[Biturbos4] Unholy smoke

Keman keman at interwolf.net
Thu Jul 28 18:48:31 EDT 2005

What's your oil levels looking like?

Anything odd looking in either it or the coolant?

If it smokes the moment you start it up, it's not the turbo oil seals as
far as the exhaust path goes. That won't smoke till it all gets good and
hot. And boy, will it ever smoke then. An oil soaked cat will put out a
cloud of smoke that is reminiscent of Spy Hunter, and for a good half hour
after you replace the turbo.

Intercoolers make good 'filters' preventing oil from reaching the engine
via that route. At least.. until they fill up with oil. But you'd be a
couple cases into Mobil 1 wondering what was going on before that happens.
If you pull your lower intercooler hoses (just loosen em up and pop them
off a bit), and you get a quart of oil daining out, something is bad. If
you get a teaspoon out of the drivers side. *shrugs* That's normal.

I'd also pull the TBB hose up top and see what the throttle body looks
like. Is it wet, or is it SOAKED?

That it only does it on cold startup is interesting. Could be a valve
guide seal. If it is, it'll blow smoke right after you let off the gas
while driving as the high vacuum sucks oil from the valve covers into the
intake ports.

Any misfire codes? How do the plugs look? PCV system?

Good luck...

- Keman

On Thu, 28 Jul 2005, Chris Newbold wrote:

> As if the recent discussion here about dead lines on the trip computer
> display wasn't bad enough (mine was fine until I read the posts and then the
> next morning I started getting an intermittent dead line)...
> Over the course of the last couple of weeks, my 2001.5 has gone from
> emitting a small amount of grayish smoke on cold start (almost acceptable as
> normal) to belching quite a cloud of blue smoke. More blue smoke accompanies
> any significant prod of the throttle for 1-2 minutes following cold start.
> Sigh. Something's just let go.
> Because of the sudden onset I'm assuming this is a problem with a seal
> somewhere, rather than something like valve guides. Anyone have any
> suggestions? PCV system? Turbos (gasp)?
> I'm covered by the extended Audi-Assured warrantee, but I'm sure they'll
> deny there's really a problem unless I show them exactly what's blown...
> -Chris
> 2001.5 S4 Avant 6spd.

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