Piston: Service and Repair

The pistons have been cast and machined to one size and weight. The piston and rod assemblies are matched to weigh the same for engine balance.

Figure 5-Piston Measurements:

Cylinder Bore And Piston Specification Chart:

FITTING PISTONS
Piston and cylinder wall must be clean and dry. Piston diameter should be measured 90 degrees to piston pin at size location shown. Cylinder bores should be measured halfway down the cylinder bore and transverse to the engine crankshaft center line. Refer to Cylinder Bore and Piston Specification Chart. Pistons and cylinder bores should be measured at normal room temperature, 70° F (21° C).

PISTON PINS
The piston pin is full floating and is held in place by lock rings. Pistons and rods are weight matched for balance. Do Not switch pistons with other rods. Piston and Rods are serviced as an assembly for balance.