On Fri, Oct 3, 2008 at 4:54 PM, JAIME E FORERO <jforero@sbcglobal.net>wrote:

> Hi, my 91 Vanagon's AC has been giving me the fits for a few years now.
>  Every spring I have to get it loaded with freon.  This year I had my
> mechanic take the evaporator down, he changed the expansion valve, put it
>  rebuilt compressor and fixed a very small leak in the system. The charge is
> again low and I don't know what to do because we have checked all joints and
> there is no evidence of a leak using a leak detector.  Obviously the freon
> is leaking somewhere.  R12 was the original fluid but since we can't get it
> anymore he uses something called Freeze 12 which works OK but does not cool
> like R12.  Any suggestions, hints, advise???
> Cheers
> Jaime

I went the R134A route and never had any leak issues for several years until
I got rid of the van. The replacement coolants do not work as well as Freon,
but the R134A was not too bad. I did sneal off and got my AC guy to fill my
other AC system with (recycled) Freon. =)

BenT