GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Yukon XL Denali 🢒 Engine 🢒 Engine Mechanical - 4.8L, 5.3L, and 6.0L 🢒 Engine Front Cover Cleaning and Inspection

    Object Number: 1272843 Size: SH

    Important: 

       • Do not use the crankshaft oil seal again. Install a NEW crankshaft oil seal during assembly.
       • Do not use the front cover-to-engine block gasket again. Install a NEW gasket during assembly.

  1. Remove the crankshaft oil seal (140) from the front cover.
  2. Clean the cover in solvent. Remove the sealant from the cover oil pan surface. Refer to Replacing Engine Gaskets .

    3. Caution: Refer to Safety Glasses Caution in the Preface section.

  3. Dry the cover with compressed air.
  4. Inspect the gasket sealing surfaces for excessive scratches or gouging.
  5. Inspect the cover-to-oil pan threaded bolt holes for damaged threads or debris.
  6. Inspect the crankshaft oil seal mounting bore for damage.