Piston Ring(s) - Installation

INSTALLATION




1. Measure clearance of piston rings to the cylinder bore and 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.




2. Install oil ring expander.

Install the side rail 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 during this step .

3. Install lower side rail first and then the upper side rail.





NOTE: The No. 1 and No. 2 piston rings have a different cross section. Ensure No. 2 ring is installed with manufacturers I.D. mark (dot) facing up, towards top of the piston.





NOTE: Be sure to use a ring expander to install piston rings.

4. Install No. 2 piston ring and then No. 1 piston ring.




5. Position oil ring expander gap (5) as shown. Staggering ring gap is important for oil control.
6. Position piston lower side rail end gap (4) as shown.
7. Position piston upper side rail end gap (1) as shown.
8. Position piston ring #2 (5) end gap as shown.
9. Position piston ring #1 (2) end gap as shown.