What Causes Engine Timing Chain Noise?

[VioletAnn]

Engine timing chain noise can be caused by several factors including lack of tension in the chain tensioner, elongated timing chain, abnormal wear of the chain guide, or issues with the timing sprocket. The primary function of the timing chain is to drive the engine's valve train, ensuring the intake and exhaust valves open and close at the proper times to allow normal cylinder air intake and exhaust. Solutions for engine timing chain noise: To prevent excessive clearance due to chain wear, the system is equipped with an automatic chain tensioner. This tensioner operates using oil pressure. When there's a malfunction in the lubrication system causing abnormal oil pressure, excessive chain clearance may occur, resulting in noise. Timely inspection and repair are necessary to prevent excessive clearance that could lead to chain skipping and engine damage. Typically, noise caused by low oil pressure is more noticeable at idle and diminishes when accelerating.