GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 XLR 🢒 Engine 🢒 Engine Mechanical - 4.6L (LH2) 🢒 Oil Pan Replacement

Removal Procedure

    Object Number: 928632 Size: SH
  1. Remove the front suspension crossmember. Refer to Front Suspension Crossmember Replacement .
  2. Drain the engine oil.
  3. Remove the engine oil filter and allow to drain.
  4. Remove the automatic transmission fluid cooler lines.

    5. Object Number: 927846 Size: SH
  5. Disconnect the engine oil level sensor electrical connector .
  6. Remove the oil level sensor. Refer to Engine Oil Level Sensor and/or Switch Replacement .

    7. Object Number: 928632 Size: SH
  7. Remove the oil pan bolts.
  8. Remove the oil pan.

    9. Object Number: 1040538 Size: SH
  9. Clean and inspect the oil pan. Refer to Oil Pan Cleaning and Inspection .

Installation Procedure

Important: All gasket surfaces should be free of oil or other foreign material during assembly.

The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the flywheel housing cover. To ensure the rigidity of the powertrain it is important that the rear of the block and the rear of the oil pan are flush or even. The rear of the oil pan must NEVER protrude beyond the engine block .

  1. Install a new oil pan gasket on the oil manifold plate.

    2. Object Number: 928632 Size: SH
  2. Position the oil pan to the crankcase.
  3. The oil pan must be held flush to 0.50 mm (0.020 in) forward of the rear face of the engine block.

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


    Object Number: 928633 Size: SH
  4. Install the oil pan retaining bolts.

    5. Tighten

        • First Pass: Tighten the oil pan bolts to 15 N·m (11 lb ft).
        • Final Pass: Tighten the oil pan bolts to 25 N·m (18 lb ft).
  5. Install the oil drain plug.

    6. Tighten
    Tighten the oil drain plug to 25 N·m (18 lb ft).

    Notice: Refer to Component Fastener Tightening Notice in the Preface section.


    Object Number: 1261684 Size: SH
  6. Install the engine oil level sensor (1) into the oil pan.

    7. Tighten
    Tighten the engine oil level sensor to 20 N·m (15 lb ft).

  7. Connect the electrical connector (2) to the engine oil level sensor (1).

    8. Object Number: 651883 Size: SH
  8. Install the automatic transmission fluid cooler lines.
  9. Install a NEW engine oil filter.

    10. Tighten
    Tighten the engine oil filter to 30 N·m (22 lb ft).

  10. Install the front suspension crossmember to the vehicle. Refer to Front Suspension Crossmember Replacement .
  11. Fill the crankcase with the proper quantity and grade of engine oil. Refer to Approximate Fluid Capacities and Fluid and Lubricant Recommendations .
  12. Check the transmission fluid level. Refer to Transmission Fluid Check .
  13. Run the engine and check for leaks.