My BMW makes like a whistling sound around engine when turned on

ralphy4321 · #1 08-07-2008, 05:57 PM

My BMW X5 2001 4.4 makes like a whistling sound when the engine is on, what could it be. Could it be my belts, also whenever i turn on the car for the first time it makes a loud clank clank noise, not sure what is this noise.

Sponsored Links

mrbmwx5 · #2 08-08-2008, 11:24 PM

dried pullys,belts .try spraying a belts tressing

X5Dawg · #3 08-09-2008, 07:47 PM

Probably no the best forum to present this question...

ralphy4321 · #4 08-12-2008, 04:59 PM

Quote:

Originally Posted by mrbmwx5

dried pullys,belts .try spraying a belts tressing

What should I spray it with?

CharlieHustleX5 · #5 11-22-2008, 10:07 AM

Belt Dressing.

ralphy4321 · #6 12-08-2008, 03:46 PM

Quote:

Originally Posted by CharlieHustleX5

Belt Dressing.

I was told buy a street mechanic that Belt Dressing is not good to spray, it will dry belts and mess up other things in the car, like alternator. is this true?

CharlieHustleX5 · #7 12-08-2008, 06:19 PM

IMO, I wouldn't spray anything on the belts. If you have a whistling sound, its more likely a sign that one of your pully bearings are worn out. But dont spray anything on your belts.

Wayne's World · #8 01-20-2009, 08:02 PM

Its been my experience w/a 318ti, 318is & M3, all E36's that this has been attributed to the PCV valve being clogged or broken.

bmdubbs · #9 01-21-2009, 02:06 AM

or you may have a vacuum leak

Wayne's World · #10 01-27-2009, 03:52 AM

Vacuum leak usually displays itself in the form of a rough idle, SES/Check engine light signaling misfire in a cylinder(s).

But stranger things have happened. I remember that one time I heard a whistling noise coming from under the hood and I got under the car to change the oil and *BAM* there was a whistle - stuck to the inside of my airdam.

Just kidding but when diagnosing 'noises' - it can be at least a hundred different reasons.

Sponsored Links