Wrist pins are assembled in the pistons with a metal to metal fit. When properly selected the pin can be pushed into the piston with a slight pressure of the hand.

Wrist pins are selected to give a clearance of .0005″ in the connecting rod.

The upper end of the connecting rod has .040″ total side play between the wrist pin bosses in the piston.

The lower end of the connecting rod has .008″ to .012″ end play on the crankshaft.

Time gears are fitted with a back lash of not less than .003″ or more than .005″.

Main bearings in cylinder block are line reamed .001″ larger than the diameter of the crankshaft main bearings.

Crankshafts are fitted with an end clearance of .004″ to .007″.