Exhaust manifold gasket replacement: device, circuit and features

The exhaust manifold (VC) of the car engine is part of the exhaust system. Its role is to collect combustion products from all cylinders and, combining them, transfer them to the receiving tube. From there they will go to the catalyst, and after it - to the muffler.

The exhaust manifold is attached to the cylinder head of the power unit (cylinder head). The tightness of this joint is ensured by a special gasket. Due to the constant temperature loads, it sometimes breaks down. And although such a malfunction does not pose a serious threat to the engine, it is better to eliminate it immediately after detection.

на примере автомобилей отечественного производства ВАЗ. In this article, we will look at how the replacement of the exhaust manifold gasket is carried out using the example of VAZ-produced domestic cars. But first let's figure out what the VC is and how to determine that it's time to change its seal.

Features of exhaust manifold design

Structurally, the exhaust manifold consists of several pipes, one of which is connected to one. Its geometric shapes and mountings for each engine are different. The VC is usually made of high-carbon cast iron or steel. Its side, which is attached to the cylinder head, has a certain shape corresponding to the arrangement of the exhaust ports. The connection of the manifold to the cylinder head of the VAZ cars is provided by special pins screwed into its body. Their number depends on the form of VC.

Gasket

The laying of the collector is made by stamping from asbestos. This material is perfectly suited for these purposes: it has excellent resistance to high temperatures, is strong enough, and is also capable of contracting, ensuring tightness of the connection. For greater strength, VC seals can be reinforced with steel.

How long is the exhaust manifold gasket

The exhaust manifold gasket does not apply to those elements whose replacement is stipulated in the maintenance schedule. It can serve for two years, and five, and ten. Her condition does not depend on age and mileage. The only factor that affects the duration of its service is the correct operation of the engine. If it works in the standard mode, it does not overheat, uses good fuel, the gasket will serve for a long time. If, on the contrary, it can burn out after three months of operation.

Signs of burnt VK gasket

The signs of a burnt gasket can be:

• Change the sound of the engine running;
• The appearance in the passenger compartment of a characteristic smell of exhaust gases;
• A violation of the stability of the engine, a burning CHECK lamp on the dashboard.

As for the sound of the power unit, then with a burnt gasket, a typical "chirring" is usually heard. In such cases, it is said that the engine "cuts". This sound creates exhaust gases, escaping at the place of damage to the seal. Naturally, the exhaust from under the hood gets into the cabin through the heating and ventilation system. This creates additional inconvenience to the driver and passengers, moreover, poses a certain threat to their health, therefore in any case replacement of the exhaust manifold gasket with its damage is a compelling necessity.

In cars with injection engines, whose operation is controlled by the electronic control unit (ECU), if the integrity of the gasket on the dashboard is broken, the CHECK lamp may light up. This is due to the fact that the lambda probe installed on the manifold itself or the intake pipe captures the change in the amount of oxygen in the exhausts and transfers the signal to the computer. Until the fault is eliminated, the controller forces the engine to run in emergency mode.

How much does the repair cost of a maintenance station

What is the cost of replacing the exhaust manifold gasket? на данный вид работ зависит от типа двигателя (карбюраторный, инжекторный, 8-клапанный, 16-клапанный), модели самого уплотнителя, а также расценок станции техобслуживания, где вы планируете ремонтировать свой автомобиль. The price for this type of work depends on the type of engine (carburetor, injector, 8-valve, 16-valve), models of the seal itself, as well as the prices of the maintenance station where you plan to repair your car.

On average, the work itself together with the sealer costs somewhere in the amount of 1500 rubles.

But it is not necessary to spend money for work. Replacement of the VAZ exhaust manifold gasket without special difficulties can be performed on its own. Especially if you have a set of hand tools, and you have at least the slightest idea of the design of the engine of your car.

What will it take to repair

предполагает использование следующих средств: The replacement of the exhaust manifold gasket assumes the use of the following:

• A set of spanner keys ;
• Slotted and Phillips screwdrivers;
• A sharp knife or spatula (to remove the old gasket);
• Capacity with a wide neck volume of at least 5 liters (for draining the coolant);
• Anti-rust agent (WD-40 or the like);
• Dry rags.

Important: replacing the gasket of the exhaust manifold 2114, as well as other models of the VAZ, provides for the preliminary draining of the cooling liquid. Otherwise, you risk flooding the engine's intake ports.

