Replacing the cylinder head gasket for a VAZ 2109

The cylinder head gasket is the most important gasket in the engine. Any inaccuracy during its installation or, moreover, manufacturing, leads to the inevitable death of the engine. Without exaggeration, we can say that the head gasket delimits the engine lubrication system, the cooling system and seals the combustion chambers. If you give the gasket some slack, the engine will at least knock or jam.

Why do we need and what are head gaskets made of?

The cylinder head gasket must be replaced when the head is removed. The gasket, although expensive, is a consumable item and cannot be restored or reused. The gasket has to withstand enormous loads. Both thermal and mechanical. The temperature in the combustion chamber can reach 1200°C, and in the VAZ 2106 it is no less than 1000°C, so the requirements for the material from which the gasket is made are very high.

The heat-resistant gasket is made of asbestos-containing material, which does not collapse or change its structure when exposed to high temperatures. Asbestos was banned for use in automotive technology, so it is now being replaced with new materials, but more often than not, the asbestos content is simply not indicated on the packaging of the gaskets. Ceramic gaskets are expensive, so they are used only on expensive cars, to which the nine has nothing to do.

In addition to the thermal load, the gasket must withstand the severe pressure that forms in the combustion chamber, as well as ensure sealing of the oil channels and cooling system channels. To do this, the head gasket must have a certain elasticity and strength. Tensile strength is given to it by reinforcing materials, which most often are thin steel wire.

replacing the cylinder head gasket on VAZ 2108, VAZ 2109, VAZ 21099 cars

If a leak of engine oil or coolant is detected at the junction of the cylinder head with the cylinder block, remove the cylinder head and replace the head gasket. A leak can also occur due to warping of the block head due to overheating.

WARNING The head gasket is a one-time use, so each time the head is removed, the head gasket must be replaced.

1. Disconnect the wire from the “-” terminal of the battery.

2. Disconnect the wire from the coolant temperature sensor.

3. Disconnect the wire from the oil pressure sensor. 4. Set the piston of the 1st cylinder to the TDC position of the compression stroke (see “Installing the piston of the 1st cylinder to the TDC position of the compression stroke”). 5. Drain the coolant (see “Replacing the coolant”). 6. Remove the thermostat (see “Removing and installing the thermostat”). 7. Disconnect the exhaust pipe of the muffler from the exhaust manifold (see “Replacing the exhaust pipe of the muffler”). 8. Remove the air filter (see “Removing and installing the air filter”). 9. Remove the front cover of the camshaft drive belt (see “Replacing the camshaft drive belt on VAZ 2108, VAZ 2109, VAZ 21099 cars and adjusting the belt tension”). 10. Remove the cylinder head cover (see “Adjusting the clearances in the valve drive”).

11. Secure the camshaft gear from turning by inserting a screwdriver into its hole and resting it against the pin; loosen the camshaft gear mounting bolt (for clarity, the operation is shown on a VAZ 2108, VAZ 2109, VAZ 21099 engine removed from a vehicle).

12. Remove the drive belt from the camshaft gear, tension roller, water pump toothed pulley, move the belt to the side (see “Replacing the camshaft drive belt on VAZ 2108, VAZ 2109, VAZ 21099 cars and adjusting the belt tension”).

13. Unscrew the camshaft gear mounting bolt and remove it together with the washer (for clarity, the operation is shown with the engine removed).

14. Using two screwdrivers, remove the gear from the camshaft. At the same time, do not damage the camshaft oil seal (for clarity, the operation is shown on a VAZ 2108, VAZ 2109, VAZ 21099 engine removed from a car).

15. Loosen the clamp and disconnect the fuel supply hose to the fuel pump. 16. Disconnect the hoses and wires, the choke rod and the throttle cable from the carburetor (see “Removing and installing the carburetor”).

