The procedure and torque for tightening the cylinder head on a VAZ 2109 - pulling diagram

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

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.

REPAIRING THE CYLINDER HEAD FOR A VAZ 2109 WITH YOUR OWN HANDS

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 from the gasket. But there may be others that can cause the engine to overheat or even seize.

Any 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 more and more popular, thanks to which the power of the car increases. You can do tuning yourself if you have experience in such work. Working with valves and cylinders requires special knowledge and skills.

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.

Golden rules of tightening

To properly reassemble the cylinder head, you need to adhere to the golden rules:

• Strictly follow the tightening torque data corresponding to the VAZ 2109;
• Make adjustments only using a torque wrench. Other tools do not allow you to get the desired result;
• To install the cylinder head, use only serviceable bolts that meet the requirements of your engine installed on the VAZ 2109;
• Before work, make sure that the holders are in good condition.

Checking the bolts

Tightening diagram

In addition to observing the required tightening torques for the cylinder head mounting bolts, one more rule must be observed here.

Returning the bolts to their places is carried out strictly according to the diagram below.

Tightening sequence

Next, do the work according to the table, and you will do everything right.

Tightening is performed in four circles, following the sequence of work with the mounting bolts indicated in the diagram.

Make sure your bolts meet the specifications before following the instructions and diagram. Otherwise, even the most correct, strictly observed tightening will not give any result.

What is a cylinder head

Cylinder head for VAZ 2109 in disassembled condition

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.

When is it time to change?

• There may be a need to replace or repair the cylinder head if you begin to notice that fuel consumption has increased or the power of the power plant has decreased.
• Incorrect assembly and installation of valves and cylinders can also lead to malfunctions in the cylinder head system.
• If you constantly fill your car with low-quality gasoline, then do not be surprised that over time this system will begin to malfunction and will need to be repaired.
• A crack that appears in a block cannot be eliminated in any other way than by completely replacing this element.
• A symptom indicating problems in the cylinder head may be white smoke coming from the exhaust pipe, this is caused by antifreeze getting into the engine cylinders.

White smoke from the exhaust pipe

• If oil stains appear on the surface of the coolant in the tank, this also indicates that repair of the unit is necessary. This is due to the fact that oil, in one way or another, began to get to places where it should not be.
• Not often, but sometimes exhaust gases begin to break through the gasket. There is no other choice but to dismantle the head and replace the gasket.
• Removing the head may be necessary in the case of VAZ 2109 tuning, modifications, problems with plugs, tightening bolts or boring cylinders.

Also check out

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

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

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

1. Remove the gasket and pipe.

Assemble and install the cylinder head in the reverse order.

Recommendations :

1. Valve stems with engine oil. The same applies to guide bushings.
2. Before installation, remove dirt, oil, and remnants of the old gasket from the surface of the cylinder block.
3. The cylinder head gasket should be replaced using two special centering bushings.
4. 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°.

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 proceeding with the removal and repair of the VAZ 2109 cylinder head, it is necessary to carry out some preparatory work in accordance with the order.

Removal

• First of all, remove the air purifier housing.
• Disconnect the hoses and wires from the carburetor or injector.
• Next, you need to disconnect the pants from the manifold.
• We remove the distributor.
• Unscrew the valve cover.
• Remove the carburetor and manifolds.
• To unscrew the head bolts on a VAZ 2109, you will most likely need a wrench and a hexagon, because the bolts are tightened with decent force.

Pipe as a lever

• Remove the head mounting bolts and washers.

We take out the bolts

• We remove the VAZ 2109 cylinder head from the power plant unit.
• We remove the gasket.

Gasket that has expired and needs to be replaced

• Also, if necessary, we carry out repairs or modifications to engine block components.

Tuning

Qualified adjustment, modification and tuning of the VAZ 2109 head will help to fully reveal the capabilities of your power unit. You've probably heard a lot about this, read or even watched videos on the Internet. Typically, when tuning, the channels are bored and smoothed, thereby reducing the turbulence that reduces power. The valves are changed to larger ones and ground into the seats. Tuning may also involve replacing standard valve guides with bronze ones.

Valve lapping

Lapping control is carried out as follows:

1. the assembled head lies on its side;
2. liquid is poured into the collector holes (ordinary water can be used).

If the liquid does not flow through the valves, this means that the work was done efficiently and the valves were ground in correctly. After all faults have been eliminated, you can begin installing the head.

Installation

• Begin assembly by installing a new gasket. Attention! The holes in the gasket must coincide with the guides, which are located at the corners of the block.

New gasket

• You need to install the head carefully, do not move the gasket from its place at this moment.
• We insert the bolts into their places and begin tightening with a torque wrench.

Tightening with a torque wrench

• Next, we install the dismantled equipment, injector or carburetor, in reverse order. Fresh coolant is added. Wires and hoses are connected.

Attention! This operation requires some knowledge and skills. Therefore, before performing it, you should know that the bolts need to be tightened according to a certain pattern and with a certain force. It would be useful to read additional material on this topic and watch video instructions.

Reinstalling the head

Now you can carefully install the cylinder head in its place, making sure that at this moment the gasket does not slip out or move to the side. Of course, the guides fix it, but you should still be extremely careful.

Next, we will need a torque wrench, since the bolts will have to be tightened with a certain torque. It is also worth keeping in mind that the tightening order must be observed. The diagram below shows the sequence in which to twist:

Now regarding the force with which it is necessary to tighten the bolts. This should be done in 4 steps:

1. First, a torque of 20 Nm
2. Second reception with a torque of 75-85 Nm
3. Tighten each bolt another 90 degrees.
4. Finally turn it 90 degrees.

After this, all that remains is to install all the equipment removed from the car, fill in the coolant, connect all the sensors, wires and hoses and check the work done. Usually everything becomes visible immediately after pouring antifreeze. If wet marks appear at the junction of the head and block, you can take everything back and do the whole job again! But I hope that this will not happen in your practice! Happy renovation!