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Valve Lifters 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. Push the roller towards the roller lifter body and measure the distance between the bottom of the roller and the roller lifter body. The production value is 0.989-1.0 mm (0.0389-0.0394 in) and the service limit is 0.9 mm (0.0354 in).
  2. Replace the valve lifter if the measurement exceeds the service limit.
    3. Fig 1: Measuring Distance Between Bottom Of Roller & Roller Lifter Body
    GM663574Courtesy of GENERAL MOTORS CORP.
  3. Inspect the valve lifters for the following:
    • The valve lifter body for scuffing and wear
    • The valve lifter roller assembly for wear
    • The valve lifter roller for smooth rotation
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