Operation CHARM: Car repair manuals for everyone.

Piston, Engine

Diameter Coded Red 3.81082 - 2.81031
Coded Blue 3.81133 - 3.81082
Coded Yellow 3.81184 - 3.81133
Piston-to-Bore Clearance (Uncoated Clearance) 0.00071 - 0.00173
I.D. Code of Service Piston Bore Diameter
When replacing pistons, measure the cylinder bore as described in Section 303-00. Install the service piston matched to the piston bore diameter above.
Red 3.81204 - 3.811528
Blue 3.81255 - 3.81204
Yellow 3.81306 - 3.81255
Ring Groove Width Compression (Top) 0.0606 - 0.0598
Compression (Bottom) 0.0606 - 0.0598
Oil 0.12001 - 0.11929