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Whining noise from engine only when its hot infiniti i35 2002

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Without more info. All i can suggest is get a stethoscope, or lenght of rubber tube, and place in vicinity { BE CAREFUL} of noise. Shine light & see if you can notice the pulleys { where the belt goes] moving smoothly. Notice any pulleys that may be moving a bit erratic at idle

Posted on Apr 19, 2014


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Could be several things.
You could take a section of heater hose and use it like a stethoscope to listen for the noise while the engine is running.
Once you narrow down the location you could take the belt off for that accessory to confirm.

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Only when it is hot out a loud humming noise starts in the engine

I suggest that you open the hood (when the engine is hot) and try to pinpoint the source of the noise. Check the power steering pump- these sometimes make a noise that could be described as a hum or whine. The alternator and belt idler or tensioner are other things to check. An automotive-type stethoscope might be useful for tracking down the noise.

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I have a 01 ford escort zx2 and it is making a whining noise from under the hood i have replaced the water pump and it still whines and the heater will start off blowing hot air but when you go several...

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