Did you test your reservoir cap?  If the valve fails it can turn into a
one-way valve - out only...

It should pass air both ways when you suck/blow.  =)

On Tue, Aug 25, 2009 at 10:00 AM, miguel pacheco <mundopacheco@gmail.com>wrote:

> We did the 'block test' I think it's called, repeatedly checking for
> exhaust gas in the coolant, but never detected any. But yes,
> definitely air getting in, expanding and blowing out the coolant. Why
> wouldn't the reservoir cap bleed out the air? Is it possible that
> somehow, a leak could somehow be one way. That it would not leak out,
> but under some scenario, angle of vehicle while engine braking, for
> example, it would pull air in.....?
> Miguel
>
>
>
> On Tue, Aug 25, 2009 at 9:27 AM, Matthew Snook<matt@snooksband.com> wrote:
> > Miguel:
> >
> > Your comment about the heater going cold before the engine overheats
> sounds
> > to me like there is air in the system.  That has happened to me before.
>  A
> > leak may be losing coolant, or somehow air is getting into your system.
> >
> > Matt
> >
> >
> > -----Original Message-----
> > From: miguel pacheco
> > Subject: Re: rear heater ETC
> >
> > ...With the heater running, I know it's about to overheat when the
> blowing
> > heat suddenly becomes cold...
> >
> >
>

--
Beverley Anne de Villiers   April 20, 1930 - July 4, 2009

Jake

1984 Vanagon GL
1986 Westy Weekender "Dixie"

Crescent Beach, BC

www.thebassspa.com
www.crescentbeachguitar.com
http://subyjake.googlepages.com/mydixiedarlin%27