GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Valve Rocker Arm and Push Rod Cleaning and Inspection
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Object Number: 635934 Size: SH

Important: Parts that are to be reused must be marked, sorted, and organized for assembly.

  • Mark, sort, and organize the components for assembly.
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    Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

    Caution: Wear safety glasses in order to avoid eye damage.

  • Clean the components with cleaning solvent.
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  • Dry the components with compressed air.
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  • Inspect the valve rocker components for the following:
    •    - Valve rocker arm valve pushrod socket contact surface (1)
       - The contact surface must be smooth with no scoring or excessive wear.
       - Valve rocker arm roller pivot for binding or damage (2)
       - Valve rocker arm valve stem contact surface (3)
       - The contact surface should be smooth with no scoring or excessive wear.
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    Object Number: 488857 Size: SH
  • Inspect the valve pushrods for the following:
    •    - Restriction of the oil passage (1)
       - Wear or scoring of the end contact surfaces (2)
       - The end contact surfaces must be smooth with no scoring or excessive wear.
       - Shaft for bends (3)
       - Roll the valve pushrod on a flat surface to determine if the valve pushrod is bent.