Big-end bearing failure is indicated by a knocking from within the crankcase and a slight drop in oil pressure. Examine the big-end bearing surfaces for pitting and scoring, and renew the shells according to the specified sizes. If the
Crankshaft has been reground, the correct undersize big-end shell bearings will be supplied by the repairer. If there is any suspicion that a connecting rod is bent or twisted, it must be replaced with one of similar weight, ensuring that the new rod is within 0.14 oz (4 g) of the original component's weight without bearing shells. The connecting rod small end bush can be pressed out and a new one installed, ensuring that the seam in the bush is at 90° to the small oil hole for correct alignment of the oil drillings, with no reaming required after installation. Measurement of the big-end bearing clearances can be performed similarly to the method used for main bearings, tightening the securing nuts on the cap bolts to 38 lb/ft (53 Nm).