[200q20v] Re: 200q20v digest, Vol 1 #587 - 9 msgs

C1J1Miller at aol.com C1J1Miller at aol.com
Mon Oct 15 20:27:04 EDT 2001

In a message dated 10/15/01 12:02:43 PM Eastern Daylight Time, 
200q20v-request at audifans.com writes:

> From: "TM" <t44tq at mindspring.com>
>  To: "Mark Suttner" <msuttner at columbus.rr.com>, <200q20v at audifans.com>
>  Subject: RE: [200q20v] 200q20v stalls while shifting - Advice?
>  Date: Sun, 14 Oct 2001 12:52:50 -0400
>  Mark,
>  Have you checked the bypass valve? I had a similar problem when
>  I was coasting, put the clutch in as I stopped in everyday driving,
>  and the car would stall occasionally.
>  I replaced the bypass valve with a Bailey valve and no problems
>  ever since. This was with stock boost, no less. With a chipped car,
>  expect to replace the factory Bosch valves annually for best performance.
>  I'm not really trying to push aftermarket valves (this came up in
>  a different thread as well), but I believe that the stouter piston-type
>  valves have greater longevity. I hate fixing stuff multiple times, so
>  that's why I went with the $160 solution rather than the $35 one. Now
>  Bernie is going to roast me for that suggestion. :-)
>  Taka

I've seen some threads on failure of the 0-ring on the pistons, taking out a 
not sure that there is any benefit.  My chipped 20vt is on it's second bypass 
valve in the last 100k miles... using stock bosch.  If you go with a piston 
style, keep the preload very low.

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