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Crankshaft Rear Oil Seal Housing Installation (With Seal in Housing): Installation

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    Fig 1: View Of Rear Housing Alignment Tabs
    GM1977797Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Do not use the crankshaft rear oil seal or the engine rear housing gasket again.
    • Do not apply any type of sealant to the rear housing gasket, unless specified.
    • The special tool in this procedure is used to properly align the engine rear housing at the oil pan surface.
    • First design rear housings do not have alignment tabs for alignment of the housing horizontally. J 41476  is required to properly align first design rear housings. See Special Tools . The rear oil seal must be removed from the housing for proper use of the tool.
    • Second design rear housings have alignment tabs for alignment of the housing horizontally. J 41476  is not required for proper alignment of second design rear housings. See Special Tools . The housing may be installed and aligned with the seal already installed into the housing.
  1. Inspect the rear housing to identify for alignment tabs (1).
    2. Fig 2: View Of Engine Block Rear Oil Gallery Plug
    GM63228Courtesy of GENERAL MOTORS CORP.
  2. Inspect the rear oil gallery plug for proper installation.
    3. Fig 3: View Of Rear Housing Gasket, Rear Housing With Seal And Bolts
    GM1977798Courtesy of GENERAL MOTORS CORP.
  3. Install the J 41479-2A  cone and bolts onto the rear of the crankshaft.
  4. Tighten the bolts until snug. Do not overtighten.
  5. Install the rear housing gasket (1), rear housing with seal (2), and bolts (3).
  6. Tighten the bolts finger tight. Do not overtighten.
  7. Remove the J 41479-2A  and bolts.
    8. Fig 4: View Of J 41480 Installed To Engine Block
    GM64204Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  8. Install the J 41480  and bolts. See Special Tools .

    Tighten: 

    1. Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).
    2. Tighten the J 41480  tool-to-rear housing bolts evenly to 12 N. See Special Tools .m (106 lb in).
    3. Tighten the rear housing-to-engine block bolts to 25 N.m (18 lb ft).

  9. Remove the J 41480  and bolts. See Special Tools .
    10. Fig 5: Checking Rear Cover-To-Engine Block Proper Installation Position
    GM63240Courtesy of GENERAL MOTORS CORP.
  10. Measure the rear housing-to-engine block oil pan surface for flatness.
    1. Place a straight edge onto the engine block and rear housing oil pan sealing surfaces.

      Avoid contact with the portion of the gasket that protrudes into the oil pan surface.

    2. Insert a feeler gage between the rear housing and the straight edge. The housing must be flush with the oil pan or no greater than 0.5 mm (0.02 in) below flush.
  11. If the rear housing-to-engine block oil pan surface alignment is not within specifications, repeat the housing alignment procedure.
  12. If the correct rear housing-to-engine block alignment at the oil pan surface cannot be obtained, replace the rear housing.
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