Question about 2001 Saturn SL

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Engine makes loud humming noise when reved up and being driven

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I would get it to a real mechanic and ask him about a failing timing chain. If that is ruled out next I would check the power steering pump.

Posted on Sep 29, 2009

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I drive a 2011 Dodge Ram. When I start the truck it starts with a loud rotating noise. As I start to drive it has a very loud humming noise and gets louder as I accelerate.


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humming could be the motor turning round but not engaging with the flywheel. you can check this by hitting the starter with a spanner a few times. if it starts up after you have a sticking solenoid. had to do this a few times my self to get engine started. replace starter as soon as possible if it works. usually happens if you not driven car for awhile.. or you do a lot of starting and small trips.

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Chances are it's the tires rather than the engine.
Does the hum diminish if you back off the accelerator? If yes, then look at rear axle pinion bearing. If no, then feel across the tires. They should be smooth across. If they're rough, they will make a loud howling noise.


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