Excessive Engine Vibration

• Motor mounts help to keep a vehicle's engine anchored securely inside the engine compartment. Bad motor mounts, especially broken motor mounts, frequently allow a vehicle's engine to move or shake excessively, causing excessive engine vibration, which often gets transmitted into the passenger compartment of the vehicle.
  
  

Misaligned Engine Block

• A vehicle's engine is supported and aligned by motor mounts, which ensure that all sides of a vehicle's engine are equal in height. When motor mounts go bad, they often break and allow one side of a vehicle's engine to sag or droop, sometimes excessively, in relation to the opposite side.
  
  

Engine Damage

• In extreme cases, bad motor mounts can totally lose their structural integrity and allow a vehicle's engine to shift excessively to one side, especially during rapid engine acceleration or at high rates of speed, which can allow various mechanical engine parts, including pumps, pulleys, and diaphragms to contact the vehicle frame and break.
  
  

Broken Belts/Hoses

• In addition to broken engine parts, bad motor mounts can cause damage to an engine's belts and hoses. If bad motor mounts allow excessive engine movement or tilting, various engine fan belts and/or radiator hoses can be damaged or broken, especially under heavy engine acceleration when engine movement is most pronounced.
  
  

Excessive Engine Noise

• Many times bad or broken engine motor mounts will cause loud or excessive engine noise, usually knocking or clanking types of noises. These types of engine noises are usually the result of the engine block pounding or bumping against the broken or damaged motor mounts that have lost their snug fit against the engine.