Piston Ring Installation Procedure

1. Properly orient the oil control ring expander as shown before installation. The ends of the expander must be facing toward the top of the piston.





2. Using a piston ring expander, install the oil control ring assembly using the following procedure:
2.1. Install the expander ring (3).
2.2. Install the two oil scraper rings (4). Expand the rings only enough to clear the piston diameter. Overexpanding the piston rings will distort or crack the rings.

3. Install the second compression ring (2). There is a locating dimple on the 2nd compression ring near the end for identification of the top side. Install the second compression ring with the dimple facing up.
4. Install the top piston (1) ring using the piston ring expander. Make sure you do not overexpand the rings. The top compression ring may be installed with either side up.





5. Once the rings are installed, set the ring gaps for the oil control, second and top rings in the positions shown:
5.1. Oil control ring expander and second compression ring gaps-position 1.
5.2. Upper oil control ring gap-position 2.
5.3. Top compression ring gap-position 3.
5.4. Lower oil control ring gap-position 4.