Lincoln Workshop Service and Repair Manuals

Piston Ring: Specifications

Piston Rings 

Ring end gap

Compression

(top, gauge diameter) ......................................................................................................................................... 0.15-0.25 mm (0.0059-0.0098 in)
(bottom, gauge diameter) ................................................................................................................................... 0.30-0.55 mm (0.0118-0.0216 in)

Oil ring (steel rail, gauge diameter) ......................................................................................................................... 0.15-0.45 mm (0.0059-0.0177 in)

Ring groove width

Compression

(top) ................................................................................................................................................................. 1.230-1.25 mm (0.0484-0.0492 in)
(bottom) ........................................................................................................................................................... 1.530-1.55 mm (0.0602-0.0610 in)

Oil ring ..................................................................................................................................................................... 2.53-2.55 mm (0.0996-0.1003 in)

Ring width

Upper comp ring ...................................................................................................................................................... 1.17-1.19 mm (0.0460-0.0468 in)
Lower comp ring ...................................................................................................................................................... 1.47-1.49 mm (0.0578-0.0586 in)

Ring-to-groove clearance (upper and lower compression rings) ................................................................................ 0.040-0.080 mm (0.0015-0.0031 in)