Pontiac Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Ring End Gap - First Compression Ring ............................................................................................................  0.20 - 0.40 mm (0.008 - 0.016 inch)
Piston Ring End Gap - Second Compression Ring .......................................................................................................  0.35 - 0.55 mm (0.014 - 0.022 inch)
Piston Ring End Gap - Oil Control Ring - Rails ...........................................................................................................  0.25 - 0.76 mm (0.010 - 0.030 inch)
Piston Ring to Groove Clearance - First Compression Ring .....................................................................................  0.04 - 0.08 mm (0.0015 - 0.0031 inch)
Piston Ring to Groove Clearance - Second Compression Ring .............................................................................  0.030 - 0.069 mm (0.0012 - 0.0027 inch)
Piston Ring to Groove Clearance - Oil Control Ring ............................................................................................  0.090 - 0.106 mm (0.0035 - 0.0042 inch)
Piston Ring Thickness - First Compression Ring ..................................................................................................  1.170 - 1.190 mm (0.0461 - 0.0469 inch)
Piston Ring Thickness - Second Compression Ring .............................................................................................  1.471 - 1.490 mm (0.0579 - 0.0587 inch)
Piston Ring Thickness - Oil Control Ring - Rail - Maximum ............................................................................................................  0.43 mm (0.0169 inch)
Piston Ring Thickness - Oil Control Ring - Spacer ...............................................................................................  1.574 - 1.651 mm (0.0620 - 0.0650 inch)