LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1719 (Engine Mechanical - 3.6L (4 Of 6)) >> Repair Instructions - Off Vehicle (2 Of 4) >> Piston, Connecting Rod, and Bearing Cleaning and Inspection >> Piston Inspection Procedure

Piston Inspection Procedure

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Piston Inspection Areas
    GM1316529Courtesy of GENERAL MOTORS CORP.
  1. Inspect the pistons for the following conditions:
    • Cracked ring lands, skirts or pin bosses
    • Ring grooves for nicks, burrs that may cause binding (5)
    • Warped or worn ring lands (5)
    • Piston pin retainer grooves for burrs (2)
    • Eroded areas at the top of the piston (1)
    • Scuffed or damaged skirt coating (4)
    • Worn piston pin bores or worn piston pins (3)
  2. Replace pistons that show any signs of damage or excessive wear.