[200q20v] Is it my turbo?

[Rich Andrews]

Brett,


As far as Audi turbos go, that is horse hockey.  I have never heard of 
anyone having to rebuild a turbo on an Audi unless they abuse the crap 
out of them.  Now if you have a GM turbo, they die after about 65k 
miles.   I have 2 Audi 200's in my driveway, one with 185,000 and the 
other with 205,000 and both turbos are fine.

rich andrews sr.


Brett Dikeman wrote:

> The Bosch TBV was updated fairly long ago because in Saab applications,
> the valve would "hoot."
> 
> To fix the problem, they added a metal piece that drastically lowers the
> resonant frequency of the valve mechanism.  It's visible as a brass ring
> if you look inside the valve.  
> 
> However, I'm not sure why it would happen on acceleration; unless it
> failed in some new and exciting way, this fact rules out it being the
> cause of the noise.
> 
> I remember reading somewhere that automotive turbos are(or were) designed
> to be overhauled every 120,000 miles or so.  Some listers have strongly
> recommended simply buying a reman'd unit, and returning the old one as a
> core...rather than getting slammed by an unscrupulous overhaul shop...
> 
> Brett
> 
> On Fri, 17 Nov 2000 WARATAP at aol.com wrote:
> 
> 
>> Lately (for the last month or so) under light acceleration as the car vacuum 
>> boost gauge makes the transition from vacuum to boost, I can often hear a 
>> sound similar to what one makes when blowing over the top of a soda or 
>> (better yet) beer bottle.   I haven't checked the positive pressure hose yet, 
>> but my IC does have a copious amount of oil at the bottom of the endcaps.
>> 
>> Anyone else experience this?  I'm still getting 20+ lbs of boost, but maybe 
>> the bearing is going?
>> 
>> I'll be replacing the turbo afterrun pump next week (leaking).
>> 
>> -Ingo
>> '91 200 with a few mods...130k
>> http://hometown.aol.com/quattringo/index.html
>> 
> 
> 
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