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Engine Valley Cover Cleaning and Inspection

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Important:  Do not use the valley cover knock sensor oil seals again. Install NEW oil seals during assembly.

  1. Remove the knock sensor oil seals (1) from the valley cover (2).
    Fig 1: Removing Knock Sensor Oil Seals From Valley Cover
    G01970962Courtesy of GENERAL MOTORS CORP.
  2. Remove the bolts (1), baffle cover (2), and baffle (3) from the valley cover (4) - LS6.
    Fig 2: Identifying Valley Cover Components
    G01970963Courtesy of GENERAL MOTORS CORP.
  3. Clean the valley cover components in solvent.
    CAUTION: Refer to SAFETY GLASSES CAUTION .
  4. Dry the components with compressed air.
  5. Inspect the gasket sealing surfaces for excessive scratches or gouging.
  6. Inspect the oil seal bores for excessive scratching or gouging.
  7. Inspect the ventilation tube for a loose fit or restrictions - LS6.
    NOTE: Refer to FASTENER NOTICE .
  8. Install the baffle (3), baffle cover (2) and bolts (1) to the valley cover (4) - LS6.

    Tighten 

    Tighten the baffle cover bolts to 5 N.m (44 lb in).

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