any oil seal is, by its nature, a consumable - after a certain period of time it begins to deteriorate, since it is made of an elastic material.

The malfunction may manifest itself in the form of changes in shape, swelling, scarring, rupture or chipping of the material from which the consumable is made. Another manifestation of a malfunction may be the cuff being completely squeezed out of the seat.

Other causes of problems with the camshaft oil seal are incorrect selection of consumables, manufacturing defects, or incorrect installation. In these cases, the oil seal also does not perform its functions and needs to be replaced.

This is interesting: Malfunctions of the exhaust system of VAZ 2110/2112. Muffler replacement

Location

Finding the oil seal is not difficult. To do this, you need to know a basic thing - the location of the camshaft.

The oil seal is located directly behind the camshaft pulley. You can assess its condition by dismantling the pulley or without removing it. In the second case, the assessment will not be so objective.

Location

Tuning and sports camshafts

Replacing the camshaft in a VAZ 2110 with a sports one

If there is a need to do engine tuning, but there is no clear definition of which camshaft to install, you should consult with the experts. In addition, you need to familiarize yourself with the basic information.

Sports camshaft

As a rule, the camshaft can be low or high:

• The advantage of the first option is an increase in torque at the “lower” levels, due to this it becomes possible to sharply accelerate without engaging a lower gear. At medium speeds, such camshafts are no better than serial products, while at high speeds they are even worse.
• in the second option, the opposite picture is observed; here we mean high rises, which increase engine power, while high torque goes towards high speeds. A significant drawback lies in the failures at the “lower” levels. The better the performance of the overhead camshaft, the stronger this effect.

https://youtube.com/watch?v=mVhKFl9yj5U

Camshaft tuning scheme

As a rule, tuning camshafts have a lift of up to 11 millimeters. If this figure is higher, then the camshaft will be called sports. Despite this statement, there are exceptions.

Camshaft tuning

Often, car enthusiasts prefer tuning shafts, since sports cars are almost never used in city conditions. They are characterized by a small dip at the “bottoms”, as well as unstable high idle speeds. Greater efficiency can be observed only at maximum speed, and this is unacceptable in normal urban conditions.

Any repair of the car will be undertaken by the service station technicians, but there is no need to spend money on such services, since today, with the help of videos and photos, it is possible to do everything yourself. If the process of replacing the camshaft is being performed for the first time, step-by-step instructions will definitely help. Since the price of repairs at a car service center is now high, most car owners try to repair the car themselves, using advice and recommendations. It may take longer to replace a part this way, but you can save a lot of money.

How to tighten the cylinder head bolts

Be sure to tighten according to the diagram given in the article. To tighten the bolts, you need to follow a few simple steps:

1. Install a new head gasket and place it on the centering bushings.
2. Install the head and tighten its mounting bolts.
3. Start tightening with a torque of 20 N*m. If the scale is in “kgf/m”, then divide by 10.
4. In the second run, you need to tighten all the bolts according to the diagram by 90 degrees.
5. During the third pass they turn another 90 degrees.

Bolts with a length of 95 mm or more cannot be used. In general, the procedure is quite simple, but a torque wrench is required - without it, it will not be possible to maintain the correct tightening torque of the VAZ-2112 cylinder head (16 valves).

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Do-it-yourself oil seal replacement

The process of replacing the camshaft oil seal is almost the same on all cars. After a certain mileage, depending on the car, spots of engine oil appear in the area of ​​the camshaft pulley and oil seal, and with each increase in kilometers they increase. This means the camshaft seal needs to be replaced. You will learn how to do this yourself below.

The point is not even that you are losing oil, but that it ends up on the camshaft drive pulley and timing belt, and such a turn of events is already dangerous. Hot engine oil begins to deteriorate the rubber of the belt, which immediately reduces its service life; in addition, the belt also becomes slippery, and this can lead to slippage of its teeth on the teeth of the pulleys.

This may result in bent valves or cracks in the pistons. In any case, it is necessary to get rid of oil drips, that is, you need to replace the seals.

The best option would be not to make marks with your own marker, but by turning the bolt on the crankshaft pulley in a clockwise direction, align all the pulleys according to the factory marks that are on the pulley and on the engine block (they need to be clarified in the manual of your motor, since on different engines there may be different marks).

It also happens that there are no marks on the engine, but only on the camshaft pulley, therefore, install the mark on the pulley opposite the plane of the connector of the head and the engine block, but it is best to check in the manual.

1.First you need to unscrew the bolts and remove the timing belt protective cover.

2. Then you need to remove the valve cover by unscrewing the bolts securing it.

3.Then we begin to place marks on the belt and camshaft pulleys. This is done so that later the disassembled parts can be reassembled with precision.

4.After this, it is necessary to loosen the fixation of the belt tension roller and loosen the belt tension.

5.Next, carefully remove the belt from the camshaft pulleys.

6. Using a wrench, unscrew the bolt that secures the camshaft pulley; it is best to lock the pulleys to avoid turning, using a pry bar.

7. Next, you need to remove the pulley or pulleys, if there are two of them, using a puller from the end of the camshaft, and mark where, which pulley was which.

8. Remove the key from the camshaft. And using a screwdriver or tweezers, remove our oil seal, carefully so as not to damage the surface of the camshaft on which the oil seal rubs.

9. Then we lubricate the outer surface of the oil seal with sealant, and the inner surface with engine oil and put it on the camshaft, then press it in. If you have an engine with two camshafts, then you need to replace two oil seals.

10.After replacing the oil seal, we begin to assemble all the parts, first we put the key in place.

Why is it necessary to replace on time?

On the left is the new seal, and on the right is the old one

It will be no secret to anyone that timely replacement of the camshaft oil seal will not harm the engine in any way, but will only increase its performance characteristics. The time period for replacing it is not determined in any way and depends only on the mileage and driving style. Since frequent and intensive use of the engine leads to rapid wear of all these parts.

Timely replacement of the oil seal will prevent oil leakage from the engine, which is its main task.

However, if this moment was missed and a leak did occur, this will be accompanied by very unpleasant facts:

• Oil consumption will increase.
• The engine will be constantly dirty , since dust from the road will constantly stick to the oil that spills onto the engine.
• Also, oil that leaks from the engine will negatively affect the general condition of various electrical contacts and elements. First of all, this applies to electrical power supply blocks, where contact may be deteriorated.

Replacing the camshaft oil seal - the main nuances of the work

• Replacing the camshaft oil seal - the main nuances of the work
• When does a camshaft oil seal need to be replaced?
• Replacing the camshaft oil seal
• Do-it-yourself oil seal replacement
• And now more about replacing the oil seal with your own hands:

Good afternoon, our dear readers. Do you know why the sealing element is called an oil seal? Let us go back a little to the recent past. And only after this, when we learn this fact, will we consider all the issues on our topic today.

• When does a camshaft oil seal need to be replaced?
• Replacing the camshaft oil seal
• Do-it-yourself oil seal replacement
• And now more about replacing the oil seal with your own hands: