Replacing the exhaust manifold gasket on a VAZ-2114 is a very complex procedure and requires certain knowledge and experience. So, not all experienced car enthusiasts are able to do this correctly. In addition to the fact that exhaust gases exit through the exhaust manifold, it is also responsible for the normal operation of the engine, since a lambda probe is installed on it.
Video about replacing the exhaust manifold gasket on a VAZ-2114
The video will tell you how to properly replace the exhaust manifold gasket, and also tell you about some of the subtleties and nuances of this process.
Required tool for replacement
Before you begin the process itself, you need to decide on the necessary tools. So, what will you need: a ratchet and sockets for 17, 19; screwdrivers with flat and Phillips tips; a set of keys and the gasket itself.
Now that everything is prepared, you can start working directly. In order for the manifold to be removed without any problems and rusted bolts not to create trouble, everything must be lubricated with WD-40 before performing the operation. It is advisable to do this several times. Before performing the operation, you need to think again, weigh everything and calculate your strength.
Step-by-step instructions (algorithm with photo)
If, nevertheless, the car enthusiast makes up his mind, then we will consider step-by-step instructions for replacing the gasket:
- Remove the negative terminal from the battery.
Remove the terminal from the battery - We remove the accelerator cable. Removing the throttle cable
- We are dismantling the fuel pipes.
More precisely, they need to be disconnected and taken to the side. Remove the fuel pipes shown in the photo - Disconnect the throttle position sensor connector.
We disable the TPS - Disconnect the idle air control wire connector.
Disable the IAC sensor - Unscrew the crankcase ventilation pipes and brake booster.
Unscrew the pipes shown in the photo - We are dismantling the receiver.
Dismantling the receiver - Remove the wires of the injection control unit (injectors).
- We dismantle the fuel rail without dismantling the injectors.
Removing the fuel rail - Remove the thermal shield from the manifold.
Removing the heat shield - Disconnect the exhaust pipe.
Dismantling the exhaust pipe - Remove the intake manifold.
Removing the intake manifold - After unscrewing the fastening nuts, remove the exhaust manifold.
Unscrew the fastening nuts and remove the exhaust manifold - We are replacing the gasket.
We are replacing the gasket - We carry out the assembly in the reverse order.
As you can see, the replacement of the intake and exhaust manifold gaskets takes place simultaneously and, by and large, is the same gasket material.
Part selection
21083-1008081 – original catalog number of the gasket for the intake and exhaust manifold. It consists of two parts or, on newer models, one. This part is produced at the AvtoVAZ plant. The average cost is 250 rubles per piece (if there are two of them) or 450 rubles (for a whole one).
One-piece manifold gasket Gasket that consists of two parts
In addition to the fact that there is an original part, you can also find a number of analogues that are recommended for installation. Let's consider which gaskets can be installed under the VAZ-2114 manifolds:
- Trialli GZ 102 0013 is a well-known Russian manufacturer that produces a wide range of analog parts for domestically produced cars. The cost of the gasket is 200 rubles per piece.
- AJUSA 13065200 is another domestic manufacturer that has won consumers over the quality of its products. The cost of the product is 450 rubles.
- Ukrainian also produces and supplies this gasket. But, if you look at it, the quality of the product leaves much to be desired, since the resource is designed for only 20,000 km.
Causes of malfunction
Bent valves due to incorrect valve timing
When all processes have been considered, you can proceed directly to determining the reasons for the failure of the manifold gasket. So, let's look at the main ones:
- Wear . During operation, the car emits hot gases that destroy the surface of the gasket, as a result of which it can tear or delaminate.
- Since there is only one gasket for the intake and exhaust manifolds, gasoline entering through the first channel can get on the gasket, which also affects the integrity and structure of the material from which it is made.
- The quality of the part is not always high, even original, so when choosing, you should pay special attention to this.
