Standard Procedure-Piston Ring Fitting
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
- Wipe the cylinder bore clean.
- Using a piston, to ensure that the ring is squared in the cylinder bore, slide the ring downward into the cylinder to a position 12 mm (0.50 in.) from the bottom of the cylinder bore.
- Using a feeler gauge (1), check the ring end gap. Replace any rings not within specification.
Ring Position Ring End Gap No. 1 (top) Ring 0.22 - 0.37 mm (0.009 - 0.015 in.) No. 2 (center) Ring 0.27 - 0.42 mm (0.011 - 0.017 in.) Oil Control Ring (Steel Rail) 0.15 - 0.66 mm (0.006- 0.26 in.) - Clean the piston ring grooves. Remove any nicks or burrs.
- Measure the ring side clearance as shown in illustration. Make sure the feeler gauge (1) fits snugly between the ring land and the ring. Replace any ring not within specification.
| Ring Position | Ring Side Clearance |
|---|---|
| No. 1 (top) Ring | 0.025 - 0.033 mm (0.0010 - 0.0013 in.) |
| No. 2 (center) Ring | 0.030 - 0.078 mm (0.0012 - 0.0031 in.) |
| Oil Control Ring (Steel Rails) | 0.007 - 0.173 mm (.0003 - 0.0068 in.) |