Piston Ring Installation Procedure
WARNING: This page is about a different variant/trim than selected.
Properly orient the oil control ring (1) expander before installation. The ends of the expander must be facing toward the top of the piston.
The upper and lower compression rings have either a dimple (1) or the word "TOP" (2) on the top side of the ring. The rings should be installed so that either of these marks are facing the top of the piston.
Using a piston ring expander, install the oil control ring assembly using the following procedure:
- Install the expander ring (3).
- Install the 2 oil scraper rings (4). Expand the rings only enough to clear the piston diameter. Overexpanding the piston rings will distort or crack the rings.
- Install the lower compression piston ring (2) onto the piston with the mark facing the top of the piston.
- Install the upper compression piston ring (1) onto the piston with the mark facing the top of the piston, if required.
Once the rings (1, 2, 3, 5) are installed, set the ring gaps for the oil control, second and top ring as follows. Use the piston location arrow for reference.
- Piston Compression Lower Ring (1) 30 degrees
- Piston Compression Upper Ring (2) 30 degrees
- Piston Oil Ring Rail- Top Ring (3)
- Piston Oil Ring Rail Spacer (4)
- Piston Oil Ring Rail- Second Ring (5)
NOTE:
The lower compression piston ring (2) is thicker and will not fit in the upper compression rings (1) position.