GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2002 🢒 Grand Prix 🢒 Engine 🢒 Engine Mechanical - 3.1L 🢒 Oil Pan Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Remove the engine mount struts from the engine. Refer to Engine Mount Strut Replacement .
  3. Install the engine support fixture. Refer to Engine Support Fixture .
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  5. Remove the A/C compressor; secure and reposition the compressor. Do not discharge the A/C system. Refer to Air Conditioning Compressor Replacement in Heating, Ventilation and Air Conditioning.
  6. Remove the 3-way catalytic converter pipe from the right exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
  7. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .

    8. Object Number: 54406 Size: SH
  8. Disconnect the oil level sensor electrical connector.
  9. Remove the starter motor. Refer to Starter Motor Replacement in Engine Electrical.
  10. Remove the transaxle brace from the oil pan. Refer to Transmission Brace Replacement in Automatic Transaxle - 4T65-E.
  11. Loosen the transaxle mount lower nuts. Refer to Transmission Mount Replacement in Automatic Transaxle - 4T65-E.
  12. Remove the engine mount lower nuts. Refer to Engine Mount Replacement .
  13. Lower the vehicle.
  14. Use the engine support fixture in order to raise the engine.
  15. Raise the vehicle.
  16. Remove the engine mount bracket with the engine mount from the oil pan. Refer to Engine Mount Bracket Replacement .
  17. Remove the right lower ball joint from the steering knuckle. Refer to Lower Control Arm Ball Joint Replacement in Front Suspension.
  18. Remove the right outer tie rod from the steering knuckle. Refer to Rack and Pinion Outer Tie Rod End Replacement in Power Steering System.
  19. Remove the right side frame bolts.
  20. Loosen the left side frame bolts.

    21. Object Number: 105907 Size: MH
  21. Use J 39505 in order to remove the right oil pan side bolts.

    22. Object Number: 105914 Size: SH
  22. Remove the left oil pan side bolts.

    23. Object Number: 105918 Size: MH
  23. Remove the oil pan bolts.
  24. Remove the oil pan.
  25. Remove the oil pan gasket.
  26. Clean the oil pan and the engine block gasket surface.

Installation Procedure

    Object Number: 61840 Size: SH
  1. Apply sealant at the rear main bearing cap and the engine block (1).
  2. Install the oil pan gasket.
  3. Install the oil pan.

    4. Object Number: 105918 Size: MH

    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.

  4. Install the oil pan bolts.

    5. Tighten
    Tighten the bolts to 25 N·m (18 lb ft).


    Object Number: 105914 Size: SH
  5. Install the left oil pan side bolts.

    6. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).


    Object Number: 105907 Size: MH
  6. Use J 39505 in order to install the right oil pan side bolts.

    7. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  7. Install the frame bolts. Refer to Frame Replacement in Frame and Underbody.
  8. Install the right lower ball joint to the steering knuckle. Refer to Lower Control Arm Ball Joint Replacement in Front Suspension.
  9. Install the right outer tie rod to the steering knuckle. Refer to Rack and Pinion Outer Tie Rod End Replacement in Power Steering System.
  10. Install the engine mount bracket with the engine mount to the oil pan. Refer to Engine Mount Bracket Replacement .
  11. Lower the vehicle.
  12. Use the engine support fixture in order to lower the engine.
  13. Raise the vehicle.
  14. Install the transaxle mount lower nuts. Refer to Transmission Mount Replacement in Automatic Transaxle - 4T65-E.
  15. Install the engine mount lower nuts. Refer to Engine Mount Replacement .
  16. Install the transaxle brace to the oil pan. Refer to Transmission Brace Replacement in Automatic Transaxle - 4T65-E.
  17. Install the starter motor. Refer to Starter Motor Replacement in Engine Electrical.

    18. Object Number: 54406 Size: SH
  18. Connect the oil level sensor electrical connector.
  19. Install the 3-way catalytic converter pipe to the right exhaust manifold. Refer to Catalytic Converter Replacement in Engine Exhaust.
  20. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement in Heating, Ventilation and Air Conditioning.
  21. Lower the vehicle.
  22. Remove the engine support fixture.
  23. Install the engine mount struts to the engine. Refer to Engine Mount Strut Replacement .
  24. Fill the crankcase with engine oil. Refer to Engine Oil and Oil Filter Replacement .
  25. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.