What Causes the Engine to Make a Clanking Sound?

[BraxtonLynn]

Engine abnormal noise causes are as follows: Insufficient engine oil: Leads to inadequate lubrication of components, resulting in wear sounds. Adding engine oil can resolve the issue. Poor fuel combustion: Low injection pressure, injector dripping, poor fuel atomization, and delayed fuel supply timing can all cause poor combustion leading to engine knocking. Remove and inspect the injector for adjustment, adjust fuel supply timing, and replace parts if necessary to meet specifications. Premature fuel supply timing: Fuel injection starts before the piston reaches the designated position, causing premature combustion. High-pressure gas in the cylinder impacts the piston, producing rhythmic sounds. Throttling down makes knocking obvious. Adjusting the fuel injection advance angle can solve the problem.