17. Disconnect the central high-voltage wire from the ignition distributor cover.

18. Use a screwdriver to press out the spring clip and disconnect the block with low-voltage wires from the ignition distributor terminal. 19. Disconnect the tube from the vacuum corrector of the ignition distributor. 20. Disconnect the vacuum booster hose from the engine inlet pipe. 21. Loosen the clamp and disconnect the radiator supply hose from the water cooling jacket pipe (see “Removing and installing the cooling system radiator”).

22. Loosen the clamp and disconnect the heater supply hose.

23. Loosen the clamp and disconnect the heater outlet hose.

Signs of a broken gasket on a VAZ 2109

There are no regulations for replacing the gasket, since a good and well-made part can serve for quite a long time until the head is dismantled. But it is necessary to monitor its condition, and the difficulty is that damage to the gasket rarely manifests itself externally. Oil drips and antifreeze drips may not always indicate gasket damage. But there are a number of unconditional signs that the gasket needs urgent replacement.

Suspension in the engine crankcase. This is determined by checking the oil level. Instead of clear or even dark oil, a watery, dark brown suspension appears on the control dipstick. The coolant can be forced into the lubrication system, where it mixes with the oil, but the mixture may not be homogeneous and looks like a suspension. The first sign of antifreeze leakage into the crankcase is an increasing oil level.
Oily spots in the coolant expansion tank. The same story - oil got into the antifreeze, but it cannot dissolve there, so it looks like stains on the surface. This is also a signal that the gasket is broken.
A drop in compression in a particular cylinder or in two adjacent ones. Most often this happens when the gasket is simply of poor quality and burns out in the place where the cylinder is sealed. It can burn out anywhere, along the perimeter of the combustion chamber - both outside the block and into the channels. External burnout can be heard immediately by sound. Therefore, such a nuisance must be eliminated immediately.

Puff

Reassembling the unit if you strictly follow the instructions for dismantling work will not pose any particular problems.

An incredibly important aspect of replacing the cylinder head gasket and all other activities associated with removing the head is the correct adjustment and tightening of the bolts.

Tightening the bolts is done strictly with a torque wrench, which will allow you to control the tension torque.

Here are some guidelines for using this specialized wrench and checking the current tension condition:

Place the holder in the zero position. This will indicate that now the key data is equal to the moment of the original position;
Look at the torque tool readings as you begin to tighten the bolts;
Rotate the holder, monitor the indicators;
If the torque does not change, the fastener may be stretchable, which is normal. This is exactly what should happen;
If the torque increases rapidly, bolt movement should be achieved. That is, the stretch of the holder is small, it needs to be stabilized.

How to replace the VAZ 2109 block gasket

Replacing the cylinder head gasket of a VAZ 2109 is carried out according to the same scenario as on the eight, on VAZs of the tenth series, since the engine designs of these cars differ very slightly from each other. We will present the procedure for replacing the gasket schematically, since there is no need to describe the unscrewing of each bolt, and everyone has a Murzilka in the glove compartment. We will dwell only on the most important points that cannot be neglected in order to avoid failure of the entire motor.

The gasket is replaced as follows:

We remove the terminal from the battery, drain the antifreeze, maybe not completely, if it is in normal condition. Drain the oil if antifreeze gets into it.
We disconnect the wires from the sensors, remove the thermostat, air filter, timing cover, and disconnect the exhaust pipe of the muffler.
We align the shafts and gears strictly according to the marks, remove the timing belt, disconnect all the hoses and wires from the carburetor and remove it.
We remove the cooling system pipes and the timing cover, and then unscrew the cylinder head mounting bolts. After this, carefully remove the head from the car.

How to remove the cylinder head on a VAZ 2109. Replacing the cylinder head gasket with your own hands

The cylinder head (cylinder head) is usually removed to replace the gasket or block, or to repair the valve mechanism of the piston group or the head itself.
The need to remove the cylinder head may also arise in the case of engine tuning or complete disassembly of the engine. This work is carried out on an inspection pit or overpass.

