Remove the piston from the engine block.

Using a ring expander (A), remove the old piston rings (B).

Clean all ring grooves thoroughly with a squared-off broken ring or ring groove cleaner with a blade to fit the piston grooves.

The top and 2nd ring grooves are 1.2 mm (0.05 in.) wide. The oil ring groove is 2.0 mm (0.08 in.) wide.

File down a blade if necessary.

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

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

Using a piston that has its rings removed, push a new ring (A) into the cylinder bore 15−20 mm (0.6−0.8 in.) from the bottom.

Measure the piston ring end-gap (B) with a feeler gauge:

Piston Ring End-Gap
Top Ring:
Standard (New):	0.20−0.35 mm (0.008−0.014 in.)
Service Limit:	0.60 mm (0.024 in.)
Second Ring:
Standard (New):	0.50−0.65 mm (0.020−0.026 in.)
Service Limit:	0.75 mm (0.030 in.)
Oil Ring:
Standard (New):	0.20−0.70 mm (0.008−0.028 in.)
Service Limit:	0.80 mm (0.031 in.)

Install the top ring and the second ring as shown. The top ring (A) has a 1R mark and the second ring (B) has a 2R mark. The manufacturing marks (C) must be facing upward.

Rotate the rings in their grooves to make sure they do not bind.

Position the ring end gaps as shown:

After installing a new set of rings, measure the ring-to-groove clearances.

Standard (New):	0.045−0.070 mm (0.0018−0.0028 in.)
Service Limit:	0.13 mm (0.005 in.)

Standard (New):	0.040−0.065 mm (0.0016−0.0026 in.)
Service Limit:	0.13 mm (0.005 in.)