Do-it-yourself replacement of an engine mount on a VAZ 2109: fault diagnosis and everything you need to replace the mounts

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Engine mounts on VAZ 2109 cars are responsible for reducing and eliminating vibrations emanating from engine operation and transmitted to the car body.

Every motorist should be able to replace them with his own hands. There is nothing complicated in working with supports, but competent repairs can significantly extend the life of the car and get rid of quickly annoying vibrations and noise.

Element appearance

Features of the pillows used

There are several nuances that you should know about the supports in general, as well as about the engine mounts used on the VAZ 2109 model.

When developing the design of supports that serve to reduce engine vibrations, manufacturers take into account the loads absorbed by the supports;
These elements are under constant influence of loads, the magnitude of which varies;
One constant load is the weight of the engine. But when the car starts, another load arises;
When the car moves in reverse, the supports take on negative forces;
When sharply accelerating or braking, when a wheel hits a pothole, or when hitting an obstacle, these same negative forces arise. The front, rear and side engine mounts are responsible for extinguishing them;
To make cushions for the VAZ 2109, special natural rubber, high-grade SKI-3 rubber is used. In addition to rubber components, the supports include steel elements and heavy-duty adhesive;
The VAZ 2109 engine mounts are capable of withstanding temperature loads in the range from -40 to +70 degrees Celsius.

In order for the pillows to meet all the requirements for them, experts recommend choosing products from the manufacturer or companies that were recommended by the VAZ 2109 manufacturer.

Additional engine support

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VASA March 24, 2008
Hello everyone! I want to share my experience of installing an additional engine mount in order to warn everyone against a bad result. I have a 15. The engine, of course, is a regular 8-valve engine. The car is two and a half years old. Mileage 44,000. I switched to it after 20 years of classics. (It should be noted that my cars were always in excellent condition) And naturally, I immediately didn’t like the fact that when I started, the gearshift knob ran away from me. So I decided to install an additional engine support.

The thing is generally useful. The machine acquired solidity and smartness. The handle doesn't twitch. (by the way, I also redid the rocker. I wrote about this earlier in the topic “Song of the gearshift lever” https://lada-forum.ru. opic=2066&st=40 drawing on page 3)

BUT ! This is what happened. Bracket for support, on the engine, mounted on the studs of the manifolds (suction and exhaust of the 1st cylinder)

So these studs, or rather the threads in the head of the block, are not designed for such a load. I don’t know, maybe I’m just unlucky, but the aluminum alloy from which the heads of modern domestic cars are cast is just some kind of crap! With a regular wrench, the thread breaks off in one go.

So here it is. About six months ago, I was doing the next maintenance and saw that the top pin had been torn off. Well, thank God the hole is deep (43 mm) and the threaded part of the standard stud is 25 mm. I took the longest hairpin, twisted it deeper and calmed down.

And about a month ago, the gasket under the manifold blew. I took it apart and AFIGEL! This is the first time I've seen this.

I don’t know why, but at the exhaust port of the 1st cyl. The gasket has moved almost 12mm. It burned out and tore between the exhaust and suction ports.

I assume that it shifted and broke when the support pulled out the pin. Carbon monoxide began to enter the injector receiver... Hence the loss of power... (Which I also wrote about earlier.)

I had to cut a 10mm thread in the head, and made a 10mm/8mm adapter pin.

The bottom pin was simply replaced with a long one.

I RECOMMEND ! To everyone who will install such a support. IMMEDIATELY change the studs to LONGER ones.

I repeat! The standard stud has a 25mm thread. ! And the metal is very soft! And the load is very heavy.

What influences the replacement

There are two main factors that force motorists to replace airbags.

Natural wear and tear. Each pillow has its own service life, exceeding which is very rare. Often they don’t work it out for the second reason.
Mechanical impacts leading to breakdowns. These are our roads, potholes, accidents, collisions with manholes, etc.

When replacement is required

There are several factors you should know about replacing engine components.

Situation	Peculiarities
Body vibration	If you feel vibration in the body, you should definitely check the condition of the supports. This effect can be caused by various reasons, but pillows are one of the main
Replacing the timing belt	When replacing a belt, removing its cover can be very difficult, since the engine is almost tightly pressed to the right mudguard of the front wheel. You have to remove the pillow in order to fully carry out repairs.
The engine sags, loads the CV joints	Due to the impact of the engine weight on CV joints, their geometry changes, which leads to a significant reduction in the service life of the elements. The resource is reduced, it is necessary to carry out replacements ahead of schedule
There is a knocking noise in the backstage area	It may be barely noticeable. But its presence indicates that the engine has sagged. Consequently, the supports do not work properly and need to be replaced

If you do not replace the supports in a timely manner, this will lead to more serious consequences and expensive repair of the breakdown. Therefore, it is better to replace the pillows when primary signs of wear are detected. To do this, we additionally recommend periodic inspection of the unit.

Ways to increase the rigidity of engine fixation on the body of a VAZ 2109

To prevent the VAZ 2109 cushion from being replaced frequently, and to increase the rigidity of the power unit, instead of the standard support, a more advanced part is installed, which has a rigid body and a rubber part inside.

