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Home >> Pontiac >> 2008 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.8L) >> Repair Instructions - Off Vehicle >> Piston and Connecting Rod Assemble

Piston and Connecting Rod Assemble

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Piston Pin, Piston, Clips & Connecting Rod
    GM35866Courtesy of GENERAL MOTORS CORP.
  1. Coat the piston pin with oil.
  2. Install one piston pin retainer into the retaining groove.
  3. Install the connecting rod and piston pin. The connecting rod can be installed in either direction. Push the piston pin in until it bottoms against the installed piston pin retainer.
  4. Install the second piston pin retainer.
  5. Ensure the piston pin moves freely.
    6. Fig 2: Exploded View Of Piston Rings
    GM4967Courtesy of GENERAL MOTORS CORP.
    NOTE: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.
    IMPORTANT: To provide an effective compression and oil seal, the ring gaps must be staggered a minimum of 90 degrees.
  6. Using the piston ring pliers, install the piston rings onto the piston.
    1. Install the oil control ring spacer into the bottom groove of the piston.
    2. Install the lower oil control ring.

      The oil control rings do not have a dimple or orientation mark and may be installed in either direction.

    3. Install the upper oil control ring.
    4. Install the middle compression ring with the dot facing up.
    5. Install the top compression ring in either direction. The ring has no orientation markings.
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