Service manual

Piston, Connecting Rod, and Bearings
Cleaning and Inspection
SIE-ID = 784237
Caution: Refer to Safety Glasses Caution in
Cautions and Notices.
Important: Measurement of all the components
should be taken with the components at room
temperature.
Do not use a wire brush in order to clean any part of
the piston.
1. Clean the piston and connecting rod in cleaning
solvent.
2. Dry the components with compressed air.
3. Clean the piston ring grooves with a suitable ring
groove cleaning tool.
4. Clean the piston oil lubrication holes and slots.
5. Inspect the piston for the following:
• Eroded areas (1) on the top of the piston
• Scuffed or damaged skirt (2)
• Damage to the piston pin bore (3)
• Cracks in the piston ring lands, the piston skirt,
or the piston pin bosses
• Piston ring grooves for nicks, burrs, or other
warpage which may cause the piston ring
to bind.
6. Inspect the piston pin for scoring, wear or other
damage.
34671
4977
156168
Engine Engine Mechanical - 5.0L and 5.7L 6-47
2002 - Unit Repair (May 25, 2001)