Piston Ring, Engine

Engine Block Specifications

Piston Service Diameter
(Select Fit Designation Stamped on Top of Piston)
(8) 85.940-85.950 (3.3834-3.3828 inches)
(99) 85.950-85.960 (3.3838-3.3842 inches)
(00) 85.960-85.970 (3.3842-3.3846 inches)
(01) 85.970-85.980 (3.3846-3.3850 inches)
(02) 85.980-85.990 (3.3850-3.3854 inches)
(7 + 0.5) Oversize 86.430-86.440 (3.4027-3.4031 inches)
Piston Bore Clearance 0.025-0.045 (0.0010-0.0018 inches)
Piston Pin Diameter 21 (0.8267 inches)
Clearance in Piston 0.003-0.008 (0.0001-0.0003 inches)

Piston Ring
Compression Rings
Thickness 1.5 (0.0590 inches)
Ring Groove Clearance 0.02-0.04 (0.0008-0.0015 inches)
Ring Gap 0.30-0.50 (0.0118-0.0196 inches)
Oil Ring
Thickness 3.0 (0.1181 inches)
Ring Groove Clearance 0.01-0.03 (0.0004-0.0012 inches)
Ring Gap 0.40-1.40 (0.0157-0.0551 inches)