GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

    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.


    Object Number: 40675  Size: MH
  1. Inspect the engine mounts for the following conditions:
  2. • Damaged rubber portions
    • Heat check cracks covering the rubber surface
    • The rubber cushion separated from the mount plate
    • A split through the center of the rubber cushion
  3. Raise and suitably support the vehicle. Refer to SECTION 0A.
  4. Remove the engine mount through-bolts and the nuts.

  5. Object Number: 40680  Size: SH
  6. Raise the engine with a jacking fixture.
  7. Remove the engine mount bolts and mounts

  8. Object Number: 40678  Size: MH
  9. Remove the engine bracket bolts. and brackets.

Installation Procedure


    Object Number: 40678  Size: MH
  1. Install the engine brackets and bolts.

  2. Object Number: 40680  Size: SH
  3. Install the engine mounts and bolts.
  4. Tighten
    Tighten the engine mount and bracket bolts to 58 N·m (43 lb ft)

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Lower the engine.

  6. Object Number: 40675  Size: MH
  7. Install the engine mount through-bolts and nuts.
  8. Tighten

        • Tighten the engine mount through-bolts to 95 N·m (70 lb ft).
        • Tighten the engine mount through-bolt nuts to 80 N·m (59 lb ft).