Removal and Installation

REMOVAL
1. ID mark on face of upper and intermediate piston rings must point toward piston crown.

Piston Rings-Removing And Installing:

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

INSTALLATION

Piston Ring Installation:

1. Install rings with manufacturers I.D. mark facing up, to the top of the piston.

CAUTION: Install piston rings in the following order:
a. Oil ring expander.
b. Upper oil ring side rail.
c. Lower oil ring side rail.
d. No. 2 Intermediate piston ring.
e. No. 1 Upper piston ring.

Installing Side Rail:

f. Install the 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 is in position. Do not use a piston ring expander.

2. Install upper side rail first and then the lower side rail.
3. Install No. 2 piston ring and then No. 1 piston ring.

Piston Ring End Gap Position:

4. Position piston ring end gaps as shown.
5. 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.