Connecting Rod: Service and Repair

Fig. 28 Piston & rod assembly:

Fig. 29 Piston & rod assembly:

Fig. 35 Piston & rod assembly. V6-232:

Lubricate all parts with light engine oil. Position the connecting rod in the piston and push the pin into place, Figs. 33, 34 and 35. Insert new piston pin retainers (when used) by spiralling them into the piston with the fingers. Do not use pliers.
Replacement pistons for the following 6-300 equipped vehicles have an increased ring land, which raises the top compression ring .035 inch: 1980-81 E & F-100-250 & Bronco except heavy duty. Before installing the new piston, the cylinder ridge must be removed to ensure that the top compression ring does not contact the ridge or deposits formed at the top of the cylinder bore. When removing the ridge, do not cut into the ring travel area more than {1/32} inch.