Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Piston Identification

Piston identification

Piston and cylinder dimensions

Size Piston Cylinder Bore
Standard 76.48 mm 76.51mm
1st Oversized 76.73 mm 76.76 mm
2nd Oversized 76.96 mm 77.01 mm
3rd Oversized 77.48 mm 77.51 mm

CAUTION: Oversized pistons for repair of hydraulic lifter engines are now manufactured with 15° chamfer. During repairs using oversized pistons, only used chamfered pistons to prevent pistons from hitting cylinder head gasket.