Replacement of a lining of a final collector VAZ 2114

The algorithm for performing the work for the "fourteenth" model of "Samara" is as follows:

1. The machine is installed on the inspection pit or overpass, dismantle the engine protection, drain the coolant.
2. We remove the negative terminal of the battery.
3. Dismount the air filter housing.
4. Disconnect the accelerator cable and the fuel pipes from the throttle assembly.
5. We disconnect plugs of the gauge of a throttle valve and regulator of idling.
6. We disconnect hoses of ventilation картера, the amplifier of brakes from a receiver.
7. We dismantle the receiver itself, we disconnect the connectors of the wires of the injection control unit.
8. We remove the fuel rail (do not unscrew the nozzles).
9. Detach the intake pipe from the VC.
10. We dismantle the intake manifold, and after it the exhaust manifold.
11. We remove the old gasket.
12. Using a knife (spatula), gently clean the mating surfaces of the collector and cylinder head.
13. We install a new gasket.
14. We perform the installation in the reverse order.
15. Fill the coolant to the desired level.

Change the gasket of VC to VAZ 2110

выполняется в следующем порядке: The exhaust manifold gasket 2110 is replaced in the following order:

1. We put the car on the flyover (observation pit), remove the protection, be sure to drain the coolant.
2. We de-energize the on-board auto network by disconnecting the negative terminal from the battery.
3. Dismount the air filter.
4. We disconnect from a receiver a hose of the amplifier of brakes, the pneumo-valve cover, a regulator of pressure of fuel.
5. Turn off the throttle sensor, idle speed regulator.
6. Disconnect the air line, turn off the air flow sensor.
7. We disconnect from a throttle branch pipe of hoses of ventilation картера.
8. We remove the underwater and drain hoses of the cooling system from the collector.
9. We dismantle the receiver assembly with the throttle assembly.
10. We unscrew 5 nuts of fastening and we remove an input collector.
11. We unscrew the bolts (3 pcs.), Which fix the exhaust manifold to the intake pipe.
12. Dismantle the VC.
13. We remove the old gasket or its remaining fragments.
14. We clean the joints on the manifold and on the cylinder head.
15. We install a new gasket.
16. We install dismantled elements.
17. Do not forget to pour the antifreeze antifreeze.

выполняется практически по тому же алгоритму, что и для «четырнадцатой». As you can see, for VAZ 2110, the replacement of the exhaust manifold gasket is carried out practically according to the same algorithm as for the "fourteenth" one. The main thing, do not forget to drain the coolant.

Replacement of the exhaust manifold gasket: "Niva"

Replace the gasket on the "field" will not be particularly difficult. The order of the work is as follows:

1. First, start the first nine items from the section for VAZ 2110.
2. Remove the front and rear support bracket fixing bolts to the exhaust pipe. Remove the front bracket, take the rear to the side so that it does not interfere.
3. Remove the fuel rail with injectors.
4. Remove the front eyebolt mounting nut and remove it.
5. Unscrew the nuts fixing the heat shield of the intake pipe, remove it.
6. Remove the two upper and then the upper two nuts securing the intake manifold to the cylinder head.
7. Using the extension for the handle of the key, unscrew the two remaining (lower) nuts.
8. Remove the intake manifold.
9. Remove the heat shield of the starter.
10. Remove the "mass" wire fixing nut to the cylinder head. Remove the conductor tip.
11. Remove the three VK mount nuts and disassemble it.
12. Remove the seal, peel the bond surfaces and install a new gasket.
13. Install the removed parts in the reverse order, pour in the coolant.

How to extend the life of the gasket

не требует особых затрат и вполне может быть успешно осуществлена в условиях собственного гаража, кому хочется тратить на это свое время? Although replacement of the exhaust manifold gasket does not require special expenses and can be successfully implemented in the conditions of own garage, who wants to spend time on it? Better let him serve longer. And in order to extend its service life, listen to the following tips:

• Monitor the condition of the cooling system, check the antifreeze level to prevent engine overheating;
• Use only high-quality fuel;
• Check the tightness of the cylinder head and exhaust manifold connections;
• If you find out the integrity of the gasket, do not wait until it burns completely, replace it;
• Buying the exhaust manifold gasket, choose a quality product from well-known manufacturers.