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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 Crankshaft Rear Oil Seal & Housing >> Installation

Replacing Crankshaft Rear Oil Seal & Housing: Installation

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. Ensure that the crankshaft rear oil seal is removed from the crankshaft rear oil seal housing.
  2. Clean the old gasket from the crankshaft rear oil seal housing and the cylinder block.
  3. Install the new gasket over the crankshaft rear oil seal housing bolt threads to aid in proper alignment of the gasket.
    4. Fig 1: Crankshaft Rear Oil Seal Housing
    GM406047Courtesy of GENERAL MOTORS CORP.
    NOTE: Correct alignment of the housing is crucial to sealing ability of the rear main and the oil pan. Take care when installing the housing to ensure that the housing is properly aligned. Failure to follow these procedures may result in oil leaks.
  4. Install the crankshaft rear oil seal housing and finger tighten all the bolts (loose enough to adjust the crankshaft rear oil seal housing) to hold the crankshaft rear oil seal housing in place. Make sure the gasket is not higher than the crankshaft rear oil seal housing.

    Plastic inserts in the crankshaft rear oil seal housing are only used as an assembly aid and are not required for service.

  5. Wipe a thin film of oil on both sides of the J 41349  to aid in installation and removal from the crankshaft. See Special Tools .
    6. Fig 2: Installing J 41349 Over Crankshaft
    GM153603Courtesy of GENERAL MOTORS CORP.
  6. Install the J 41349  over the crankshaft. See Special Tools . Twisting or turning the J 41349  aids in sliding it completely over the crankshaft. See Special Tools .
    7. Fig 3: Measuring Cylinder Block Oil Pan Flange & Rear Oil Seal Housing Flange
    GM406048Courtesy of GENERAL MOTORS CORP.
  7. Place a straight edge on the cylinder block oil pan flange and the rear oil seal housing flange. Use a feeler gage to make sure that there is no more than 0.1016 mm (0.004 in) step (high or low) on each side. Rotate the crankshaft rear oil seal housing to get the step equal on each side, if necessary. If the crankshaft rear oil seal housing can not be rotated to get the step within specification, replace the crankshaft rear oil seal housing.
    8. NOTE: Refer to Fastener Notice in General Information.
  8. Tighten the crankshaft rear oil seal housing bolts.

    Tighten: 

    1. Tighten the crankshaft rear oil seal housing bolts to 15 N.m (11 Ft. Lbs.).
    2. Use the J 45059  to rotate the crankcase rear oil seal housing bolts an additional 50 degrees.

  9. Remove the J 41349  . See Special Tools .
  10. Recheck the step height on each side to make sure that the crankshaft rear oil seal housing did not move while tightening the bolts. If the step height is beyond specification, repeat steps 4 through 8 and measure again. If excessive clearance is still present, replace the crankshaft rear oil seal housing.
  11. Install the new crankshaft rear oil seal. Refer to Crankshaft Rear Oil Seal Replacement .
  12. Install the oil pan. Refer to Replacing Oil Pan .
  13. Install the engine flywheel. Refer to Replacing Engine Flywheel .
  14. Lower the vehicle.
  15. Fill 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.
  16. Fill the crankcase with engine oil. Refer to Replacing Engine Oil and Oil Filter .
  17. Inspect for leaks.
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