Minimize the movement of the motor when braking, hitting bumps on the roads, or abruptly starting the car. With its help, you can avoid self-switching off the transmission. Increase the resource in the exhaust system and drive the drive wheels. Improve the design of the engine compartment. You can increase the rigidity of the motor by installing an additional fourth support . Its purpose is to connect the clutch housing to the cross member of the front suspension of the VAZ 2109. When installing the device, it is necessary to install a new bracket and find a place for the ignition module. The work procedure includes: Dismantling the VP for spark plugs. Disconnecting the wire connectors from the ignition module of the car. Disconnecting the clutch housing of this module from the cylinder block. The remaining three nuts securing the module are unscrewed, which is then removed. The ignition module takes a different place and new fasteners are installed. A bracket for mounting the fourth support is attached to the cross member of the front suspension. A bolt is installed in the hole on the terminal clamp, the nut is placed and screwed initially by two turns. The lower head of the rod is inserted into the support fixing eye. The bolt is installed in the eye and support, the nut is tightened. The size of the rod is adjusted until the holes in the clutch housing and on the upper head coincide. Another bolt is installed.

Replacement

Now we move on to replacing elements. Doing it yourself or contacting a car service is purely your personal decision.

For the VAZ 2109, the use of three supports is provided:

Front;
Rear;
Left side.

The replacement of each of them should be discussed separately, since the processes differ from each other.

Replacing the rear cushion

Find a suitable place to carry out repairs. You will need a pit or overpass.
Place the car there, secure it with stops, and put the car on the handbrake.
Disconnect the negative terminal from the car battery.
Using a 17mm spanner, unscrew the nut that holds the cushion to the body.
Using a 17 socket, remove the mounting nuts of the support bracket to the gearbox. There are 3 of them in total.
Remove all the bolts and remove the old engine mount.
Install a new motor element and reassemble the unit.

Dismantling works

Side left pillow

Left element

Provide yourself with free access to the bottom of your VAZ 2109.
Secure the vehicle with jack stands and the handbrake.
Disconnect the minus from the battery.
Remove the left engine splash guard.
Using a 17mm spanner, remove the nut that holds the cushion to the body.
Using a 17 socket, unscrew the 3 mounting nuts of the support bracket, removing them from the gearbox.
After removing the mounting bolts, replace the worn engine mount with a new one.
Carry out the reassembly procedure. Stick to strict consistency.

Replacing the front airbag

Here, follow all the same conditions that were relevant for previous works. That is, drive the car into a pit, place supports and turn off the power to the car by removing the negative terminal from the battery.

Using a 17mm spanner, remove the nut holding the cushion to the body.
Using a 17mm wrench, remove the 4 fastening nuts securing the airbag to the engine.
Remove the rubber element from the eyelet.
Place a new support in place of the old unit.
Reassemble the unit.

When replacing engine mounts, be sure to make sure that the new mounts meet the quality and size requirements. It is also recommended to thoroughly clean the seats before installing a new element, which will extend the service life of the new motor mounts.

Replacement does not require special skills, special tools or special conditions. Therefore, VAZ 2109 owners often change the pillows with their own hands. But if you are not confident in your abilities, contact a trusted car service center.

How to increase the rigidity of the VAZ 2109 engine fixation

Tuning support for the VAZ 2109 power unit

Minimize the movement of the motor when braking, hitting bumps on the roads, or suddenly starting the car.
With its help, you can avoid the transmission switching off automatically.
Will increase the resource in the exhaust system and drive wheels.
Improve the design of the engine compartment.

You can increase the rigidity of the motor by installing an additional fourth support. Its purpose is to connect the clutch housing to the cross member of the front suspension of the VAZ 2109. When installing the device, it is necessary to install a new bracket and find a place for the ignition module.

Components for the fourth support of the VAZ 2109 power unit

The work order includes:

Dismantling the VP for spark plugs.
Disconnecting the wire connectors from the car's ignition module.
The clutch housing of this module is disconnected from the cylinder block.
The remaining three nuts securing the module are unscrewed, which is then removed.
The ignition module takes a different place and new fasteners are installed.
A bracket for mounting the fourth support is attached to the cross member of the front suspension.
A bolt is installed in the hole on the terminal clamp, a nut is placed and screwed on initially two turns.
The lower head of the rod is inserted into the support fixation eye.
The bolt is installed in the eye and support, and the nut is tightened.
The size of the rod is adjusted until the holes in the clutch housing and on the upper head match.
another bolt is installed.

Installation of the fourth airbag for VAZ 2109

Through the spacer sleeve located on the support, the head of the rod and the clutch housing guard are fixed.
All bolts are well tightened.
The bracket is secured.

The rigidity of the engine installation on the mountings is a guarantee of the durability of the VAZ 2109 power unit.

Cushions under the car's engine will help reduce the force of vibration or even eliminate these disturbances that may occur on the body of the VAZ 2109. The material for their manufacture is rubber, and the elements are also used to reduce noise, which can be caused by a running engine. It is good for any car owner to be able to do this work with their own hands.