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
NOTE: The identification mark on face of upper and intermediate piston rings must point toward top of piston.
CAUTION: Install piston rings in the following order:
- Oil ring expander.
- Upper oil ring side rail.
- Lower oil ring side rail.
- No. 2 Intermediate piston ring.
- No. 1 Upper piston ring.
1. Install oil ring expander.
2. Install upper side rail first and then the lower side rail. Install the side rails by placing one end between the piston ring groove and the oil ring expander. Hold end firmly and press down the portion to be installed until side rail is in position. Do not use a piston ring expander.
NOTE: The compression rings are marked Y1 for the upper compression ring and Y2 for the second compression ring. These markings must face upward.
3. Install No. 2 piston ring and then No. 1 piston ring.
NOTE: Install the piston rings so the gaps positioned as indicated with the piston viewed from the top.
NOTE: Staggering ring gap is important for oil control.
4. Install the oil expander so the ring gap is located in the (1) position.
5. Install the oil ring rails so the ring gap is located in the (2,4) position.
6. Install the second compression ring so the ring gap is located in the (3) position.
7. Install the top compression so the ring gap is located in the (1) position.