Question about 1991 BMW 5 Series

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Bmw e38 engine whistle noise

I have a really bad whistleing noise in the engine bay but cannot pin point where the noise is coming from

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6ya6ya
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Posted on Jan 02, 2017

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jreprogle7
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SOURCE: Whistle noise inthe front of the engine of bmw z3 2000 2.3

a leak in a hose or a bearing on a motor

Posted on Feb 18, 2012

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mechanicsonl
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SOURCE: Whistle noise in the water pum of bmw z3 2000

have it replaced before any damage occurs

Posted on Feb 18, 2012

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2 Answers

Why do i hear a whistling sound while driving sometimes?


I used to get this on my old car, check the rubber seals around the outside of the windows for small gaps. The air passing over the gap can be causing the noise.

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A whistling noise can be generated by an alternator at high RPM's and indicates a slip ring brush problem or a diode failing . It resembles a frequency whistle.. IT may also be from a leaking gasket and a partially blocked exhaust system from a failed cat converter and at speed and power, the exhaust gas is forced out the hole

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As the engine light came on there should be a fault code stored in the memory that should provide a clue.

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At high speeds, I here a high pitched squeal coming from the passenger side dashboard. Its like the wind is reflrcting off something and it makes this annoying sound. Can you help me figure this out.


I'd check the passenger side mirror first, make sure it is tight to the window frame, no gaps. It causes a wind noise or whistle. It could be from the outside of the truck, try to pin point. Does noise go away with either window down? Does noise get louder turning in one direction (wheel bearing)? Does it get worse then seem better (could be tire noise)? Eliminate fan motor, and radio. Does it get worse with vehicle speed or just engine speed?

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Whistling noise coming from the engine compartment on a 2006 Ford Escape. The noise usually comes and goes. Mostly when the truck is idling or when I accelerate. I've been told it's a vacuum leak. ...


a whistling noise will be a vacuum leak from some point. The Escapes are known for having vacuum issues in the rear of the engine due heat caused from the motor. The lines dry and crack out.

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take rubber hose and place near ear use as stethoscope, pin point noise, and pull apart, till problem is located. buy manual

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There is a seal where the rod from the booster connects to the foot pedal that is probably leaking

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2003 Audi A4 1.9TDi - 6spd


SOUNDS LIKE ONE OF YOUR WHEEL BEARINGS HAVE GONE WEST REPLACE THESE BEFORE YOU GO KOOFING FOR A DEEPER PROBLEM

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Whistling noise coming from engine compartment on 2004 toyota sequoia


Troublkeshoot possible noisy idler pulleys, if they are OK, remove the plastic cobers & check for a noisy timing belt tensioner pulley. Water pumps rarely "whistle"; they grind. But, if you see any evidence of leakage at the weep hole on the water pump impeller shaft, replace the pump regardless. Might as well replace the timing belt whilst you are there, too.

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