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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Replacing Oil Pan >> Removal

Replacing Oil Pan: Removal

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Engine Electrical Connectors (Left Side)
    GM911140Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (L26) in Engine Electrical.
  2. Remove the fuel injector sight shield. Refer to Replacing Fuel Injector Sight Shield .
  3. Remove the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement In Engine Controls - 3.8L.
  4. Install the engine support fixture. Refer to Engine Support Fixture .
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Drain the engine oil and remove the oil filter. Refer to Replacing Engine Oil and Oil Filter .
  7. Remove the power steering oil cooler pipe brackets from the frame.
  8. Disconnect the oil level sensor electrical connector (10).
  9. Remove the oil level sensor wiring harness bolt and reposition the oil level sensor wiring harness.
    10. Fig 2: Right Exhaust Manifold & Catalytic Converter Pipe
    GM911163Courtesy of GENERAL MOTORS CORP.
  10. Remove the catalytic converter (3) to the right exhaust manifold pipe stud nuts (2) and reposition the catalytic converter.
  11. Remove the left engine mount strut. Refer to Replacing Engine Mount Strut - Left .
  12. Remove the right engine mount strut. Refer to Replacing Engine Mount Strut - Right .
  13. Remove the torque converter covers. Refer to Torque Converter Cover Replacement in Automatic Transaxle - 4T65-E.
  14. Lower the vehicle.
  15. Using the engine support fixture raise the engine to gain access for the oil pan removal.
  16. Raise the vehicle.
    17. NOTE: Remove the oil level sensor, located in the oil pan, before the oil pan is removed. The sensor may be damaged if the oil pan is removed first.
    Fig 3: Oil Level Sensor
    GM97768Courtesy of GENERAL MOTORS CORP.
  17. Remove the oil level sensor.
    18. Fig 4: Oil Pan & Bolt
    GM97771Courtesy of GENERAL MOTORS CORP.
  18. Remove the oil pan bolts.
  19. Remove the oil pan.
    20. Fig 5: Oil Pump Pipe Screen Assembly & Oil Pan Gasket
    GM97769Courtesy of GENERAL MOTORS CORP.
  20. Remove the oil pump pipe screen assembly and the oil pan gasket.
  21. Clean the following parts:
    • Oil pump screen mating surfaces
    • Oil pan flanges
    • Oil pan rail
    • Front cover
    • Rear main bearing cap
    • Threaded holes
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