End Gap

1. Measure gap between ends of piston ring with Feeler Gauge 303-D027 (D81L-4201-A) or equivalent. If ring gap is less than or greater than specified limits, try another piston ring set.

If end gap is greater than service limit, replace piston ring. If end gap is smaller than service limit, even with a new piston ring, rebore cylinder block.

2. If clearance is greater than service limit, replace piston ring. If clearance exceeds service limit even with a new piston ring, replace piston.
3. Piston rings should be staggered on the piston to make sure the piston ring end gaps are not aligned.