Name that tune! Well, name that nasty engine noise...

[pothole]

My 2.5L manual Box has developed a nasty squeaking noise that appears to be coming from the drive belt / one of the pulleys or components on the drive belt. I've attached a short sound clip in a zip file (the forum would not allow me to attach the .mp4 file unzipped for whatever reason) recorded with the car running in 4th at low revs to keep the engine noise down and make the sound clearer. The sound is recorded with the cabin engine cover removed and the engine and drive belt exposed. It does make the noise when blipping the throttle with the car in neutral, but you get a lot of engine noise doing that, hence the on-the-move run with the car in 4th.

Engine otherwise appears to be running normally and producing good power.

Diagnosis, anyone?

20101105 184939.mp3

Edited November 6, 2010 by Loren
made audio common format

[pk2]

Might try taking the belt off and spinning all the pullys by hand. If that dosn't tell you anything, put a socket extension on a fast electric drill and withe the right size socket for each component on the belt and wind it up..

I think your prob is a seized bearing on the pulley circuit causing the belt to screech. You can also look for "skid markes on the pulleys. Could also be a really winy bearing (electric drill thing should tell you that.

Don't drive to far from home anymore.

PK

[pothole]

Yeah, I'm basically not driving it. I will have to drive it about 10 miles to my local shop on Tuesday, but that's the only driving I'll be doing.

[Loren]

Bad pulley or water pump (or in a few rare cases - both).

[pk2]

Yeah, I'm basically not driving it. I will have to drive it about 10 miles to my local shop on Tuesday, but that's the only driving I'll be doing.

IF you drive at really low RPM's you might make it. If the screech stops, best not roll on, no water pump (among others less critical things.

PK

[pothole]

All the pulleys and wheels still appear to be turning fine. I will drive over with care and keep and eye on everything. I've stop immediately if I have any doubts.

[infocusf8]

Same exact sound my water pump was making when it went out. Had the car trucked to my repair shop and a new pump made it go away. Porsche wp's are cheaply made and third party are worse so if you replace use OEM/

[pothole]

For the record, the top idler pulley and the crankshaft pulley have been replaced and all appears to be well.

[phillipj]

Glad you got it sorted..:clapping:

Edited November 12, 2010 by phillipj

[yuyokatana]

I got your solution, I had the same exact noise. 1 of your plugs is loose....