Conversion to R-123A on My 1991 20V Turbo

[Project Pat]

This is from a "Jim Sims" on an AC forum.  Hopefully I won't get prosecuted
for cut/pasting his comments:

"Barrrier hose has an additional layer of material (nylon like compounds are
best) to reduce the permeation of the refrigerant and is recommended for the
newer R-134a refrigerant. If one's A/C hoses have been in use and are not
leaking and one converts to R-134a due to a compressor failure or upgrade it
is not necessary to replace the hoses. Apparently the mineral oil used in
the R-12 systems has internally coated the hoses and stays in place since it
is not miscible with R-134a refrigerant. This oil coating keeps the
permeation of the R-134a within reasonable bounds. However, if a hose goes
bad one should replace it with one made with the new barrier hose even if
one is staying with R-12."


-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of Paul Caouette
Sent: Monday, July 01, 2013 2:15 PM
To: Jeremiah Curry
Cc: quattro
Subject: Re: Conversion to R-123A on My 1991 20V Turbo

Yes! 134 is what I meant.

Did anyone replace the hoses? I'm told that the 134(A) coolant molecules
are smaller and leak through the old type rubber hoses....




On Mon, Jul 1, 2013 at 11:35 AM, Jeremiah Curry
<jeremiah at curryclan.net>wrote:

>  I did it with a kit from AutoZone that included the cooland mixed with
> some special oil.  Cheap and it worked....at least for the year or so I
had
> my 200 20v after that.
>  ------------------------------
> From: Paul Caouette <paxnobis at gmail.com>
> Sent: 7/1/2013 11:16 AM
>
> To: quattro <quattro at audifans.com>
> Subject: Conversion to R-123A on My 1991 20V Turbo
>
> Two mid summer drives across mid-America has convinced me I need to get
the
> A/C back in shape. Considering a conversion. Any BTDT comments (or "Don't
> Go There" warnings) appreciated.
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>



-- 
Paul Caouette
sv Wild Iris (V40-133)
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