GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 41476 Front and Rear Cover Alignment Tool

Removal Procedure


    Object Number: 1507244  Size: SH
  1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .
  2. Remove the water pump. Refer to Water Pump Replacement .

  3. Object Number: 1704624  Size: SH
  4. Remove the front cover bolts (1).
  5. Remove the front cover (2) and gasket (3).
  6. Discard the front cover gasket.

  7. Object Number: 1704625  Size: SH
  8. Remove the oil seal (4).
  9. Remove the bolts (1, 6), camshaft position sensor (2), and wire harness (5).
  10. Remove the O-ring (3) from the sensor as required.

Installation Procedure


    Object Number: 1481463  Size: SH
  1. Apply a 5 mm (0.2 in) bead of sealant 20 mm (0.8 in) long to the engine block. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number. Apply the sealant directly onto the tabs of the front cover gasket that protrude into the oil pan surface.

  2. Object Number: 1704624  Size: SH

    Important: 

       • Do not use the crankshaft oil seal or the engine front cover gasket again.
       • Do not apply any type of sealant to the front cover gasket, unless specified.
       • The special tool in this procedure is used to properly align the engine front cover at the oil pan surface and to center the crankshaft front oil seal.
          - All gasket surfaces should be free of oil or other foreign material during assembly.
          - The crankshaft front oil seal MUST be centered in relation to the crankshaft.
          - The oil pan sealing surface at the front cover and engine block MUST be aligned within specifications.
          - An improperly aligned front cover may cause premature front oil seal wear and/or engine assembly oil leaks.

  3. Install the front cover gasket (3), front cover (2), and bolts (1).
  4. Tighten the cover bolts finger tight. Do not overtighten.

  5. Object Number: 1507244  Size: SH
  6. Install the oil pan-to-front cover bolts. Hand tighten the bolts. Do not over tighten.

  7. Object Number: 451712  Size: SH

    Important: Align the tapered legs of the tool with the machined alignment surfaces on the front cover.

  8. Install the J 41476 . Align the tapered legs of the J 41476 with the machined alignment surfaces on the front cover.
  9. Notice: Refer to Fastener Notice in the Preface section.

  10. Install the crankshaft balancer bolt. Hand tighten the bolt. Do not over tighten.
  11. Tighten

    1. Tighten the oil pan-to-front cover bolts to 25 N·m (18 lb ft).
    2. Tighten the engine front cover bolts to 25 N·m (18 lb ft).
  12. Remove the J 41476 .

  13. Object Number: 1402111  Size: SH
  14. Inspect the camshaft position sensor O-ring seal (704) for cuts or damage. If the seal is not cut or damaged, it may be used again.
  15. Lubricate the O-ring seal with clean engine oil.
  16. Install the O-ring seal onto the sensor (703).
  17. Install the sensor to the cover.
  18. Install the camshaft position sensor wire harness (737) and bolts (705, 738).
  19. Tighten
    Tighten the bolts to 12 N·m (106 lb in).

  20. Install the water pump. Refer to Water Pump Replacement .
  21. Install the new crankshaft front oil seal. Refer to Crankshaft Front Oil Seal Installation .