When Larry A converted his 91, I wonder if he had to
change hoses.  In 93 VW was using barrier hoses,
because 93 EVs used r134.  I just wodered if you could
get away without doing this PITA hose change?  On my
80 Westy, I shudder to think of what would happen if I
tried to take off the old hoses.  Something expensive,
or impossible to replace would undoubtedly break.

Rob

--- Mike Moery <mike.moery@ACSALASKA.NET> wrote:
> Only vehicles that came with R-134a will have low
> permeability line
> sets.  Also, the receiver-drier should be changed
> any time the system is
> opened for any repairs, whether the refrigerant is
> converted or not.
> Hope this helps!
>
>     -Mike Moery
>      Anchorage, AK, where a/c for my van is the last
> thing I need...
>          ---------------
>         ||E[__] [__]|[_]\
>         | =======| -   ||
>  * * * *( o )-------( o )=
>  'Ol Bessie  '82TD Westy
>
>
> -----Original Message-----
> From: Vanagon Mailing List
> [mailto:vanagon@GERRY.VANAGON.COM] On Behalf
> Of Robert Dalton
> Sent: Friday, February 22, 2002 7:09 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Air Conditioner Question
>
> Hi Jeff,
>
> I think the problem with converting an older van is
> the lack of barrier hoses.  I never could get a
> definitive answer from anyone who has tried it on an
> early 80s AC, but I've heard r134 leaks through the
> non barrier hoses in a matter of weeks.  The other
> question is when did VW start using barrier hoses.
> It
> may have been as early as 91, which is why 90s
> vehicles can be more easily converted to r134.
>
> Rob
>
> --- Jeff Strickrott <jstric01@CS.FIU.EDU> wrote:
> > I am new to AC issues and have an old R12 system
> > that I am contemplating changing
> > over to R134. Is it mandatory to change the
> > receiver/dryer because of the new
> > coolant chemical configuration, or does it just
> make
> > the system more efficient.
> > What else would need to be changed?
> >
> > Any good web resources for converting an existing
> > system? I note that Stan Wilder
> > sent a link for Freeze 12
> > (http://www.freeze-12.com/). Reading the
> > advertisement
> > it looks to be a better deal than R134. No idea
> how
> > expensive it is.
> >
> >
> > Regards,
> > --Jeff Strickrott
> > 82 Westfalia
> >
> > Larry Alofs wrote:
> >
> > > developtrust wrote:
> > >  At $180 to service it I'd like
> > > > to fix any leaks to minimize a yearly drop of
> > almost $200.
> > > >
> > > > Any advice? It is 80 degrees in California
> today
> > with our dry Santa Ana
> > > > winds and also summer is coming.
> > > >
> > > > Has anyone solved this AC issue more
> permanently
> > than replacing freone every
> > > > year?
> > > >
> > > Last spring I converted my 91 to R134a.  The PO
> > had said that the R12
> > > had leaked out soon after he had it recharged.
> I
> > replaced the
> > > reciever-drier , emptied the old oil out of the
> > compressor, replaced it
> > > with ester oil.  I put in new O-rings at those
> > connections.  I suspect
> > > that the ones at the compressor were leaking;
> they
> > were quite flat and
> > > hard.  I pumped the system down for a few hours
> > with a vacuum pump and
> > > then recharged it.  I invested about $75 in a
> > service gauge set.
> > >   I am quite happy with the performance so far,
> > but it has been less
> > > than a year.
> > >
> > > Larry A.
>
>
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