[s-cars] Smoke at startup

[Philip Mische]

If a leakdown test was done there should be no mystery - listening in the
intake, breather, and exhaust (yes, that's a circuitous path) will reveal
where the air is going.  If you do it with the engine cold, and again when
it's warm, you will get more data to think about.  As for the compression
test - fugetaboutit.

P
----- Original Message -----
From: "serge" <serge411 at speakeasy.org>
To: "Aaron" <aaront at cox-internet.com>
Cc: <s-car-list at audifans.com>
Sent: Thursday, March 04, 2004 12:51 AM
Subject: Re: [s-cars] Smoke at startup


> Aaron, its not so easy to describe the smoke, other than it seemed to come
> after high boost as the car set and idled in stop/go traffic. I speculate
> that oil was making its way into the combustion chamber in high boost
> conditions, then burning off during idle. There was no smoke upon cold
> startup, which is usually the case with worn guides or rings. The turbo
came
> off first at the recommendation of my mechanic, as I have no facility to
do
> the work myself (other than one undisclosed location in Connecticut
between
> the hours of 1:00 and 4:00 AM) I had to go w/ his recommendation. Smoke is
> gone, but the strange thing is that the RS2 turbo that came off is quite
> clean (does not appear to be a turbo seal problem). I had a compression
test
> and a leak down test done at the time the turbo came off. The leak down
> showed some leakage in 3 cylinders, and the compression was down in three,
> but only two cylinders in common between the two tests. Hmmm, either
someone
> goofed, or hit the crack pipe that day. The car has always run fine and
> idled smooth, I have done several long trips (1500+ miles) without any
> reliability concerns or changes in MPG, though I did not want the smoking
to
> get worse. Anyway, I would like to do another compression/ leak down test
> myself to confirm or reject some of my crazy theories about build-up on
> valves and/or seats. Will report back if I find anything conclusive.
>
>
> Serge Filanovsky
>
> 95 S6 Avant
>
>
>
> Hey Serge,
> Now you have us curious - why did you take off the RS goodies?
> Just cause a little smoke or more serious reliability concerns?
> Thanks
> Aaron
>
> serge wrote:
> Lee,
>
> My 95 avant started to do a similar thing late summer. I noticed it mostly
> with A/C running at idle (high vacuum). This happened mostly after high
> boost runs (car was full RS2 less cam). I have taken the RS2 goods off the
> car since then, and now no smoke whatsoever. Have you checked compression
or
> done a leak down test?
>
> Serge Filanovsky
>
> 95 S6 NON RS2 Avant
>
>
>
>
> I just noticed that my '95.5 S6 smokes pretty badly just after startup,
when
> the engine is warm. I have not noticed it when the engine is cold.
>
> If I start the car and let it idle it will begin to smoke quite a bit. If
I
> drive off I see no smoke, and then if I come to a stop I see no further
> smoking.
>
> I'd tell you whether it's blue or white smoke, but I'm not sure as I'm
color
> impaired.
>
> Any thoughts on what it could be? Leaky fuel injector? Oil getting past
the
> valve guides or rings while the car is sitting?
>
> Other thoughts?
>
>
> Lee
> '95.5 S6 avant (Bilstein/Eibach/Euros/HID/BIRA S3)
> '96 A6 quattro avant (Euros)
>
>
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