GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN 46109 Engine Front Cover Installation Guide Pins

Removal Procedure


    Object Number: 1663951  Size: SH
  1. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement.
  2. Remove the front exhaust manifold pipe. Refer to Exhaust Manifold Front Pipe Replacement.
  3. Disconnect the engine harness electrical connector (2) from the oil level sensor.

  4. Object Number: 1663953  Size: SH
  5. Loosen the oil pan bolts (1).
  6. Remove the oil pan (2) and discard the oil pan gasket.
  7. Clean and inspect the oil pan, if necessary. Refer to Oil Pan Cleaning and Inspection.

Installation Procedure


    Object Number: 1373497  Size: SH
  1. Completely fill and slightly overfill the oil pan seal groove with a continuous bead of RTV sealant. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.
  2. Ensure the RTV sealant is higher than the oil pan sealing surface (1) by 3 mm (0.118 in).

  3. Object Number: 1373533  Size: SH
  4. To prevent shifting of the oil pan, install one EN 46109 into the bolt hole in each side of the lower crankcase.
  5. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1663953  Size: SH
  6. Position the oil pan (2) to the lower crankcase and finger start the oil pan bolts (1).

  7. Object Number: 204292  Size: SH
  8. Tighten the oil pan bolts.
  9. Tighten

    1. Tighten the bolts a first pass to 8 N·m (71 lb in).
    2. Tighten the bolts a final pass to 12 N·m (106 lb in).

    Object Number: 1663951  Size: SH
  10. Connect the engine harness electrical connector (2) to the oil level sensor.
  11. Install the front exhaust manifold pipe. Refer to Exhaust Manifold Front Pipe Replacement
  12. Fill the engine oil. Refer to Engine Oil and Oil Filter Replacement