Pontiac Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Ring End Gap

First Compression Ring ...............................................................................................................................................    0.15-0.36 mm 0.006-0.014 in
Second Compression Ring .......................................................................................................................................    0.48-0.74 mm 0.0188-0.0291 in
Oil Control Ring ......................................................................................................................................................    0.25-0.77 mm 0.0098-0.0303 in

Piston Ring to Groove Clearance

First Compression Ring ...........................................................................................................................................    0.04-0.086 mm 0.002-0.0033 in
Second Compression Ring .........................................................................................................................................    0.04-0.08 mm 0.002-0.0031 in
Oil Control Ring .................................................................................................................................................    0.07-0.095 mm    0.0028-0.0037 in

Piston Ring Thickness

First Compression Ring ...........................................................................................................................................    1.164-1.190 mm 0.046-0.047 in
Second Compression Ring ...................................................................................................................................    1.460-1.490 mm 0.0574-0.0586 in
Oil Control Ring - Maximum .......................................................................................................................................................    2.960 mm 0.116 in