Piston Inspection

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the pistons for the following conditions:
- Cracked ring lands, skirts, or pin bosses
- Ring grooves for nicks, burrs that may cause binding
- Warped or worn ring lands
- Piston pin retainer grooves for burrs
- Eroded areas at the top of the piston (1)
- Scuffed or damaged skirts (2)
- Worn piston pin bores (3) or worn piston pins
Replace pistons that show any signs or damage or excessive wear.

Fig 1: Checking Piston
Courtesy of GENERAL MOTORS CORP.