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Why is my car engine making a knocking noise?

Hi everyone, I’ve noticed a knocking noise coming from my car’s engine. Does anyone know why this might be happening? Thanks in advance!


Hey there! A knocking noise usually means there’s an issue with the combustion process in your engine. It could be caused by using low-octane fuel, worn-out spark plugs, or carbon deposits on your valves. Sometimes, it’s also a sign of a more serious problem like a bad rod bearing. You should get it checked out as soon as possible.


I had the same problem with my car a few months ago. In my case, it turned out to be a problem with the ignition timing. If the timing is off, it can cause that knocking sound. Also, make sure your fuel injectors are clean and functioning properly. Best to have a mechanic look at it to be sure.


Hi! Knocking noises can be caused by several things. They could be as simple as poor-quality fuel or more complex issues like a worn-out engine bearing or a problem with the timing belt. Checking your engine’s oil level and quality might also give you some clues. Definitely don’t ignore it, as it could lead to more damage.

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About Dan Hoffman

Dan is a co-founder of Engineswork. He knows everything about internal combustion engines. Ask your questions in comments down below this article - he will be glad to help you anytime.

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