For 2 months there has been a high pitch jet-like whine from the front of the engine. I changed the PS dark fluid and it seemed to help but not much. When the A/C cycles the noise changes but stays present - even when its turned off. I changed the idler pulley & belt but no change to the sound. If I had to guess which side, I'd say the driver side and don't really suspect the belt tensioner pulley. I'm quite concerned that it may be the A/C compressor (clutch) and would appreciate hearing any advice especially repair options.

Thanks...Dave

First confirm is is an accessory/belt driven component, remove the belt see if it stops.

Yes, the noise stops when I remove the belt.

When I spin all other pulleys, the water pump has a quiet high pitched noise that seems to get louder the faster I spin it (although I can't spin it too fast). The water pump bearing seems tight (no play). The A/C clutch seems ok, but when I spin the pulley behind it, it has a low pitched growl (which I suspect is normal).

I suppose a can of water pump lubricant might be in order or perhaps I should just change the pump?

Thanks ..Dave

The ac pulley should not growl, sounds like the front bearing is bad. Without hearing or feeling this it is all guess work from here,, the w/pump seal can make a slight rubbing noise as you spin it, could be either one. I assume the fan clutch is not locked up?

The fan clutch is free and seems to operate normally. Given the high cost of repair if it's the compressor I think I'll keep driving for a while to let it get a little worse to eliminate any further doubt.

Thanks again...Dave

That ac bearing can be replaced seperately remember