GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2008 🢒 H3 🢒 Engine 🢒 Engine Mechanical - 3.7L 🢒 Oil Pan Replacement

Removal Procedure
  1. Remove the oil level indicator and tube. Refer to Oil Level Indicator and Tube Replacement .
  2. Remove the oil pan skid plate. Refer to Oil Pan Skid Plate Replacement .
  3. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  4. Remove the crossmember. Refer to Crossmember Replacement .

    5. Object Number: 1339814 Size: SH
  5. Remove the differential carrier assembly bushing to frame bolts ONLY.
  6. Pull the differential carrier assembly downward.
  7. Secure the pinion yoke, in order to prevent the differential carrier from rotating.

    8. Object Number: 1350702 Size: SH
  8. Remove the service slot plug.
  9. Remove the nuts securing the fuel hose/pipe bracket to the transmission, and position aside.
  10. Remove 4 lower transmission mounting bolts that are attached to the oil pan.
  11. Remove the power steering gear. Refer to Steering Gear Replacement .
  12. Pull the power steering gear downward in order to gain access to the oil pan.
  13. Disconnect the engine wiring harness retainers from the oil pan.

    14. Object Number: 1562576 Size: SH
  14. Remove the oil pan bolts.
  15. Install 2 bolts in the threaded holes at the rear of the oil pan to act as jack screws and tighten evenly to release the oil pan from the engine block.
  16. Remove the oil pan.
  17. Remove the 2 bolts from the jack screw holes.
  18. Clean and inspect the oil pan. Refer to Oil Pan Cleaning and Inspection .
  19. Clean and inspect the engine block sealing surface.

Installation Procedure

    Object Number: 858363 Size: SH

    Important: The oil pan must be installed within 10 minutes from when the sealer was applied.

  1. Apply a 5.5 mm (0.22 in) bead of sealer to the oil pan in the areas marked (1). Refer to Adhesives, Fluids, Lubricants, and Sealers .
  2. Apply a 3 mm (0.12 in) bead of sealer to the oil pan in the area marked (2). Refer to Adhesives, Fluids, Lubricants, and Sealers .

    3. Object Number: 1562576 Size: SH

    Important: Use care not to allow the sealer to contact the oil pump pipe and screen assembly.

  3. Position the oil pan to the engine block.
  4. Ensure the oil pan is positioned fully rearward against the transmission mounting surface.

    5. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the oil pan bolts.
  6. Tighten the oil pan bolts.

    7. Tighten

        • Tighten the (side) bolts to 25 N·m (18 lb ft).
        • Tighten the (end) bolts to 10 N·m (89 lb in).
  7. Connect the engine wiring harness retainers to the oil pan.
  8. Position the power steering gear upward to the frame assembly.
  9. Install the power steering gear. Refer to Steering Gear Replacement .

    10. Object Number: 1350702 Size: SH
  10. Install the 4 lower transmission mounting bolts.

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

  11. Install the nuts securing the fuel hose/pipe bracket to the transmission.

    12. Tighten
    Tighten the nuts to 20 N·m (15 lb ft).

  12. Install the service slot plug.

    13. Object Number: 1339814 Size: SH
  13. Position the differential carrier assembly to the frame.
  14. Install the differential carrier assembly bushing to frame bolts.

    15. Tighten
    Tighten the bolts to 152 N·m (112 lb ft).

  15. Install the crossmember. Refer to Crossmember Replacement .
  16. Install the oil pan skid plate. Refer to Oil Pan Skid Plate Replacement .
  17. Install the oil level indicator and tube. Refer to Oil Level Indicator and Tube Replacement .
  18. Fill the engine oil. Refer to Engine Oil and Oil Filter Replacement .