Procedures

FITTING PISTONS







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. Piston and cylinder wall must be clean and dry.

Piston diameter should be measured 90 degrees to piston pin at size location shown in (Fig. 66). Cylinder bores should be measured halfway down the cylinder bore and transverse to the engine crankshaft center line. Refer to Specifications. Specifications
Pistons and cylinder bores should be measured at normal room temperature, 70°F (21°C).

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