GM Service Manual Online
For 1990-2009 cars only
  1. Prise the old front cover oil seal from the cover and discard. Refer to 6A3 2.25 Crankshaft Front Oil Seal.
  2. Clean the front cover in a commercially available cleaning fluid and blow dry using compressed air.
  3. Inspect the front cover sealing surfaces for excessive scratches and/or gouges.
  4. Inspect the front cover gasket for damage to the membrane or distortion to the aluminium carrier.
  5. Inspect the font cover to oil pan threaded holes for damaged threads or debris.
  6. Inspect the cover crankshaft oil seal bore for damage.