An internal combustion engine consists of several parts. This is the head, block and sump. When the engine is running, a huge amount of thermal energy is released. To cool it, a coolant shirt is provided in the blocks. The motor also needs lubrication. She moves through special channels. So that these two components do not mix with each other, calcination is provided. In today's article, we will talk about how to replace the cylinder head gasket on a VAZ-2107 car . We also consider the signs of this malfunction.
When do i need to change?
Note that the replacement of the cylinder head gasket on the VAZ 2101-2107 with their own hands is made infrequently. The manufacturer does not regulate the period of its replacement, since the part is installed for the entire period of operation. However, there are times when it burns out.
How to determine this malfunction? The first sign is the motor overheating. The second is to leak at the junction of the block and the head. From here can run both antifreeze and oil. Also, these two fluids are mixed in the expansion tank. When the engine is running, there are small gas bubbles in it. All these signs indicate that the car requires a replacement gasket under the head. VAZ "Classic" - a simple car in the device. Therefore, such a procedure can be done independently.
Instruments
What do we need to replace? In the course of work, we need the following tools:
- The key is 10.
- A set of heads with a diameter of 13, 17 and 19 millimeters.
- Vorotok-rattle.
- Extension cords.
- Torque wrench.
- Tank for draining the coolant.
- Screwdrivers.
Disassembly
So, where does the VAZ-2107 car begin to replace the cylinder head gasket? First remove the air filter with a round metal casing (shown in the photo below).
Then they unscrew and take out the carburetor. After that, they begin to dismantle other attachments. This is the ignition distributor and high voltage wires. After that, coolant is drained from the engine. A clean container of at least 7 liters is required.
Merge antifreeze correctly
On a VAZ-2107 car, replacing the cylinder head gasket is relatively quick. However, most of the operation will take the discharge of old antifreeze. The fact is that on the “classic” there is no faucet familiar to everyone for draining. It has its own “traffic jam”. How to perform this procedure correctly? So, we need a capacity and a meter of rubber hose with a diameter of at least 1 centimeter. At one end we bring it to the drain plug. The other side quickly lean the hose against the hole. So the antifreeze will pour into our tank. You need to be careful so as not to spill antifreeze on your hands.
What's next?
How is the cylinder head gasket VAZ-2107 replaced further? In the next step, we need to dismantle the valve cover . It is mounted on 8 bolts. It is important not to lose the pressure washers - they will still be useful to us during assembly. The next step is to remove the timing element, namely the chain drive and gear. To do this, weaken the tensioner and use the key to release the locknut. The chain should now loosen. Now disassemble the gear.
It is attached to the camshaft on a lock washer. Using a screwdriver and a hammer, bend the stopper and unscrew the element outward. By the way, the chain does not have to be completely removed. The main thing is that she does not fall down. To do this, she is tied up with an improvised tool (for example, wire).
How is the cylinder head gasket replaced further? VAZ-2107 continues to stand still, and we proceed to dismantle the camshaft. To do this, unscrew the 9 fixing bolts. After disconnecting the exhaust pipe, which goes to the exhaust manifold. It is mounted on 4 brass nuts. If your pipe is screwed onto ordinary steel pipes, there is a risk of breaking the stud. Be extremely careful. In the presence of rust or dirty coating, use the universal lubricant VD-40.
Remove the head
Now we have to remove the block head. To do this, we take a powerful winch in our hands and unscrew 10 fixing bolts in a circle. An important point is that the 11th bolt is installed at low tide. It is small in size. We also extract it. Gently pry the element and get it out.
Installation
So, in front of us is an open block head. All that remains for us is to remove the old gasket and install a new one in its place. It is important to thoroughly clean the surface of its contact. If this is not done, through small channels the oil will seep into the adjacent chamber and mix with antifreeze. Experts recommend using a special spray.
It is called "to remove gaskets." Its cost is about 400 rubles. A volume of 300 ml is enough for several doses. The instructions for use are quite simple. It is necessary to apply a spray to the surface of the block and after ten minutes remove the remaining elements with a clean piece of rags.
The new gasket already has a red silicone sealant. We can only establish it in its rightful place. Using two guides, we center the element in the block. Now it remains only to assemble the engine.
Assembly
Pay attention to such a moment as the tightening of the cylinder head. Much will depend on this operation. If the force is not respected, the gasket will burn out, and the engine may boil. Therefore, experts recommend using a torque wrench (see figure below).
Bolts are tightened in a special pattern - from the middle to the edges. The force of the first puff is 4.1 kgf per meter. The second is 11.45. This is for ten big bolts. What about the little 11th? Here, the tightening rate is 3.8 kgf / m. If your key is designed for the Nm parameter, the first puff requires a value of 40 units. The second is produced with a force of 95 to 117 Nm. After the cylinder head gasket was replaced on a VAZ-2107 car, it is required to install
the camshaft and
split gear back. It is important to tune the timing drive. Yes, on the 8-valve engine, the pistons will not come in contact with the "plates". However, there will be significant misfire (to the point that the engine simply does not start). On this, the replacement of the cylinder head gasket VAZ-2107 was successfully completed. You can make the first start and check the operation of the motor. Do not forget to pour antifreeze into the system.
Conclusion
So, we found out how the VAZ-2107 cylinder head is disassembled and assembled. Spare parts for VAZ (especially if it is a classic model such as the "seven") are cheap. Therefore, such an operation as replacing a block gasket can be performed for quite budgetary money (up to 500 rubles). Of course, provided that you do the procedure yourself. The most important thing is the tightening of the bolts. Do not perform this procedure by eye. You either will not reach a bolt, or will tear off a hairpin. It will be very difficult to remove the latter (unless you grab it with welding and carefully unscrew it along the thread).