[Vwdiesel] smoking audi diagnosis

[Patrick Dolan]

The colour of the smoke can be in the eye of the beholder.

When you say "white", I think of truly white (and you should be able to smell the sweet aroma of antifreeze).  That is a water leak (head rebuild - head gasket not sealing).

If you really mean "blue" as in light blue, but with a distinctly "oily" smell, I would suspect that a valve guide seal is not sealing (damaged during installation, or left out).

Fuel leaking from an inector would give you over-rich - BLACK smoke with a smell that will burn your eyes (well, mine anyhow).

----- Original Message -----
From: Chris Jude <vegbenz300 at gmail.com>
Date: Monday, May 19, 2008 11:41 pm
Subject: [Vwdiesel] smoking audi diagnosis

> stopped by a mechanics shop I've worked with before and was asking his
> opinion about the Audi (1980 5000S).  It's been blowing bad  white 
> smoke at
> startup since I rebuilt the head about a month ago.
> I noticed on the drive to work today that the car doesn't seem to 
> smoke much
> at all when being driven, and even when i got to work, at idle it 
> didn'tsmoke.  Then at lunch the car took about 10 seconds of 
> cranking to start,
> then blew white/grey smoke for about a block or two.  The same thing
> happened at the end of the day.
> I told him I wanted to do a valve adjustment on it, and the car 
> had a recent
> head rebuild job, and new injectors.  His first thought was that 
> there could
> be oil leaking into a cylinder, an injector could be leaking fuel, 
> or that
> maybe a valve was just too tight.  But he didn't seem to think a valve
> adjustment would solve the problem.
> I'm still going to go for the valve adjustment as soon as I can, 
> but it
> worries me to think that oil might be leaking past the gasket.  Oil
> consumption hasn't seemed to be a problem, but the car can 
> sometimes have an
> acrid smell, even when burning biodiesel.
> I didn't really understand  the leaky injector idea. But, i'm not 
> sure who
> 'remanufactured'  the Bosch injectors i got off eBay.  They looked 
> to be in
> good condition, but I didn't test  them before installing...
> anyone have any opinions?
> 
> chris
> seattle
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