How to remove the cylinder head on a VAZ 2109 - step-by-step instructions:

Disconnect the negative terminal from the battery.
Drain the coolant into a plastic container.
Disconnect the exhaust pipe from the exhaust manifold.
Now remove the receiver together with the throttle assembly (VAZ 2111), or the carburetor in the case of (VAZ 21083), as well as the intake and exhaust manifolds (remove the cylinder head without removing the manifolds).
On a VAZ 2111, you need to disconnect the “mass” wires (they are attached to the left end of the head), remove the fuel rail with fuel pipes and injectors.
Disconnect the high-voltage wires from the spark plugs, as well as the connectors of the coolant temperature and oil pressure level sensors.
On the VAZ-21083, you will additionally have to remove the housing of the auxiliary units, the ignition distributor sensor and the fuel pump.
Now remove the timing belt, then the tension pulley, spacer washer and camshaft timing pulley.
Unscrew the rear fastening nut that secures the timing cover to the cylinder head.
Remove the cylinder head cover.
Using a Phillips screwdriver, loosen the clamps and disconnect all the hoses from the cylinder head exhaust pipe one by one.

12. Unscrew the 10 cylinder head mounting bolts using a “10” hexagon.

13. Remove the screws and washers.

14. Now you can remove the cylinder head along with the gasket.

15. When disassembling the valve mechanism, place a wooden block under the valve plate that you are going to dry out.

16. Dry the valve.

17. Remove it from the cylinder head guide sleeve.

18. Take the key at “13” and unscrew the two fastening nuts on the outlet pipe.

19. Remove the gasket and pipe.

Assembling and installing the cylinder head is carried out in the reverse order.

The valve stems and bushing guides are lubricated with engine oil.
Before starting installation, it is necessary to thoroughly clean the surface of the cylinder block from dirt and oil, as well as remnants of the old gasket.
The cylinder head gasket is replaced using two special centering bushings.
Now you can install the mounting screws and tighten them in four steps according to the diagram below.

The first tightening of the screws is carried out with a torque of 20 N.m (2 kgf.m);

The second - with a moment of 69.4–85.7 N.m (7.1–8.7 kgf.m);
Third - extension by 90°;
The fourth is to turn the screws 90°.

Now you know how to remove the cylinder head on a VAZ 2109; at this point, replacing the cylinder head gasket with your own hands can be considered complete.

Installing the gasket and assembling the VAZ 2109 engine

The worst is over. Now it remains to find out the reasons for the burnout of the gasket or breakdown between the channels. Most likely, the gasket itself is to blame, but you need to be prepared for unpleasant exceptions. The fact is that if the gasket worked for some time in a broken state, cavities could form on the mating surface of the cylinder block or head. Therefore, before changing the gasket on a VAZ 2109, it is imperative to carefully examine the mating surfaces. Otherwise, a new gasket will last for a week and we will continue to change them ad infinitum.

If the surfaces are in order, lubricate the new gasket with a special heat-resistant sealant, carefully studying the instructions. Sealants are different, and application methods are different. Every self-respecting nine-wheel driver should know the procedure for tightening the cylinder head bolts by heart, but just in case, we have shown it in the picture. It is advisable to take into account the torque when tightening. If you have a torque wrench, great. Then we tighten the bolts the first time with a torque of 2 kgf/m, the second time with a torque of 8 kgf/m, and after that we press them in the same order by a quarter turn.

This is how the head gasket is changed on a nine and an eight. Every time you check the oil level in the engine, be sure to pay attention to its condition, and then your nine will run for many more years. Buy good gaskets, and good luck on the roads!

Stages of work

As we have already said, the replacement process is not complicated, but if you decide to take on it for the first time, then it is better to invite someone with experience in this matter to help. You may also need help if you decide to improve the performance of the VAZ 2109 engine by tuning it using channel boring. Replacing the plugs also requires additional assistance. In this case, removing old plugs and correctly installing new ones requires certain skills.

