GM Service Manual Online
For 1990-2009 cars only

Object Number: 2491  Size: SH

    Notice: Broken engine mountings can cause misalignment of certain drive-train components. Misalignment of drive-train components causes eventual destruction of the drive-train components.

    If one engine mount breaks, the rest of the engine mounts will have increased stress put on them. This could cause the rest of the engine mounts to break.

  1. Inspect for loose or missing bolts at the following locations:
  2. • Engine mount to the engine
    • Engine mount frame bracket to frame
    • Engine mount to engine mount frame bracket
  3. Replace missing or loose bolts. Refer to Engine Mount Replacement - Left Side or Engine Mount Replacement - Right Side .
  4. 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. Lifting the engine in an unapproved manner may cause component damage.

    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.

  5. Using a suitable engine lifting device hooked to the eyelet on the accessory mounting bracket, raise the engine in order to complete the following tasks:
  6. • Remove weight from the engine mount.
    • Place a slight tension on the rubber cushion.
    • Observe the engine mount while raising the engine.
  7. Replace the engine mount if the following conditions exist:
  8. • Heat check cracks cover the hard rubber surface.
    • The rubber cushion is separated from the metal plate of the engine mount.
    • There is a split through the rubber cushion.