Connecting rod alignment and bearings (l) Check the connecting rod for evidence of cracks, especially cracks in the fillets of its small and big ends. Replace the rod if any cral:k is noted in the fillets. f t 100 (2) Mount each connecting rod in the connecting rod aligner and check for bend and twist as shown below. In a twisted connecting rod, the bearing is not trued to the small end bushing. Such a rod must be corrected with the use of a press. a. Checking the connect· ing rod for bend b. Checking the connect· (3) If the connecting rod aligner is not available, the rod may be checked as follows:
Checking connecting rod ing rod for twist (a) To check the rod for bend, measure "c" and "2" as shown in the figur~ "a." If the measure- ment at "c" is larger than 0.05 mm per 100 mm (0.00197 in. per 3.937 in.) of" 2," straighten the rod with the use of a press. Checking connecting rod for bend (b) To check the rod for twist, measure "c" as shown in the figure "b." If the measurement at "C" is larger than 0.05 mm per 100 mm (0.00197 in. per 3.937 in.) of "2," correct the rod. Checking connecting rod for twist -25 -