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Car Sounds
Fuel and Engines
Nissan Altima

What does a slight knock in the engine mean?


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Wiki User
2007-02-17 15:34:10
2007-02-17 15:34:10

It means something bad is about to happen to the engine. Take it to a garage. 1. check your oil first 2. If oil is right, check oil pressure. 3. If oil pressure is not right your oil pump is going out. other than that, a knocking generally means a bad main or crank bearing.

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a lot of times its your timing belt, if its more of a knock its could be a rod knock

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The knock sensor is located under the intake manifold on the passenger side of the engine. It can be accessed from under the vehicle. Look above and to the slight left of the oil filter on the back of the engine. The knock sensor will resemble a small battery terminal with a bolt through to the engine.

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The knock sensor just advances and retards the engine timing only. If there is a noise in the engine then you have engine are valve train problems. The knock sensor will not make the engine knock.


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