Automobile engines are secured within the vehicle through a system of metal and rubber mounts that hold the engine in place yet allow a small amount of movement to help reduce engine noise and vibration. Over time these engine mounts become worn, and eventually they can fail entirely. When this happens, there are some classic symptoms which appear and indicate engine mount replacement is necessary.
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Engine mounts are responsible for securing an engine to the frame or chassis of an automobile while still allowing a small amount of movement. Worn or broken motor mounts allow excessive amounts of movement which can cause the engine to come into direct contact with the bumper wells or other metal surfaces. This contact creates loud clunking or rattling noises upon acceleration and deceleration.
A broken engine mount can allow the engine to twist or rock back and forth when it is placed under a load. This twisting or rocking motion can cause the connections between the engine exhaust manifolds and the exhaust system to crack or separate, resulting in exhaust leaks. These leaks produce excessive exhaust noise and may allow exhaust gases to enter the passenger compartment of the vehicle.
Damaged Hoses/Belts/ Radiator
The excessive engine movement created by broken engine mounts places stress on components, such as radiator hoses, belts and wire connectors. If the movement of the engine is severe enough, the result will be failed hoses, snapped belts and broken wire connectors. The engine may also move forward, allowing the fan to contact the radiator, which can cause severe damage to the cooling system.
Sticking/Binding Shifter or Accelerator
The twisting or rocking movement caused by broken engine mounts can cause binding in throttle and shifter linkages that make shifting between gears and depressing the accelerator difficult. In severe instances the movement of the engine can cause the accelerator to open unexpectedly and result in sudden vehicle acceleration.
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