Tips for replacing the intake manifold
Also, do not neglect the procedures for repairing and cleaning the intake manifold. The stability of the VK is very important for the normal functioning of the car. A certain vacuum is formed in the intake manifold, which is the source of drive force for many systems: cruise control, windshield wipers, vacuum brake booster. In the event of a collector malfunction, this threatens the failure of one or more of the above systems.
To avoid the appearance of cracks and distortions, you must use a torque wrench to tighten the nuts on the manifold and follow the tightening order of 20.9-25.8 (2.13-2.63) N_m (kgf_m). As a rule, it is recommended to start tightening the nuts from the center and gradually move towards the periphery, alternately tightening the nut on one side or the other.
To work on removing and replacing the VAZ 2114 intake manifold on an 8-valve engine, we will need:
- keys “for 8”, “for 10”, “for 13”, “for 17”;
- “cardan” type nozzle and socket heads “17”, “19”;
- magnetic screwdriver;
- screwdrivers, pliers;
- new intake manifold.
By the way, the price for an intake manifold from a VAZ (article 21110100801420) will be 1,350 rubles.
The cost is indicated for spring 2022 in Moscow and the region.
Loosen the clamp and disconnect the crankcase ventilation hose.
When is it necessary to replace and remove the exhaust manifold on a VAZ-2114
Huge temperature changes are the main problem faced by the exhaust manifold and the gasket, for which it is removed. The collector itself is made of a special grade of cast iron; it can withstand high temperatures (up to 800-900 degrees) , however, these are critical values, after which the collector may warp or crack.
Exhaust manifold VAZ-2114
Its main task is to collect exhaust gases and distribute them into the exhaust pipe of the muffler.
Replacing or dismantling the VAZ-2114 exhaust manifold is necessary in the following cases:
- Mechanical damage to the collector.
- Warping and loss of tightness at the junction with the cylinder head.
- Burnout of the gasket between the head and the manifold.
- The appearance of cracks as a result of engine overheating.
- Replacing the collector with a device of a different configuration, adapted to a more severe operating mode.
In the event that we are not going to participate in high-speed races for the prize of the head of the regional traffic police, replacing or dismantling the collector may be necessary in a number of cases.
Tools and materials for dismantling
There are a number of symptoms that will indicate that you need to prepare to remove the exhaust manifold:
- increased noise level in the engine compartment , the engine produces a characteristic, loud sound in any operating mode;
- breakthrough of exhaust gases into the engine compartment and sometimes into the cabin;
- reduction in engine power due to a mismatch between the exhaust gas outlets in the cylinder head and in the manifold.
Many people decide to replace the standard manifold with a “tuning” one, made of stainless steel and having a different configuration, thereby wanting to increase engine power and reduce the resistance that the standard manifold provides to exhaust gases. As a rule, the most common reason for dismantling a unit is gasket burnout .
Exhaust manifold gasket
The manifold gasket on the VAZ-2114 is made of pressed reinforced asbestos and is designed to ensure a tight connection between the block head and the manifold flanges. Asbestos is used to correct the coefficient of thermal expansion of the aluminum alloy from which the head is cast and the cast iron from which the manifold is cast. At high speeds and under prolonged loads, the gasket may burn out. Then its replacement and dismantling of the collector are inevitable.
To dismantle the manifold, you will need a standard set of tools, a set of sockets with extensions, and WD-40 penetrating lubricant or its equivalent. In case of broken studs, a stud extractor, drill, drill bits and a set of taps will be useful. A day or two before dismantling the collector, it is worth moistening all the fasteners several times, this will significantly simplify the removal procedure .
Causes of malfunctions
The key factor that causes 90% of exhaust manifold malfunctions on VAZ 2114 cars is high temperature and poor quality materials from which the parts are made. During operation, the steel repeatedly heats up and cools down, which leads to the appearance of cracks in the body. This is a common occurrence for VAZ cars older than 7-8 years.
Auto repair shops offer crack welding services using argon welding. However, for a number of reasons, this activity is useless for cars older than 7 years.
