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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 Engine Front Cover >> Removal

Replacing Engine Front Cover: 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.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (L26) in Engine Electrical.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Drain the engine oil. Refer to Replacing Engine Oil and Oil Filter .
  4. Drain the cooling system. Refer to Draining and Filling Cooling System (L26 Static Fill) or Draining and Filling Cooling System (L26, LY7, GE 47716 Fill) in Engine Cooling.
  5. Lower the vehicle.
  6. Loosen the water pump pulley bolts.
  7. Remove the drive belt tensioner. Refer to Replacing Drive Belt Tensioner .
  8. Remove the water pump pulley.
    9. Fig 1: View Of Power Steering Pump And Mounting Bolts
    GM282122Courtesy of GENERAL MOTORS CORP.
  9. Remove the power steering pump bolts and reposition the pump.
  10. Raise the vehicle.
  11. Remove the crankshaft balancer. Refer to Replacing Crankshaft Balancer .
    12. Fig 2: Removing Crankshaft Front Oil Seal
    GM153586Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Be careful not to damage the crankshaft.
  12. Pry out the crankshaft front oil seal with a flat-bladed tool such as a large screwdriver. Use care to avoid damaging the crankshaft front oil seal bore or the crankshaft front oil seal contact surfaces.
  13. Disconnect the electrical connectors from the following:
    • Camshaft position (CMP) sensor
    • Crankshaft position (CKP) sensor
    • Oil pressure sensor
    14. Fig 3: Crankshaft Position Sensor Shield
    GM97731Courtesy of GENERAL MOTORS CORP.
  14. Remove the crankshaft position sensor shield.
  15. Remove the radiator outlet hose from the water pump. Refer to Radiator Hose Replacement - Outlet (3.8L) in Engine Cooling.
  16. Lower the vehicle.
  17. Install the engine support fixture. Refer to Installing Engine Support Fixture .
  18. Raise the vehicle.
    19. Fig 4: Identifying Oil Filter
    GM406039Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The oil pan can be dropped slightly for engine front cover clearance if all pan bolts are loosened and the oil level sensor is removed.
  19. Remove the oil filter.
  20. Remove the engine mount bracket for oil pan access. Refer to Replacing Engine Mount Bracket - Front .
  21. Disconnect the oil level sensor electrical connector.
  22. Remove the oil level sensor.
  23. Remove the oil pan-to-engine front cover bolts.
  24. Loosen the remaining oil pan bolts to gain access for the engine front cover removal. DO NOT remove the remaining oil pan bolts.
    25. Fig 5: Crankshaft Position Sensor
    GM97733Courtesy of GENERAL MOTORS CORP.
  25. Remove the crankshaft position sensor.
    26. Fig 6: Engine Front Cover & Bolts
    GM97759Courtesy of GENERAL MOTORS CORP.
  26. Remove the engine front cover bolts.
  27. Remove the engine front cover with the oil filter adapter as one assembly.
    28. Fig 7: Engine Front Cover Gasket
    GM97758Courtesy of GENERAL MOTORS CORP.
  28. Remove the engine front cover gasket.
    29. Fig 8: Removing/Installing Oil Filter Adapter & Pressure Relief Valve
    GM406042Courtesy of GENERAL MOTORS CORP.
  29. If replacing the engine front cover, remove the oil filter adapter and pressure relief valve from the engine front cover.
    30. Fig 9: Locating Water Pump Bolts
    GM46177Courtesy of GENERAL MOTORS CORP.
  30. If replacing the engine front cover, remove the water pump from the engine front cover.
    31. Fig 10: Identifying Oil Pump Cover & Gear Set
    GM153600Courtesy of GENERAL MOTORS CORP.
  31. If replacing the engine front cover, remove the oil pump cover and gear set from the engine front cover. Refer to Replacing Oil Pump Cover and Gear Set .
  32. Inspect the oil pump cover and gear set. Refer to Oil Pump Cleaning & Inspection .
    33. Fig 11: Camshaft Position Sensor
    GM153587Courtesy of GENERAL MOTORS CORP.
  33. If replacing the engine front cover, remove the camshaft position sensor from the engine front cover.
  34. Inspect the timing chain for overall in and out movement. Maximum movement is 25.4 mm (1 in). Refer to Timing Chain and Sprockets Cleaning & Inspection (L26) .
  35. Inspect the sprockets for wear.
  36. Inspect the oil pan gasket. Replace the oil pan gasket if necessary.
  37. Clean the engine front cover mating surfaces.
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