Piston & Rod Assembly
- Ensure connecting rod and connecting rod cap are marked with matching cylinder number for reassembly reference. Note direction of piston installation on connecting rod. See Fig 1.
- When removing piston from connecting rod, remove snap ring from piston. Heat piston to 140°F (60°C) in water. Remove piston pin. Separate piston from connecting rod.
- Ensure piston pin diameter is within specification. See PISTONS, PINS & RINGS table under ENGINE SPECIFICATIONS.
- Ensure connecting rod piston pin bushing bore diameter, and connecting rod bend and twist are within specification. See CONNECTING RODS table under ENGINE SPECIFICATIONS.
- Bushing in connecting rod can be replaced if bore diameter is not within specification. Ensure bushing oil holes align with connecting rod oil holes. Bushing must be honed to obtain correct piston pin-to-rod clearance.
- To reassemble, install piston so front mark on top of piston aligns with front mark on connecting rod. See Fig 1. Install NEW snap ring in piston. Heat piston to 140°F (60°C) in water.NOTE: With piston at 140°F (60°C), thumb pressure should be able to be press piston pin into piston.
- Coat piston pin with engine oil. Install piston pin and remaining snap ring.