Do-it-yourself repair of the cylinder head on a VAZ 2109

According to many years of experience of various car enthusiasts, replacing the cylinder head of a VAZ 2109 is most often associated with problems arising with the gasket. But there may be others that can cause the engine to overheat or even seize.

Every driver can repair and modify the cylinder head on a VAZ 2109, but special tools and a little knowledge of the operating principle of this unit are required. Recently, tuning of this unit has become increasingly popular, due to which the power of the car increases. Carrying out tuning yourself is possible if you have experience in such work. Working with valves and actuators requires specialized knowledge and skills.

When is it time to change?

When replacing or repairing a cylinder head, you may begin to notice that fuel consumption has increased or the unit's power has decreased.
Also, improper assembly and installation of valves and cylinders can lead to malfunctions in the cylinder head system.
If you constantly fill your car with low-quality gasoline, do not be surprised that over time this system will begin to malfunction and will require repairs.
The resulting crack in the block cannot be repaired except by completely replacing the element.
A sign of a problem in the cylinder head may be white smoke coming from the exhaust pipe, caused by coolant entering the engine cylinders.
If there are oil stains on the surface of the coolant in the tank, the unit requires repair. This is due to the fact that the oil somehow began to get where it shouldn’t.
It is rare, but it happens that exhaust gases begin to penetrate through the gasket. In this case, there is no other option but to remove the head and replace the gasket.
For VAZ 2109 tuning, restoration, problems with spark plugs, forging bolts or boring cylinders, disassembling the cylinder head may be required.

White smoke from the exhaust pipe

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

hexagon;
torque wrench;

Torque wrench

knob;
screwdriver.

Process

Before you begin disassembling and repairing the VAZ 2109 cylinder head, it is necessary to perform certain preparatory work in sequence.

Removal

First of all, remove the air purifier housing.
Disconnect the hoses and lines from the carburetor or injector.
After this, you need to disconnect the pants from the manifold.
Remove the grinding wheel.
Unscrew the valve cover.
Remove the carburetor and manifolds.
To unscrew the head bolts on a VAZ 2109, most likely you will need a gate and a hexagon, since the screws are screwed in with decent force. Tube as a lever
Remove the cylinder head bolts and washers.
We remove the VAZ 2109 cylinder head from the power unit.
Remove the gasket. A gasket that has reached the end of its life and needs to be replaced.
In addition, if necessary, engine block components are repaired or modified.

The pipe is like a lever.

Remove the screws.

A gasket that has reached the end of its service life must be replaced.

Tuning

Proper adjustment, modification and tuning of the VAZ 2109 head will help to fully reveal the capabilities of your power unit. You've probably heard about it, read a lot, or even watched videos on the Internet. Typically tuning is done by boring and aligning the bores, which reduces turbulence and reduces power. The valves were replaced with larger ones and ground into their seats. Tuning may also include replacing the standard valve guides with bronze ones.

Valve lapping

The following is a check of the running-in process:

the assembled head is on its side;
the collector holes are filled with liquid (ordinary water can be used).

If fluid does not leak through the valves, the job is done well and the valves are lapped properly. After eliminating all defects, you can proceed to assembling the head.

What is a cylinder head

The cylinder head on a VAZ 2109 in a disassembled state.
The VAZ 2109 cylinder head is a special unit whose main purpose is to close the cylinders. It is attached directly to the block itself using special bolts. The cylinder head is important because it is a direct participant in numerous processes during engine operation. The cylinder heads of power units of cars produced today are distinguished by a rather complex structure and are assembled from a significant number of parts.

Ridiculous cases

If the engine seizes, signs of thickened oil may indicate sugar entering the system. Similar consequences occur when stirring a raw egg, which, when the motor is running, will certainly heat up and weld all the channels. How the latter substance enters the system is known only to the owner of the car.

Sugar can be poured into the fuel by ill-wishers through the refueling hatch. There are many substances that change the composition of the oil. It happens that a driver may mistakenly pour a mixture that is lethal to iron into the engine neck.

A malfunction where coolant penetrates into the oil can also lead to jamming of the rubbing metals. This can be noticed when measuring the level using the dipstick. The changed composition is noticeable to the eye and to the touch: by color, viscosity, and the presence of foam. A whitish tint indicates a loss of oil quality.

Also check

When removing the valve train, place a block of wood under the valve plate.

Enter the valve. Remove it from the cylinder head guide sleeve.

Unscrew the 2 nuts securing the inlet pipe using the “13” wrench.

Remove the gasket and pipe.

Reassemble and install the cylinder head in reverse order.

Recommendations :

The valve is connected to the engine oil. The same applies to guide bushings.
Before installation, remove dirt, oil, and old gasket remnants from the surface of the cylinder block.
Replacing the cylinder head gasket is then followed by two special central bushings.
Install the mounting screws, the diagram below shows 4 ways to tighten them.

The first tightening torque is 20 nm (2 kgf);
The other is with a torque of 69.4–85.7 Nm (7.1–8.7 kgf);
The third is with 90° coverage;
Fourth, turn the screws 90°.

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What kind of oil should I use and how much?

Owners of the VAZ 21099 (and its modifications with 1.3 and 1.5 liter engines) often fill in semi-synthetic oils with a viscosity of 10W-40. A smaller part (but still there is one) prefer to use synthetics with a 5W-40 class.

The manufacturer recommends maintenance every 15,000 km. In practice, owners try to change the engine oil at 8-10 thousand. If you choose something in between these numbers, it will be the “Golden Mean”, but of course everyone decides for themselves.

When purchasing, be guided by a filling volume of 4 liters, because... the engine consumes a little more than 3 liters at a time. Do not forget to leave at least 0.5 liters for daily monitoring and, if necessary, topping up the level in the engine.

The choice of a particular company is not important; for “Ninety-Ninth” you can buy both oils from the middle and low price ranges. Here are some of the many products on sale today.

G-energy 10w40;
Totachi Touring 5w40;
Sibi MOTOR 5W40;
Motul 5W40 300V;
Eni i-sint 10w40 and many others.

Along with the fluid, the oil filter also needs to be changed. Today, many manufacturers are available for sale at low prices.

0 451 103 274 BOSCH ~$4;
2108-1012005 AG Auto Parts ~ $1.5;
2108-1012005 WIX ~ 2.5$;
MANN W914/2 ~ 5$;

... and a large number of other filters that can be found on the Internet today.

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°.

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.