So just got my Audi and now when I start it and rev it makes like a squeaking noise the increases with the engine speed. I have no clue what it is, sounds like maybe it has something to do with the turbo as it does not make a sound until about 2.5k the tricky part is it goes away after about one minute and only when the engine has not been on for a while, any guesses? Thanks!

 

its the secondary air pump working. it is there to warm up the engine faster.

 

My thought was the SAP, but the sound should stay the same, & not change with engine RPM. It sounds like a dentist drill, almost like a blown turbo.

If the sound does change with RPM's, then my guess is on a pulley bearing going out.

 

if it is the bering then would it not be a constant shound not only lasting 60-5 seconds depending on the duration between driving

 

Not all the time. If it's the WP bearing, it can make noise when it first starts, then as coolant gets in there, the sound goes away.

 

ok lets say this is the problem how long do i got doc

 

^ untill the WP siezes and breaks the timming belt

 

wow your so helpful i could just kick you in the *****
how can i check this? shaft play?

 

My old MR2 did this, turned out to be the alternator belt. Check to make sure your belt doesnt have cracks or pits in the ribs and also make sure the tensioner is correctly positioned.

 

looking at it this morning it souds like it is comming form the rear of the engine if it was the turbo would it make this noise at idle?