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Home >> Chevrolet >> 2021 >> Tahoe Z71 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions (4 Of 11) >> Repair Instructions >> Crankshaft Rear Oil Seal Replacement (2WD) >> Cleaning and Inspection Procedure - Required

Cleaning and Inspection Procedure - Required

  1. Clean the automatic transmission flex plate in solvent.
    GM5035046Courtesy of GENERAL MOTORS COMPANY
  2. Dry the flex plate with compressed air.
  3. Inspect the flex plate for the following conditions:
    1. Damaged ring gear teeth (1)
    2. Stress cracks around the flex plate-to-crankshaft bolt hole locations (2)
      3. NOTE:

      Do not attempt to repair the welded areas that retain the ring gear to the flex plate. Install a new flex plate.

    3. Welded areas (3) that retain the ring gear onto the flex plate for cracking.
  4. Clean the crankshaft rear oil seal housing (2) in solvent. Remove the sealant from the crankshaft rear oil seal housing surface.
    GM5035064Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

  5. Dry the crankshaft rear oil seal housing (2) with compressed air.
  6. Inspect the crankshaft rear oil seal housing gasket sealing surfaces (3) for excessive scratches or gouging.
  7. Inspect the crankshaft rear oil seal housing (2) to the oil pan threaded bolt holes for damaged threads or debris.
  8. Inspect the crankshaft oil seal mounting bore (1) for damage.
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