What is a rod knock?

A rod knock refers to a common issue in internal combustion engines that occurs when there is a problem with one or more of the connecting rod bearings. The connecting rod is a crucial component that connects the piston to the crankshaft and allows for the transfer of energy from the piston to the crankshaft to drive the vehicle.

When a rod knock occurs, it typically produces a knocking or tapping sound that increases in intensity as the engine speed increases. This noise is caused by the excessive clearance or wear in the connecting rod bearing, leading to the rod bearing making contact with the crankshaft journal. This can result in damage to the crankshaft, connecting rod, and other engine components if not addressed promptly.

Rod knocks are often caused by a lack of lubrication, improper assembly, poor maintenance, or high engine temperatures. If left untreated, a rod knock can lead to catastrophic engine failure and significant repair costs. It is essential to address this issue promptly by inspecting and replacing the damaged components to prevent further damage to the engine.