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Connecting rod and piston from a car engine. A connecting rod for an internal combustion engine consists of the 'big end', 'rod' and 'small end'. The small end attaches to the gudgeon pin (also called 'piston pin' or 'wrist pin' in the U.S.), which allows for rotation between the connecting rod and the piston.
The issue is apparently caused by a bearing failure, which in turn "may result in either engine seizure or breaching of the engine block by the connecting rod." ... Most cars on the group's list ...
A well-known problem with the S85 is premature rod bearing wear, which can occur around 80,000 km or roughly 50,000 miles. The root cause is attributed to the engine’s high-revving nature, tight tolerances and a lack of clearance between the rod bearings and the rod journals.
Part of the 1936 production and all production from 1937 to the end of flathead V8 production had both replaceable shell main bearings and connecting rod inserts, enabling straightforward and low cost rebuilding, another reason why the Ford was a favorite of amateur mechanics. These shell main bearings are made of a cadmium silver alloy. [11]
Crankshaft, pistons and connecting rods for a typical internal combustion engine Marine engine crankshafts from 1942. The crankshaft is located within the engine block and held in place via main bearings which allow the crankshaft to rotate within the block. [3] The up-down motion of each piston is transferred to the crankshaft via connecting ...
The crankpin connects to the larger end of the connecting rod for each cylinder. This end of the connecting rod is called the "big end", as opposed to the "small end" or "little end" (which connects to the wrist/gudgeon pin in the piston). The bearing which allows the crankpin to rotate around its shaft is called the "rod bearing". [5]
Rated just 11th out of 15 overall in luxury compact cars, the car received a 2 out of 5 rating in predicted reliability and a 3 out of 5 in predicted owner satisfaction.
Excess bearing clearance increases the pressure loss between the first and last bearing in a series. Depending on condition, an engine may have acceptable gauge pressure, and still only 5 psi pressure at one connecting rod, which will fail under high load. The pressure is actually created by the resistance to the flow of the oil around the ...