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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1444 (Engine Mechanical - 5.3L (Lm4)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Engine Valley Cover Cleaning and Inspection

Engine Valley Cover Cleaning and Inspection

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Knock Sensor Oil Seals & Valley Cover
    GM1277106Courtesy of GENERAL MOTORS CORP.
    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.
  1. Remove the knock sensor oil seals (520) from the valley cover (555).
  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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