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      06-18-2012, 05:11 AM   #3
335DEE
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Drives: M3 DCT
Join Date: Feb 2009
Location: England

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How very thorough ! . I'm interested in the
Quote:
Originally Posted by HighlandPete View Post
The turbine control valve opens a bypass channel on the exhaust side
and where or what this device is and if it is possible to service or replace.
I have just renewed the EPDW's and vac hoses but do not think this bypass channel is opening correctly. Slight turbine chatter on lift off especially when cold and a "CHAIO" sound , also spooling up doesn't quite sound right ( no nice smooth sounding hiss increasing in pitch ) sounds more hollow is that's a good word to describe. BTW this isn't pedal to the metal stuff , but very low revs and slow speeds.
Appreciate 0