Fitting Rings
Position piston rings so that identification marks ("N", "NPR", "T" or "TOP") face upward. Ensure rings turn freely in ring grooves. Piston ring size may be identified using mark on rings. See Figure.
PISTON RING IDENTIFICATION
| Application | Marking/Color Code | |
|---|---|---|
| Standard | ||
| 1st Compression Ring | None | |
| 2nd Compression Ring | None | |
| Oil Control Ring | None | |
| 0.002" (.5 mm) Oversize | ||
| 1st Compression Ring | 50 | |
| 2nd Compression Ring | 50 | |
| Oil Control Ring | Blue | |
| 0.004" (1.0 mm) Oversize | ||
| 1st Compression Ring | 100 | |
| 2nd Compression Ring | 100 | |
| Oil Control Ring | Yellow | |