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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Oil Pump Pipe Screen Assembly & Oil Pan Gasket
    GM97769Courtesy of GENERAL MOTORS CORP.
  1. Install the oil pan gasket and the oil pump pipe screen assembly.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the oil pump pipe screen bolts.

    Tighten:  Tighten the bolts to 15 N.m (11 lb ft).

    3. NOTE: Install the oil level sensor, located in the oil pan, after the oil pan is installed. The sensor may be damaged if the oil level sensor is installed first.
    Fig 2: Oil Pan & Bolt
    GM97771Courtesy of GENERAL MOTORS CORP.
  3. Install the oil pan.
  4. Clean the oil pan bolts and apply one drop of thread lock compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the oil pan bolt threads.
  5. Install the oil pan bolts.

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

    6. Fig 3: Oil Level Sensor
    GM97768Courtesy of GENERAL MOTORS CORP.
  6. Install the oil level sensor.

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

  7. Install the torque converter covers. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65 - E.
  8. Install the engine mount and the bracket to the frame.
  9. Using the jack stands raise the frame to the original position.
  10. Install the frame bolts. Refer to Frame Replacement in Frame and Underbody.
  11. Remove the jack stands.
  12. Install the right ball joint to the steering knuckle. Refer to Lower Control Arm Replacement in Front Suspension.
  13. Install the right stabilizer link. Refer to Stabilizer Shaft Link Replacement in Front Suspension.
    14. Fig 4: Right Engine Mount Bracket Bolts
    GM97804Courtesy of GENERAL MOTORS CORP.
  14. Install the engine mount bracket to the engine.
  15. Loosely install the right engine mount bracket bolts to the engine.
    16. Fig 5: Left Engine Mount Bracket Bolts
    GM97800Courtesy of GENERAL MOTORS CORP.
  16. Loosely install the left engine mount bracket bolts to the engine.

    Tighten:  Tighten the bolts to 102 N.m (75 lb ft).

  17. Lower the vehicle.
  18. Using the engine support fixture lower the engine.
  19. Raise the vehicle.
    20. Fig 6: Engine Mount Lower Nuts
    GM50411Courtesy of GENERAL MOTORS CORP.
  20. Install the engine mount lower nuts.

    Tighten:  Tighten the nuts to 47 N.m (35 lb ft).

  21. Install the oil level sensor wiring harness and the engine wiring harness heat shield bolt to the engine.

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

  22. Connect the oil level sensor electrical connector.
  23. Install the power steering oil cooler pipe brackets to the frame.
    24. Fig 7: View Of Catalytic Converter & Exhaust Manifold Pipe Stud Nuts
    GM372626Courtesy of GENERAL MOTORS CORP.
  24. Install right exhaust manifold pipe stud nuts.

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

  25. Install the engine oil filter.
  26. Lower the vehicle.
  27. Remove the engine support fixture.
  28. Install the right and left engine mount struts. Refer to Engine Mount Strut Replacement - Right  and Engine Mount Strut Replacement - Left .
  29. Install the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement in Engine Controls - 3.8L.
  30. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  31. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L36)  or Fuel Injector Sight Shield Replacement (L67) .
  32. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  33. Inspect for leaks.
  34. Measure the wheel alignment. Refer to Measuring Wheel Alignment in Wheel Alignment.
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