Your problem could also be rings. And that is what I would be most suspicious of.
With the engine shut down, and oil tending to seek the lowest point, it will seep
downward to the low point in the cylinder barrel, and pooling there, work its way
past the rings to some degree. On initial start up there will be sufficient oil in
the chanber to cause smoking for a few minutes.

Lat year my engine enperienced a piston failure. Early symptoms ---which I didn't
understand at the time -- were some smoke on startup, which would dissapear after
running a few minutes, then smoking heavily when going around a sustained curve at
a continuous rate of speed, such as an on or off ramp on a hiway. The centrifugal
loading tended to through more oil past the rings into the cylinder  that was
beginning to fail, causing heavy white smoke until I was out of the curve. Once on
the straightaway, the smoke disappeared.

I suggest you have a compression test done immediately. Properly done, you should
be able to distinguish between valve problems and ring problems.

Luck,

John Rodgers
'88GL Driver  BTDT

davidb wrote:

> Its definitely oil.
>
> I do have a fear its leaking by the guides after sitting for a while.  I guess
> the list will see how good boston bob's warranty's really are!
>
> davidb
>
> Chris Stann wrote:
>
> > Valve guides?
> >
> > What color is the smoke?
> >
> > ----- Original Message -----
> > From: davidb <davidb@skybest.com>
> > To: <vanagon@GERRY.VANAGON.COM>
> > Sent: Friday, July 21, 2000 6:14 PM
> > Subject: Smokin 1.9
> >
> > > Dear Listees:
> > >
> > > I have a Rebuilt 1.9 with new heads from Boston Bob.  It has 2,000 miles
> > >
> > > on it.  I use it only on weekends, and everytime I start it after it has
> > >
> > > sit for a week I get heavy Oil smoke for about 30-45 seconds.  Now if I
> > > was in NY and fighting the Nile River Virus I wouldn't be concerned, but
> > >
> > > in the pristine mountains of NC, I don't like it a bit.
> > >
> > > Any suggestions??  It has done it since I put the new engine in.
> > >
> > > davidb
> > > '84 yellow suitcase