1) Just removing and installing the exhaust manifold will cost about 2.5 thousand rubles. Taking into account the work of the welder and other actions, the cost of repairs can be 4-5 thousand rubles. If you do the work yourself, buying a new part will cost less.
2) Welding, even argon welding, disrupts the structure of “tired” metal. A boiled part rarely lasts longer than a year, after which new holes appear. The older the car, the faster the problem returns, and the collector has to be removed again.
If the car is older than 8 years and there are problems with cracks in the manifold, it is better to remove the part and replace it with a new one.
Manifold dismantling procedure - step-by-step instructions
The dismantling process itself is not so complicated; access to some nuts is difficult, so it is advisable to carry out the work on a lift or in an inspection pit. The algorithm of actions for the injection VAZ-2114 in this case looks like this:
- Remove the negative terminal from the battery or turn off the mains switch.
Remove the terminal from the battery - Drain the antifreeze from the system.
This point should not be neglected, despite the fact that the factory does not oblige you to empty the cooling system of liquid. Drain the coolant from the system - Disconnect the fuel pipes.
Removing the fuel pipes - We find the throttle position sensor, idle speed sensor and remove the wires from them.
Disabling the throttle position sensor - We remove the crankcase ventilation hoses and the hose from the vacuum brake booster.
Unscrew the pipes - We dismantle the receiver, disconnect the injector wires and remove the fuel rail assembly. We dismantle the receiver. We disconnect the electrical connector of the fuel rail. We dismantle the fuel rail.
- We get full access to the collector.
We dismantle the thermally reflective screen. Removing the thermal shield - Unscrew the muffler exhaust pipe from the manifold.
Disconnect the muffler exhaust pipe from the manifold - Unscrew the manifold mounting nuts from the studs in the block head.
Dismantling the exhaust manifold mountings - We dismantle the collector.
Removing the exhaust manifold
Replacement of gaskets and installation of manifold
After dismantling the manifold, it is rarely possible to remove the gasket intact. It changes in any case , but parts of the destroyed gasket will definitely remain on the mating plane on the head side and on the manifold side. They must be carefully removed.
Changing the manifold gasket
To do this, you can use a special spray that softens the gasket residues; you can carefully remove them with a blade. In this case, the plane must not be damaged, otherwise the tightness of the connection will be broken.
Also, when installing new exhaust manifold gaskets, it is not recommended to use sealants . They can be of different quality, and during crimping they can form particles that get into the crankcase, which is extremely undesirable.
Video about replacing the exhaust manifold gasket on a VAZ-2114
Preparation stages
To replace the manifold or its gasket, in any case you will have to dismantle the VK. But before you get to the element you are looking for, you will first need to go through some preparatory steps. Namely, tighten the fasteners, and then remove the air filter and carburetor if the first stage does not help.
We recommend: Oil leakage from under the crankshaft oil seal: causes and troubleshooting
All dismantling work must be carried out only on a cold engine. To make it easy to unscrew all fasteners, you can pre-treat them with WD40, several hours or even a day before the repair begins.
What does a faulty collector affect?
There are many stories about the rupture (and even explosion) of a cracked manifold while the car is moving.
Of course, none of them are true, but nevertheless, a leaky manifold is a very serious problem that requires an immediate solution, and here’s why: through burnouts and cracks, air can enter the exhaust system, diluting the exhaust gases.
As a result of this, the lambda sensor will incorrectly determine their composition and incorrectly adjust the composition of the fuel-air mixture injected into the engine, which will lead to tripping, a drop in speed and carbon deposits on the spark plugs.
Bent valves due to incorrect valve timing
These same cracks will affect the crankcase ventilation, disrupting it. This will lead to timing problems and increased valve wear. And finally, exhaust gases escaping through the burnouts will enter the engine compartment and, partially, into the interior, causing unpleasant odors and discomfort during trips.
A severely burnt manifold gasket can lead to exactly the same consequences as cracks on the part itself.
