Removal and Replacement

RINGS-PISTON

REMOVAL





1. Using a suitable ring expander, remove upper and intermediate piston rings.
2. Remove the upper oil ring side rail, lower oil ring side rail and then oil ring expander from piston.
3. Clean ring grooves of any carbon deposits.

INSTALLATION





The No. 1 (1) and No. 2 (2) piston rings have a different cross section. Install rings with manufacturers I.D. mark facing up, to the top of the piston.

CAUTION: Install piston rings in the following order:
^ Oil ring expander
^ Lower oil ring side rail
^ Upper oil ring side rail
^ No. 2 intermediate piston ring
^ No. 1 upper piston ring

1. Install oil ring expander.





2. Install the lower oil ring side rail by placing one end between the piston ring groove and the expander. Hold end firmly and press down the portion to be installed until side rail (1) is in position. Do not use a piston ring expander.





3. Install upper oil ring side rail.
4. Install No. 2 piston ring and then No. 1 piston ring.





5. Position piston ring end gaps as shown.
6. Position oil ring expander gap at least 45° from the side rail gaps but not on the piston pin center or on the thrust direction. Staggering ring gap is important for oil control.