Visual Inspection And Cleaning Procedure: Piston
- Clean the piston with a cleaning solvent. DO NOT wire brush any parts of the piston.
Courtesy of GENERAL MOTORS COMPANY
- Clean the piston ring grooves.
- Inspect the piston on the following:
- Cracked ring lands, skirts or pin bosses
- Ring grooves for nicks
- Eroded areas on the top of the piston (1)
- Scuffed or damaged skirts (2)
- Worn piston pin bores (3)
- If there is any excessive wear, replace the piston.
- Measure the clearance between piston pin and piston bore.