PDA

View Full Version : Locating squeal/whistle sound


prophecy
06-25-2006, 12:40 PM
Ive got a squeal/whisteling type sound coming from somewhere under the hood, not sure what its coming from. Anyone know the steps to find the source?

There is also a significant decrease in rpm's whenever i turn something on like headlights or the air blower/conditioning. not sure if its related
M52 POWER!
06-25-2006, 12:43 PM
Prolyl a pulleys bearing going bad. If it is fix it asap, they can sieze and then melt the belts and you got bigger problems!
TheDarkSide
06-25-2006, 01:56 PM
Jeff has trick with a crayon...
The Weiner
06-25-2006, 08:43 PM
whoa that was a hard one put two and two togther and what do you get....... **** idunno 5?
silver-e34
06-25-2006, 11:45 PM
more than likely its your alternator going bad or your tensioner pulley
///Mental
06-26-2006, 04:22 AM
Jeff has trick with a crayon...

I LOVE THAT TRICK!!! no but really, its awesome! :woot:
TheDarkSide
06-28-2006, 12:38 PM
Bubba Rub? :lmao:
LynxZ3r0
07-22-2006, 02:23 PM
Little late on this, but anyways...

Tensioner pulleys squeek like crazy on BMW engines after very few miles. My Z3 did it at 60k, my M has started to do it at 23k.

Will not break/destroy anything as long as it's just sqeeling a little bit. If it gets super loud or anything changes, it might need a looking at, but otherwise just annoying as Hell.
prophecy
07-23-2006, 09:43 AM
thanks i'll try pulling the tensioners off the parts car.. even though the motor is reserved

then at least ill know what needs replaced
944attack
07-23-2006, 11:49 AM
it may also be something other than pulleys or belts, for instance even a small vaccuum hose that has been knocked off will whistle, and can cause all sorts of problems. Sometimes vaccuum hoses lead to electrical components for various reasons, so be sure to check them all for splits, cracks, and loose or missing ends!
carguy101
07-23-2006, 07:48 PM
Could it be the a/c compressor? I had that problem on my dad's Jag it sounded like belts but then it ended up bein the compressor bearings. $$$ but I know it's not German but a possibility? maybe
944attack
07-23-2006, 11:24 PM
Could it be the a/c compressor? I had that problem on my dad's Jag it sounded like belts but then it ended up bein the compressor bearings. $$$ but I know it's not German but a possibility? maybe

yep, good point! my dad's old e24 did that too, i forgot all about it.