What Are Motor Mounts And Their Common Types?

Motor mounts are a common type of component found in automobiles or machines that contain engines and chassis, and they are installed in assemblies for the means of absorbing shock, vibration, and noise. Having such byproducts of operation mitigated is important for the health of a system to uphold optimal operating values and prevent an early breakdown. With various types of motor mounts being available, it can be difficult to determine which may be best for your needs. To help in this endeavor, we will provide a brief overview of the most common options and their unique uses.

Solid Rubber Engine Mounts

Solid rubber engine mounts, also known as transmission mounts, are those made from solid rubber cushions that are bolted onto the engine transmission and chassis. Utilizing solid rubber is beneficial to ensure strength while remaining flexible for shock absorption. With their positioning against the engine, they can secure the assembly in place while mitigating any shock, vibration, or noise. One of the benefits of solid rubber mounts is their low price-point, though it is important to know that they can crack and tear if incorrectly installed.

Hydraulic Motor Mounts

Hydraulic motor mounts are filled with a fluid gel or liquid, and they are implemented within assemblies to absorb any engine vibration before it has the chance to reach the chassis. Hydraulic motor mounts are most often found in automotive, marine, and construction applications, and they are generally chosen over solid rubber options when noise needs to be kept at a minimum. Additionally, hydraulic motor mounts are more expensive, but this is balanced out by their exceptional performance.

Electronic Motor Mounts

Electronic motor mounts are a bit more advanced than other options, capable of carrying their stiffness and damping features to tackle a variety of noise and vibration levels. Such mounts employ the use of sensors so that monitoring and feedback can be achieved with a control system, and this is what allows such mounts to function well in a number of settings. Generally, the counter shake mechanism of electronic motor mounts is made possible through components like vacuum actuators.

Metal Motor Mounts

Metal motor mounts are used when a strong and secure connection is needed between the engine and chassis, and they can also withstand heavy loads while transferring power to the wheels of an automobile. While metal motor mounts are known for their ample strength and rigidity, their lack of flexibility and metal-on-metal contact leads to increased noise and vibration when compared to the other various common options.

Polyurethane Motor Mounts

Polyurethane mounts are an alternative to conventional solid rubber options, known for their longer-lasting service lives and increased benefits. Despite this, polyurethane motor mounts can face certain issues as a result of their lower heat resistance, and the bonding between components may be harder to achieve. Nevertheless, there are many applications in which polyurethane options excel.


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