WG problems - testing

[Pasqualoni, James E]

Ah, the KH motor?  I would not worry so much about the diaphragm, as I would
the wg frequency valve.  The diaphragms are made of Kevlar and are very
durable.  The wgfv has a tendency to fail, and it is also easy to install it
incorrectly.  You may be hearing normal boost pressure blow-off by the wg.

First thing I would do though, is to make sure your boost pressure is up to
spec (max 1.3-1.4 bar on the KH?).  No over/under boost problems, no wg/wgfv
issues ;~}

HTH,
Jim

-----Original Message-----
From: Ameer Antar [mailto:antar at comcast.net] 
Sent: Thursday, December 02, 2004 10:43 AM
To: Pasqualoni, James E
Cc: Quattro list
Subject: RE: WG problems - testing


Ya, I'm worried due to the noise. I haven't tested the boost yet as this is
a freshly rebuilt motor and I don't want to strain it yet till I get at
least a couple thousand miles on it. (I also still have to bleed the brake
system after replacing the MC). I thought that a bad WG diaphragm would
cause overboost, but I'm not sure if this would cause a leaking sound.

Sorry I should have mentioned this is for a '85 5kT, pretty much the same as
the MC setup. Thanks.

-Ameer

----Original Message----

To: "'antar at comcast.net'" <antar at comcast.net>
From: "Pasqualoni, James E" <james.pasqualoni at gs.com>
Date: 12/2/2004 9:56:53 AM
Subject: RE:  WG problems - testing


Ameer,

Why are you testing the wg funcitonality?  Do you have a boost leak, or are
you checking simply b/c of the noise you mention above?  Are you not making
full boost?  What is the year/model of the patient? 

Jim