![]() ![]() The bearings can heat up and seize, the connecting rods can break, or the pistons can break apart. There is a high risk of damaging the engine permanently. Some drivers will continue to drive their vehicles. New gaskets are needed, along with several other parts. ![]() Usually, all bearings are replaced and perhaps the pistons as well if there is damage. There is a significant expense involved since the engine must be removed from the vehicle, the head removed along with the oil pan. Even a thousandth of an inch difference can cause rod knock to occur and piston slap.Ĭaught early enough, an engine can be repaired. ![]() Your engine will make a distinct sound of knocking and or slapping of the pistons. Once the rod bearing surface begins to wear, usually from lack of oil lubrication, engine rod knocking sounds, or piston slap or both can occur. Low oil conditions can be caused by a loose oil cap, drained oil, and low oil pressure. There are bearings at both ends of the connecting rod, engineered to very tight tolerances and lubricated with oil.Īge can cause these bearings to wear as well as low oil conditions. The connecting rod is connected to the crankshaft and the piston. Basic engine design incorporates a crankshaft that rotates inside your engine. ![]()
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