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Home >> Cadillac >> 2010 >> STS 3.6 V, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Mechanical - 4.6L (LH2) - Repair Instructions - Off Vehicle - 1 Of 3) >> Lower Crankcase Removal

Lower Crankcase Removal

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Right Lower Crankcase Perimeter Bolts
    GM947505Courtesy of GENERAL MOTORS CORP.
  1. Remove the 4 lower crankcase perimeter retaining bolts along the right side of the engine.
  2. Fig 2: Left Lower Crankcase Perimeter Retaining Bolts
    GM947530Courtesy of GENERAL MOTORS CORP.
  3. Remove the 4 lower crankcase perimeter retaining bolts along the left side of the engine.
  4. Fig 3: Main Bearing Bolts
    GM1510043Courtesy of GENERAL MOTORS CORP.
  5. Remove the main bearing bolts. Note the location of the single stud-end bolt (1) used to attach the oil pump pipe and screen assembly support bracket.
  6. Fig 4: Oil Manifold Plate Bolts
    GM1510044Courtesy of GENERAL MOTORS CORP.
  7. Remove the oil manifold plate bolts.
  8. Fig 5: Oil Manifold & Oil Scraper Plate Assembly
    GM1510045Courtesy of GENERAL MOTORS CORP.
  9. Remove the oil manifold and oil scraper plate assembly.
  10. Fig 6: Crankcase Halves
    GM947572Courtesy of GENERAL MOTORS CORP.
    CAUTION: Use a plastic pry tool when prying case halves apart to prevent damage to the Upper and Lower Crankcase surface. Do not continue to push the pry tool in the crankcase as the Upper and Lower Crankcase halves separate. This may damage the sealing surface.
  11. Working on either side of the lower crankcase, separate the crankcase halves by alternately prying in the grooves provided until the lower crankcase is free of the dowel pins.
  12. Fig 7: Lower Crankcase
    GM947585Courtesy of GENERAL MOTORS CORP.
  13. Remove the lower crankcase.
  14. Fig 8: Upper-To-Lower Crankcase Seals
    GM947594Courtesy of GENERAL MOTORS CORP.
  15. If equipped, remove and discard the upper-to-lower crankcase seals.