Valve seal question

[Feelstranger]

Thanks Bernie.
I just would like some feedback about the longevity of the exhaust guides. 
How many have opened heads and found guides that need to be replaced and at 
what mileage?
How long will a new seal last if the guide itself is out of spec?
Also, the smoke puffs at shifts are indicative of valve seals, not turbo, 
correct?
Thanks


----- Original Message ----- 
From: "Bernie Benz" <b.benz at charter.net>
To: "Feelstranger" <feelstranger at hotmail.com>
Cc: "200q20V mailing list" <200q20v at audifans.com>
Sent: Tuesday, November 29, 2005 2:29 PM
Subject: Re: Valve seal question


> Yes, valve stem seals can be replaced without removing the head, and valve
> stem clearance in the guide can be measured at the same time.
>
> Bernie
>
>> From: "Feelstranger" <feelstranger at hotmail.com>
>>
>> Hello all,
>> I have not been subscribed to this list for a while (year?), so I hope 
>> this
>> is not an anoying question.  I looked at the archives and tried to search
>> them to no avail.  I am getting significant oil consumption.   I have 
>> seen
>> the small puffs of smoke at shifts while tailing my SO.  I gather this is
>> typical of valve seals, correct?
>> I was going to have a shop do them, but they said it was a waste and that
>> the exhaust guides should be done too.  Car is at 163K.  So, is this 
>> likley
>> true?  Can valve guide wear be tested without head removal?
>> How hard is a valve seal job only on a 20V?  I assume it can be done with
>> head in car?
>>
>> Thanks!
>> Nat
>