Piston Ring
Piston RingsAny worn or damaged part discovered during engine overhaul must be replaced with a new one.
1. Ring end gap measurement
^ Insert the piston ring into the bore.
^ Push the ring by the piston, at a right angle to the wall, into the point at which the cylinder bore diameter is the smallest.
^ Measure the ring end gap.
^ Positioning mark (1) is painted as shown in the illustration.
Marked T: No.1 Compression ring
Marked T2: No.2 Compression ring
2. Measure the clearance between the piston ring groove and the piston ring with a feeler gauge. If the piston ring groove/piston ring clearance exceeds the specified limit, the piston must be replaced.
Compression Ring Clearance
Standard: 0.016 mm - 0.038 mm (0.0006 inch - 0.0015 inch)
Limit: 0.15 mm (0.0059 inch)