A4 2.0TFSI Screeching noise

H

heli_madken

Registered User
Joined
Mar 26, 2008
Messages
117
Reaction score
0
Points
16
Location
NULL
Hi Everyone,

I have what sounds like a big problem which I think may be Turbo bearings, here are the symptoms - Everything fine when cold, engine idles and revs fine with no noises.

When she gets warm I get a horrible screeching noise at idle and on the move when taking my foot off the gas, under load she is fine.

No appreciable loss of power but idle RPM rises to around 1400 and hunts

Cant really pinpoint the noise, I am guessing its Turbo related with the change in RPM, but reading around most failures seem to result in noise when revving the engine not when off throttle, engine management light comes on when the noise is there but does go off when starting from cold

Any ideas? car has been regularly serviced with an Oil change in March

Any help would be appreciated
Ken
 
Just a thought, if it was the turbo bearings would I expect to see a lot of smoke from the exhaust? any help would be appreciated
 
It's not the alternator belt or something silly like that? Also get it scanned with Vcds software, this will show up any errors that have been logged when your engine management light came on.
 
Am no expert Mate...but if your turbo was knackered you would know all about it....White smoke from your exhaust if it's gubbed. Can you remove the oil cap at idle?...if not, it might be your PCV valve. My engine revs were hunting and I was getting a EML light on and poor mpg.....it cured it. Lots of issues and quite a few symptoms when the PCV goes. One is a high pitch whistling sound. You could also try some belt dressing spray to eliminate the V belt being the issue. ......Have you had it checked for fault codes yet?

Cheers
A
 
Last edited:
Thanks A, I have to admit that the noise in this video is exactly the same I am convinced of it - audi engine noise.m4v - YouTube will take a look tonight and let you know, one thing why would it happen only when she is warm?

Is the round black assembly the PCV valve?

Thank you for the help really appreciated, Ken
 
heli_madken said:
Thanks A, I have to admit that the noise in this video is exactly the same I am convinced of it - audi engine noise.m4v - YouTube will take a look tonight and let you know, one thing why would it happen only when she is warm?

Is the round black assembly the PCV valve?

Thank you for the help really appreciated, Ken
Click to expand...

its the Air con pulley. the exactly same thing is happening to mine, Exactly
my mechanic says it is a common fault with the air con pulley

getting mine sorted next week
 
Thanks for your help, it looks like Molnboman is spot on thank you, when I checked last night by running the engine it was difficult to remove the oil cap and when I did air was sucked into the engine, new PCV on order, thanks for your help, Ken
 
You must log in or register to reply here.

Similar threads

B
ticking noise 2.0tfsi
Replies
6
Views
7K
brownie 25
B
S
a4 2.0tfsi
Replies
3
Views
1K
Marrow
M
Ash92
A4 2.0tfsi BGB
Replies
33
Views
16K
mathew lisett
M
W
A4 b7 2.0tfsi Exhaust
Replies
0
Views
861
westiebilly11
W
Thochall
A4 2.0tfsi quattro lacking...
Replies
108
Views
7K
Ricky Burrows
Ricky Burrows
Top
Back