Chevrolet Workshop Service and Repair Manuals

PISTON RINGS

Ring Groove Depth

Top Compression .......................................................................................................................................................... 4.294-4.424 mm (0.169-0.174 in.)
2nd Compression .......................................................................................................................................................... 4.389-4.519 mm (0.173-0.178 in.)
Oil Control .................................................................................................................................................................... 4.204-4.334 mm (0.165-0.171 in.)

End Gap

Top Compression .......................................................................................................................................................... 0.305-0.559 mm (0.012-0.022 in.)
2nd Compression .......................................................................................................................................................... 0.762-1.016 mm (0.030-0.040 in.)
Oil Control .................................................................................................................................................................... 0.254-0.762 mm (0.010-0.030 in.)

Side Clearance

Top Compression ...................................................................................................................................................... 0.033-0.079 mm (0.0013-0.0031 in.)
2nd Compression ...................................................................................................................................................... 0.033-0.079 mm (0.0013-0.0031 in.)
Oil Control ................................................................................................................................................................ 0.028-0.206 mm (0.0011-0.0081 in.)

Ring Width

Top Compression ...................................................................................................................................................... 1.176-1.197 mm (0.0463-0.0471 in.)
2nd Compression ...................................................................................................................................................... 1.476-1.497 mm (0.0581-0.0589 in.)
Oil Control ................................................................................................................................................................ 2.850-3.002 mm (0.1122-0.1182 in.)

PISTON PIN

Diameter ........................................................................................................................................................... 22.995-23.000 mm (0.90531-0.90551 in.)
Fit in Piston ............................................................................................................................................................... 0.010-0.020 mm (0.0004-0.0008 in.)
Fit in Rod (clearance) ............................................................................................................................................... 0.018-0.043 mm (0.0007-0.0017 in.)

1992 - 1993 (L67) Piston Specifications

PISTON

Piston

Clearance (52 mm from top of piston) ................................................................................................................ 0.020-0.060 mm (0.0008-0.0024 in.)

PISTON RINGS
Ring Groove Depth

Top Compression .......................................................................................................................................................... 4.592-4.722 mm (0.181-0.186 in.)
2nd Compression .......................................................................................................................................................... 4.389-4.519 mm (0.173-0.178 in.)
Oil Control .................................................................................................................................................................... 4.167-4.294 mm (0.164-0.169 in.)

End Gap

Top Compression .......................................................................................................................................................... 0.305-0.559 mm (0.012-0.022 in.)
2nd Compression .......................................................................................................................................................... 0.254-0.635 mm (0.010-0.025 in.)
Oil Control .................................................................................................................................................................... 0.381-1.397 mm (0.015-0.055 in.)

Side Clearance

Top Compression ...................................................................................................................................................... 0.033-0.079 mm (0.0013-0.0031 in.)
2nd Compression ...................................................................................................................................................... 0.033-0.079 mm (0.0013-0.0031 in.)
Oil Control ................................................................................................................................................................ 0.028-0.206 mm (0.0011-0.0081 in.)

Ring Width

Top Compression ...................................................................................................................................................... 1.476-1.497 mm (0.0581-0.0589 in.)
2nd Compression ...................................................................................................................................................... 1.476-1.497 mm (0.0581-0.0589 in.)
Oil Control ................................................................................................................................................................ 2.850-3.002 mm (0.1122-0.1182 in.)

PISTON PIN

Diameter ........................................................................................................................................................... 22.995-23.000 mm (0.90531-0.90551 in.)
Fit in Piston ....................................................................................................................................................... 0.0020-0.0130 mm (0.00008-0.00051 in.)
Fit in Rod (clearance) ....................................................................................................................................... 0.0076-0.0229 mm (0.00030-0.00090 in.)

1994 (L67) Piston Specifications

PISTON

Piston

Clearance (52 mm from top of piston) ................................................................................................................ 0.020-0.060 mm (0.0008-0.0024 in.)

PISTON RINGS
Ring Groove Depth