danielheren

After my complete cylinder & head update on 91' C2, I have a new sound.

It is a squeal, simillar to a belt squeal. It comes from the bottom side of the engine though. Can't really hear it from the top at all. Not really the middle, but heard on both sides of the bottom. I don't hear it while while listening at the rear during idle. I have to rev the rpm a little, then just as the engine is settles back into idle it squeals. The rpm of the squeal does not sound very fast (not 700 rpm), but mush slower.

Any ideas?

Thanks:

John Boggiano

Power steering belt?

danielheren

Ahhhh,

Where is the power steering unit located in relation to other engine landmarks?

danielheren

In addition, can I use the old classic "stop belt squeal", sprays and what not?

Thomas Linser

Hi Daniel,

if you're standing in front of your engine the belt is on the right hand side on the rear of the engine.
Hope this helped

Grüetzi THOMAS

91C2wrencher

I believe the power steering belt is cogged belt, like a timing belt, and shouldn't squeal? Perhaps its the A/C belt?

danielheren

I'll check all of these today and let you know. I imagine I would hear the AC belt up top fairly well since that is primarily where it is located.

TMH

This sounds eerily familiar to what happened to Surf Twang earlier. A quote from one of his posts:

"Immediately after the 60k service I noticed a high pitched whining noise that I didn't pay much attention to because the Ferrari's I owned in the past also made this kind of noise."

Ended up that he broke the shaft of his alternator, perhaps due to belts being too tight.

Here is the thread: Interesting reading.

Thread

Tom

91C2wrencher

How about that little wheelie thing that runs on the belts?

Surf Twang

It turns out I still have a high-pitched whine even after the repair (new alternator, shaft, belts, etc.).

The berings in the tensioners on the belts can freeze and they make a squeking noise when they do. When it happened to mine it was on the left side. But you should be able to hear it from top if that was the problem.

danielheren

Well,

I had my wife sit in the car and rev it up to about 2500 rpm, then let off the accelerator while I was under it trying to pinpoint the noise.

If you think these cars are loud standing away from it, try crawling underneath.

The sound was too far toward the middle of the car for me to squeeze to. It seems like it's coming from the front of the engine where the transmission (tiptronic) joins.

ckkrause

I don't want to be an alarmist, but failure mode for a torque converter is often signaled by a high pitched whine... However, usually you hear it as the motor revs up as well and not just at idle...and failure is rare. How do I know...I had a Sportomatic in the now distant past!!!

On the other hand, power steering pump noises can seem to come from that area...

-CKKrause

danielheren

Hmmmm,

It does not squeal constantly. Only on the tail end of rev in neutral, or park. I don't know if it happens while driving