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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Engine Front Cover Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. If replacing the engine front cover, install the camshaft position sensor to the engine front cover.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the camshaft position sensor bolt.

    Tighten:  Tighten the bolt to 10 N.m (89 lb in).

    3. Fig 1: Camshaft Position Sensor
    GM153587Courtesy of GENERAL MOTORS CORP.
  3. If replacing the engine front cover, install the oil pump cover and gear set to the engine front cover. Refer to Oil Pump Cover and Gear Set Replacement .
    4. Fig 2: Identifying Oil Pump Cover & Gear Set
    GM153600Courtesy of GENERAL MOTORS CORP.
  4. If replacing the engine front cover, install the water pump.
    5. Fig 3: Water Pump & Engine Front Cover
    GM46177Courtesy of GENERAL MOTORS CORP.
  5. Install and tighten the water pump bolts.

    Tighten: 

    • Tighten the long water pump bolts to 34 N.m (25 lb ft).
    • Tighten the short water pump bolts to 22 N.m (16 lb ft).

    6. Fig 4: Removing/Installing Oil Filter Adapter & Pressure Relief Valve
    GM406042Courtesy of GENERAL MOTORS CORP.
  6. If replacing the engine front cover, install the pressure relief valve, the oil filter adapter and the oil filter adapter bolts to the engine front cover.

    Tighten: 

    1. Tighten the bolts to 15 N.m (11 lb ft).
    2. Use theJ 45059  to rotate the bolt an additional 50 degrees.

    7. Fig 5: Removing/Installing Oil Filter Adapter & Pressure Relief Valve
    GM406042Courtesy of GENERAL MOTORS CORP.
  7. Install the new engine front cover gasket. Ensure that the sealing surfaces are not damaged.
    8. Fig 6: Engine Front Cover Gasket
    GM97758Courtesy of GENERAL MOTORS CORP.
  8. Apply sealer GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the bolt threads.
  9. Align the cogs on the crankshaft sprocket with the cogs on the oil pump gear set in the engine front cover.
  10. Install the engine front cover to the engine.
    11. Fig 7: Engine Front Cover Bolts
    GM97759Courtesy of GENERAL MOTORS CORP.
  11. Install the engine front cover bolts (1-7).

    Tighten: 

    1. Tighten the bolts to 20 N.m (15 lb ft).
    2. Use theJ 45059  to rotate the bolt an additional 40 degrees.

    12. Fig 8: Installing Engine Front Cover Bolts
    GM153588Courtesy of GENERAL MOTORS CORP.
  12. Install the crankshaft position sensor.
  13. Install the crankshaft position sensor studs.

    Tighten:  Tighten the studs to 30 N.m (22 lb ft).

    14. Fig 9: Crankshaft Position Sensor
    GM97733Courtesy of GENERAL MOTORS CORP.
  14. Install the oil pan-to-engine front cover bolts.

    Tighten:  Tighten the oil pan bolts to 14 N.m (125 lb in).

  15. Install the oil level sensor.

    Tighten:  Tighten the sensor to 20 N.m (15 lb ft).

  16. Connect the oil level sensor electrical connector.
  17. Install the engine mount bracket. Refer to Engine Mount Replacement .
  18. Install the water pump pulley and bolts.

    Tighten:  Tighten the bolts to 13 N.m (116 lb in).

  19. Install the radiator outlet hose to the water pump. Refer to Radiator Hose Replacement - Outlet (L26 L32) in Engine Cooling.
  20. Install the oil filter. Install the engine oil pan drain plug. Refer to Engine Oil and Oil Filter Replacement .
    21. Fig 10: View Of Oil Filter
    GM153591Courtesy of GENERAL MOTORS CORP.
  21. Install the new engine front cover seal using J 35354  .
    22. Fig 11: Installing Crankshaft Front Oil Seal
    GM153590Courtesy of GENERAL MOTORS CORP.
  22. Tighten the bolt until the crankshaft front oil seal is seated in the engine front cover.
  23. Remove the J 35354  .
  24. Install the crankshaft position sensor shield.
    25. Fig 12: Crankshaft Position Sensor Shield
    GM97731Courtesy of GENERAL MOTORS CORP.
  25. Connect the electrical connectors to the following:
    • Oil pressure sensor
    • Crankshaft position (CKP) sensor
    • Camshaft position (CMP) sensor
  26. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement .
  27. Lower the vehicle.
  28. Install the power steering pump and the bolts.

    Tighten:  Tighten the bolts to 34 N.m (25 lb ft).

    29. Fig 13: View Of Power Steering Pump And Mounting Bolts
    GM282122Courtesy of GENERAL MOTORS CORP.
  29. Remove the engine support fixture.
  30. Install the drive belt tensioner. Refer to Drive Belt Tensioner Replacement .
  31. Fill the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
  32. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  33. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  34. Inspect for leaks.
  35. Perform the CKP system variation learn procedure. Refer to CKP System Variation Learn Procedure in Engine Controls - 3.8L.
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