GM boo boos

[Shannen Durphey]

Means it's not an early unit.  Vacuum fitting allows engine to draw
air through dizzy to remove moisture.  There was some problem with the
first ones (with vacuum fitting) collapsing because of vacuum.  Might
have some TSB's around.
Shannen

Bruce Plecan wrote:
> 
> -----Original Message-----
> From: Shannen Durphey <shannen at grolen.com>
> To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
> Date: Friday, February 19, 1999 10:24 AM
> Subject: Re: GM boo boos
> 
> Vac fitting, yep.  Why?.
> Bruce
> 
> >> Any one running a LT1?, or LT1 Dist?.
> >> Guess what, you have almost a 1/8" air gap, in the
> >> distributor.  .130" as I measure it.......
> >> Worlds neatest optical sensor, and what must be a
> >> laser cut disc, and then that.  Someone might think of
> >> curing that.
> >> Bruce
> >Seems some of those units were changing size with temperature, in the
> >early days.  Also had lotsa troubles with moisture and acid buildup in
> >the early versions.  Does yours have anything that looks like a vacuum
> >fitting on it?
> >Shannen
> >