Piston Ring Replacement
|1.||Remove the piston from the engine block.|
|2.||Using a ring expander (A), remove the old piston rings (B).|
|3.||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.
|4.||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.
|5.||Measure the piston ring end-gap (B) with a feeler gauge:|
|6.||Install the top ring and the second ring as shown. The top ring (A) has a 1T, 1A, or 1R mark, and the second ring (B) has a 2T, 2A, or 2R mark. The manufacturing marks (C) must be facing upward.|
|7.||Rotate the rings in their grooves to make sure they do not bind.|
|8.||Position the ring end gaps as shown:|
|9.||After installing a new set of rings, measure the ring-to-groove clearances:|