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What is an engine mount?

What is an engine mount?

Often overlooked, the engine mount, also known as the engine silent block, is an essential part for absorbing vibration and ensuring the long life of your vehicle's engine components. The engine mount is one of many silent blocks in your vehicle. Its shape varies from one vehicle model or make to another. The number of silent blocks also varies. If defective, it can damage your vehicle's engine and related equipment or parts. What is an engine mount? And what is it used for?

What is an engine mount used for?

As the name implies, the engine mount supports the engine. It also acts as a shock absorber, absorbing the vibrations caused by the engine's operation. In fact, the engine mount is essentially made up of two materials: rubber and metal. The rubber absorbs shocks, while the metal supports the weight of the engine. The metal resists the force and torque generated by the engine, and the rubber absorbs and dampens vibrations. Since engines generate a considerable amount of vibration during normal operation, if there's a problem with the engine mounts, the increase in vibration can usually be quite noticeable.

Engine mounts keep your engine securely attached to the chassis in the engine compartment so that it won't shift when cornering, going up or down a hill, or driving on uneven terrain. Because engine mounts are under constant stress, it's not surprising that they deteriorate in a high-mileage vehicle. Some models may seem more susceptible to poor engine mounts, but this can happen to any vehicle if you own it long enough or drive it over rough terrain.

In order for an engine to remain stable while delivering power to the wheels, it's necessary to use engine mounts or engine brackets. Whether you have an efficient four-cylinder hybrid or a powerful V8 in your van, engine mounts are virtually identical in design and application.

There are several types of engine mounts

  • The classic engine mount:Consists of an elastic part and 2 metal parts connected to the chassis and engine. This type of engine mount is rather rigid and therefore cannot provide much engine movement.
  • Anti-tilt engine mounts:This type of engine mount comes in two forms. The first is a large cylindrical silent block with a metal spacer in the center. The second consists of a connecting rod with the spacer in the center and an elastic block on either side. With this type of silent block, the entire weight of the drivetrain rests on the engine mount. Positioned horizontally, the engine mount supports the transmission on one side and the engine on the other.
  • Hydraulic Engine Mount:Consisting of 2 chambers filled with pressurized fluid, the hydraulic engine mount provides the best possible absorption of engine movement and vibration.

Note: Your car has several silent blocks located in different places, but always performing the same shock-absorbing function. There are anti-roll bar mounts, exhaust mounts, engine mounts, control arm mounts, and so on.

How long do engine mounts last?

In general, engine mounts last a very long time, sometimes the whole life of the vehicle. However, depending on the conditions of use, they may wear out as the miles accumulate. To avoid excessive damage or serious safety issues, it's a good idea to have engine mounts inspected to make sure they don't need to be replaced. If left unrepaired, a broken engine mount can cause further damage to your engine and its components.

When should a motor mount be replaced?

It is imperative that a failed engine mount be replaced. Depending on the source of the symptom, the mechanic will replace a specific motor mount. He will certainly advise you to replace the other engine mounts, even if they show no signs of failure, as it is recommended to replace all engine mounts at the same time. It's also a good idea to replace a motor mount after it has reached its service life, which experts say is about 150,000 km.

Symptoms of a defective engine mount

Symptoms vary depending on the degree of wear on the engine mount(s). Symptoms may include vibration and/or noise (squeaking, rattling, etc.), bucking, etc. If these symptoms are not taken seriously quickly, some parts of your vehicle may be damaged. In extreme cases, the engine being supported may fall over.

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