[Biturbos4] S4 Biturbo newbie
northrup at crazybug.com
Wed Dec 22 09:50:51 EST 2004
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
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 requires
> >engine removal, so its costly. On the other hand, Audi has equipped it for
> >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 ANY
> >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 that
> >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 to
> >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, unless
> >the owner carried a bag of mobil 1 to the dealer twice a year (like I did).
> > 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 the
> >17" wheels with 45-series tires. They bend. You can get 16' on for snows,
> >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
> >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 that
> >>must be performed on the turbos themselves?
> >>Biturbos4 mailing list
> >>Biturbos4 at www.audifans.com
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