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 part of the same size as piston.

CAUTION:
^ Marks are displayed on the end of top and second rings. When installing the ring to piston, face this mark upward.
^ Oil ring consists of the upper rail, expander and lower rail. When installing on the piston, be careful of the direction of each rail





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








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

NOTE: Before measuring the clearance, clean the piston ring groove and piston ring.