[Biturbos4] S4 Biturbo newbie

Stephenson step88 at kc.rr.com
Wed Dec 22 11:43:19 EST 2004

I agree with Wilson.  I ran a turbocharged Toyota Supra on Dino oil for 15
years without any turbo problems.  If I ran it hard, I would keep the revs
low and off the boost for the last mile or two so as to get about 120
seconds at or near idle.  Synthetic should have made it even less of a

2000 S4

-----Original Message-----
From: biturbos4-bounces at audifans.com [mailto:biturbos4-bounces at audifans.com]
On Behalf Of northrup
Sent: Wednesday, December 22, 2004 8:43 AM
To: biturbos4 at audifans.com
Subject: Re: [Biturbos4] S4 Biturbo newbie

there is quite a debate about turbo cooling... essentially what i do is to 
stay off the boost as i near my destination, thus letting the oil and 
coolant do their job of cooling down the engine and turbo parts.  
Following this, and depending on the situation, I may idle for 30-120 
seconds... or not.

For example, my work place allows for a downhill coast before parking 
which lasts about 30 seconds.... so, IMHO, that 30 counts toward my cool 
down period.

wilson '00s4

On Wed, 22 Dec 2004, Paul Jones wrote:

> Outstanding info! But I must admit I'm a tad confused about the "cool it 
> down before shutting the engine off" bit. What are you supposed to do?
> >From: Grant <gfl1 at optonline.net>
> >To: Paul Jones <elsey12 at hotmail.com>
> >CC: biturbos4 at www.audifans.com
> >Subject: Re: [Biturbos4] S4 Biturbo newbie
> >Date: Tue, 21 Dec 2004 19:24:25 -0500
> >
> >Mine's been pretty good.  Very solid car.
> >The turbos are a costly, fragile part however.  For starters, there are 
> >two.  They need to be replaced in pairs, supposedly.  Replacement
> >engine removal, so its costly.  On the other hand, Audi has equipped it
> >longevity. The turbos are water-cooled, and there is an after-run pump to

> >keep H2O circulating after you shut it off.
> >
> >There is no maintenance possible per se, btu precautions that apply to
> >turbo car:
> >
> >1. Easy when its cold
> >2. Cool it down before shutting the engine off
> >3. Use synthetic oil, which resists coking at the higher temperatures
> >exist at the turbo
> >4. Change it frequently, I do it ~5k with Mobil 1
> >
> >Problem with a used one is "what did the previous owner, who didn;t plan
> >keep it long anyway, do?".  frequently, not much.  Audi does NOT pay for 
> >synthetic in 6-cyl turbos, so it got regular oil for the first 50k,
> >the owner carried a bag of mobil 1 to the dealer twice a year (like I
> >  Did he cool it down?  Warm it up?
> >You'll just have to feel out the owner and hope for the best.  Do listen 
> >for excessive whining under load ( a bad sign).
> >
> >Other than that, the timing belt service is a bit costly, and should be 
> >done at (let the debates begin) ~75k.  Figure $900-1500, depending on who

> >does it, with the water pump, thermostat, idler and tensioner all at the 
> >same time.
> >
> >Tie rods fail early, as do some control arms.  Life goes on.
> >
> >Despite all this, the car has been very solid.  Heavy duty throughout.  
> >20mpg "normal", with 25+ on the highway.
> >
> >Oh, yea, tune ups are a bear for the DIY, but do-able. Also, careful of
> >17" wheels with 45-series tires.  They bend.  You can get 16' on for
> >but only a select few 16" will clear the big brakes.
> >
> >Mine now has 73k, no rattles, burns almost no oil, no major repairs save 
> >the tie-rods and a couple control arms.  And once done, it drove *like 
> >new*.
> >
> >Grant
> >
> >On Dec 21, 2004, at 10:21 AM, Paul Jones wrote:
> >
> >>Hi all. I have recently sold my '93 V8 and I am considering buying a '00

> >>S4. Having had no previous experience with turbo Audi's I am in need of 
> >>some basic info. on the cars. What are the major problem spots? What are

> >>the major buyers guidelines? Plus, is there any special maintainence
> >>must be performed on the turbos themselves?
> >>
> >>
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> >
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