Tools

Need for replacement

It is necessary to change the cylinder head gasket on a VAZ 2114 every time it is dismantled, regardless of the reasons that caused it. It is disposable and cannot be reused as this may damage the engine.

The gasket must meet the following requirements:

have elastic deformation;
be water- and oil-proof;
resistant to hot gases;
resistant to chemical influences;
retain their properties for a long time.

If it burns out, it cannot perform its functions and should be replaced.

There are several signs by which you can determine the need for replacement:

The smell of exhaust gas or antifreeze in gasoline.
Oiling of antifreeze.
A large amount of emulsion on the cap from the oil filler neck into the engine.
Increased oil level in the sump.
Lots of white steam coming out of the muffler.

Dismantling the cylinder head on a VAZ 2109. Algorithm for replacing the cylinder head gasket yourself

It is necessary to remove the cylinder head (cylinder head) when replacing the gasket, block, as well as when repairing the piston group mechanism and its valves or when repairing the head itself. In addition, when tuning the engine or completely disassembling it, you also need to dismantle the cylinder head.

Before starting work, it is necessary that the car is installed on an overpass or inspection hole.

Removing the cylinder head on a VAZ 2109

Disconnect the negative terminal from the battery.
Drain the coolant into a plastic container.
The exhaust pipe should be disconnected from the exhaust manifold.
Remove the receiver with the throttle assembly (VAZ-2111). You also need to dismantle the carburetor (VAZ 21083), intake and exhaust manifolds (but you can do without this).
If the work is performed on a VAZ 2111, you need to disconnect the “mass” wires attached to the left end of the head. Remove the fuel rail with fuel pipes and injectors.
Disconnect the high voltage spark plug wires. Then we disconnect the coolant sensor connectors and remove the oil pressure level.
On the VAZ-21083 the housing of the auxiliary units must be removed.
Next, the housing of the auxiliary units, the distributor sensor, and the fuel pump are dismantled.
First remove the timing belt. Then remove: the tension roller and the spacer washer. Next, you need to remove the camshaft timing pulley.
Unscrew the rear mounting nut securing the timing cover to the cylinder head.
Remove the cylinder head .
Use a Phillips screwdriver to loosen the clamps, then you need to disconnect the hoses from the cylinder head exhaust pipe one by one.

Unscrew the 10 bolts that secure the cylinder head using a 10mm hexagon.

Remove the screws and washers.

Remove the cylinder head with gasket.

Also check out

When disassembling the valve mechanism, it is necessary to place a wooden block under the valve plate.

Dry the valve. Remove it from the cylinder head guide bushing.

Using a key “13”, unscrew the 2 nuts securing the inlet pipe.

Remove the gasket and pipe.

Assemble and install the cylinder head in the reverse order.

Recommendations :

Valve stems with engine oil. The same applies to guide bushings.
Before installation, remove dirt, oil, and remnants of the old gasket from the surface of the cylinder block.
The cylinder head gasket should be replaced using two special centering bushings.
Install the mounting screws; the diagram below shows 4 steps on how to tighten them.

The first tightening torque of the screws is 20 N.m (2 kgf.m);
The second - with a moment of 69.4–85.7 N.m (7.1–8.7 kgf.m);
The third - with an extension of 90°;
The fourth is to turn the screws 90°.

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Removing the cylinder head and replacing the cylinder head gasket on VAZ 2108, 2109, 21099

Hello, in this article you will learn how to remove the cylinder head (cylinder head) and how to replace the cylinder head gasket with your own hands on a VAZ 2108, 2109, 21099. Replacing the cylinder head gasket occurs if you discover that antifreeze, antifreeze or oil is leaking in those places where the cylinder head and the cylinder block itself are connected. Of course, there is another option that the leak occurs not because of a worn gasket, but because of the head itself, which was deformed, as a result of severe overheating of the engine. Before you begin removing the cylinder head, you must remove the terminal from the battery and drain the antifreeze from the cylinder block. Then remove the terminal from the antifreeze temperature sensor