intermittent high pitch squealing -- not belts

[jessejester117]

My 900 has developed a high pitch squeal coming from the engine bay that is more pronounced at times, and silent other times. I replaced all the belts, and checked the pulley wheels while I was in there, and they didn't seem to be going bad or anything, but this all made no difference to the sound.

It occurs briefly when accelerating very hard and turning sharply, but is most pronounced when braking at low speeds, and continues to squeal even after the car is stopped. It will go away shortly after releasing the brake, and definitely after giving the car a little gas. It will even squeal while simply sitting still, and pushing the brake pedal in.

I've looked around in the engine compartment with a friend pushing the brake, but can't tell for the life of me where the squeal is coming from, as its so high pitched. I'm at a loss, any ideas?

[fid04]

Have you checked the rubber damper on the crankshaft pulley?Mark the inner and outer steel parts and see if your marks still line up with each other after driving. A piece of tubing can be used as a stethoscope to isolate a noise.