Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Piston Ring: Specifications
Ring Gap Clearance
Top Compression Ring ..................................................................................................................................... 0.229 to 0.610 mm (0.0090 to 0.0240 in.)
2nd Compression Ring ..................................................................................................................................... 0.483 to 0.965 mm (0.0190 to 0.0380 in.)
Oil Control Steel Rails ......................................................................................................................................... 0.254 to 1.500 mm (0.010 to 0.060 in.)
Ring Side Clearance
Compression Rings ............................................................................................................................................. 0.042 to 0.084 mm (0.0017 to 0.033 in.)
Oil Control Ring ................................................................................................................................................... 0.06 to 0.21 mm (0.0024 to 0.0083 in.)
Piston Ring Groove Height
Compression Rings ........................................................................................................................................... 1.540 to 1.555 mm (0.0602 to 0.0612 in.)
Oil Control Ring ............................................................................................................................................... 4.035 to 4.060 mm (0.1589 to 0.1598 in.)
Piston Ring Groove Diameter
Compression Ring ................................................................................................................................................ 87.78 to 87.90 mm (3.456 to 3.461 in.)
Oil Control Ring ................................................................................................................................................... 87.50 to 87.75 mm (3.445 to 3.455 in.)
