Ron,
So, 134a is the new A/C gas. I've just asked Ed what "134" is, and you've
told me. I note what you say about Helium, and will talk to the GM people
about the idea. The dye has been used by the earlier small local garage:
no leaks. The small local garage also used a blue light with the operator
wearing special glasses (?): no leaks.
What does the paperclip do in the (intermittent) relief valve on the
condenser?
Michael
----- Original Message -----
From: "Ron Soave" <soavero@yahoo.com>
To: "WJHS1960" <WJHS1960@comcast.net>; "Spridgets"
<spridgets@autox.team.net>
Sent: Sunday, July 01, 2007 11:39 PM
Subject: Re: [Spridgets] Cadillac Eldorado v. AN5
> --- WJHS1960 <WJHS1960@comcast.net> wrote:
>> Bet it does NOT like the 134, Michael.
>
> Back-in-the-day, I did a lot of work on R-134a
> replacement after the 1989 Montreal Protocol came out,
> before 134a was commercially available. 134a was not
> compatible with the compressor shaft seals that were
> used for R-12. I was always amazed that the
> "conversion kits" often just consisted of schrader
> valve adapters! If you've got a really good shop,
> another trick we used to use on aircraft for finding
> particularly sneaky leaks is to fill the system with
> Helium and use a Helium sniffer to find them. Helium
> is easier to sniff than refrigerant, although you may
> get some leaks with He that you won't have with
> refrigerant. The dye stuff is OK, but not always easy
> to see on a car.
>
> Check for a faulty (intermittent) relief valve on the
> condenser as well. If it's not really low on charge
> and the evaporator isn't icing, find the switch and
> stick a paperclip in it!
>
> G'luck,
> Ron
>
>
>
>
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