Piston Ring: Service and Repair

Piston Rings Replacement Procedure

1. Using a ring expander, remove the old piston rings.
2. Clean all the ring grooves thoroughly.

NOTE:
- Use a squared-off broken ring or ring groove cleaner with a blade to fit the piston grooves. File down the blade if necessary.
- Top ring groove and 2nd ring groove are 1.2 mm (0.05 inch) wide, and the oil ring groove is 2.8 mm (0.11 inch) wide.

CAUTION: Do not use a wire brush to clean the ring grooves, or cut ring grooves deeper with the cleaning tool.

NOTE: If the piston is to be separated from the connecting rod, do not install new rings yet.

3. Install the new rings in the proper sequence and position.