Piston Ring: Service and Repair

PISTON RING





1) If the piston ring is broken, damaged or worn, or if its tension is insufficient, or when the piston is replaced, replace the piston ring with a new one of the same size as the piston.

CAUTION:
^ Mark is displayed on the end of top and second rings. When installing the rings to the piston, face these marks upward.
^ Oil ring consists of the upper rail, expander and lower rail. Be careful about the direction of rail when installing the oil ring to piston.

2) Clean the piston ring groove and piston ring.





3) Squarely place the piston ring and oil ring in cylinder, and measure the piston ring gap with a thickness gauge.





4) Measure the clearance between piston ring and piston ring groove with a thickness gauge.