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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1029 (Engine Mechanical - 4.8L, 5.3L & 6.0L (Repair Instructions - 3 Of 3)) >> Repair Instructions (Off-Vehicle Repair Instructions Part 3) >> Engine Valley Cover Cleaning and Inspection

Engine Valley Cover Cleaning and Inspection

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the knock sensor oil seals (520) from the valley cover (555).
    IMPORTANT:
    • Do not use the valley cover knock sensor oil seals again. Install NEW oil seals during assembly.
    • Do not use the valley cover gasket again. Install a NEW gasket during assembly.
    Fig 1: View Of Knock Sensor Oil Seals & Valley Cover
    GM1277106Courtesy of GENERAL MOTORS CORP.
  2. Clean the valley cover in solvent.
    3. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  3. Dry the valley cover with compressed air.
  4. Inspect the gasket sealing surfaces for excessive scratches or gouging. Refer to Replacing Engine Gaskets .
  5. Inspect the valley cover oil seal bores for excessive scratches or gouging.
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