Buick Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Ring End Gap

First Compression Ring .............................................................................................................................................  0.25 - 0.46 mm (0.010 - 0.018 inch)
Second Compression Ring ........................................................................................................................................  0.58 - 0.84 mm (0.023 - 0.033 inch)
Oil Control Ring ....................................................................................................................................................  0.254 - 0.762 mm (0.010 - 0.030 inch)

Piston Ring to Groove Clearance

First Compression Ring .....................................................................................................................................  0.033 - 0.079 mm (0.0013 - 0.0031 inch)
Second Compression Ring ................................................................................................................................  0.033 - 0.079 mm (0.0013 - 0.0031 inch)
Oil Control Ring ................................................................................................................................................  0.023 - 0.201 mm (0.0009 - 0.0079 inch)

Piston Ring Thickness

First Compression Ring .....................................................................................................................................  1.176 - 1.197 mm (0.0463 - 0.0471 inch)
Second Compression Ring ..............................................................................................................................  1.1476 - 1.497 mm (0.0581 - 0.0589 inch)
Oil Control Ring ....................................................................................................................................................  1.854 - 2.007 mm (0.073 - 0.079 inch)