GM Service Manual Online
For 1990-2009 cars only

Front Engine Mount

    Notice: Broken or deteriorated mounts can cause misalignment and destruction of certain drive train components. When a single mount breaks, the remaining mounts are subjected to abnormally high stresses.

    Notice: When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal, or the crankshaft pulley. Due to the small clearance between the oil pan and the oil pump screen, jacking against the oil pan may cause the pan to be bent against the pump screen. This will result in a damaged oil pickup unit.

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Inspect for loose or missing bolts at the following locations:
  3. Replace the mount if any of the following conditions exist:
  4. • The engine mount to the engine
    • The engine mount to the engine mount frame bracket through-bolts
    • The engine mount frame bracket to the frame
  5. Replace loose or missing bolts. Refer to Engine Mount Replacement .

  6. Object Number: 374320  Size: SH

    Notice: When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal, or the crankshaft pulley. Due to the small clearance between the oil pan and the oil pump screen, jacking against the oil pan may cause the pan to be bent against the pump screen. This will result in a damaged oil pickup unit.

  7. Using a jack on the square tab at the rear of the engine block (left side shown the right side requires removal of the starter) raise the engine in order to complete the following tasks:
  8. • Remove the weight from the engine mount
    • Place a slight tension on the rubber cushion
    • Observe the engine mount while raising the engine
  9. Replace the mount if the following conditions exist:
  10. • Hard rubber surface covered with heat check cracks
    • The rubber cushion separated from the metal plate of the mount
    • The rubber cushion is split through the center
  11. Lower the vehicle.