A4 back on the road

[TM]

Brett-
What is it going to kill if the turbo fails? Only thing I can
think of is damage to the cat. I really don't want to spend another
$1.5k to fix the turbo if possible.

Taka

-----Original Message-----
From: Brett Dikeman [mailto:brett at cloud9.net] 
Sent: Saturday, November 22, 2003 12:44 PM
To: TM
Cc: quattro at audifans.com
Subject: Re: A4 back on the road


>  The turbo impeller got nicked, but didn't lose any blades, we'll
>see if the turbo
>will last.

Apologies if anyone else covered this-

The impeller must be replaced if there's any visible damage- and the 
entire assembly dynamically rebalanced.  Each component balanced, and 
then the whole assembly balanced together in a specific static 
alignment(ie, when it's reassembled in the turbo housing, must be 
exactly the same way).  Reman unit might end up being cheaper, or 
given the number of people upgrading these things, a used unit.

Turbos are unforgiving of being unbalanced; they spin at over 50,000 
rpms- if you're lucky, it will give terrible performance, destroy its 
bearings and seize without taking anything else with it.  If you're 
not...

B
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