Cadillac Workshop Service and Repair Manuals

Piston: Specifications

Piston Diameter @ 42 mm (1.6353 inch) Below Crown ...................................................................................  92.957 - 92.972 mm (3.6597 - 3.6603 inch)
Piston Pin Bore Diameter ..................................................................................................................................  23.002 - 23.007 mm (0.9056 - 0.9058 inch)
Piston Ring Groove Inside Diameter

First Compression Ring .................................................................................................................................  84.750 - 85.000 mm (3.3366 - 3.3464 inch)
Second Compression Ring ............................................................................................................................  83.400 - 83.650 mm (3.2835 - 3.2933 inch)
Oil Control Ring ............................................................................................................................................  85.670 - 85.920 mm (3.3728 - 3.3827 inch)

Piston Ring Groove Width

First Compression Ring .....................................................................................................................................  1.230 - 1.255 mm (0.0484 - 0.0494 inch)
Second Compression Ring ................................................................................................................................  1.530 - 1.555 mm (0.0602 - 0.0612 inch)
Oil Control Ring ................................................................................................................................................  2.530 - 2.555 mm (0.0996 - 0.1006 inch)

Piston to Bore Clearance .......................................................................................................................................  0.020 - 0.051 mm (0.0008 - 0.0020 inch)