Convert/retrofit to R134a or stay R12?

[Tony Hoffman]

You can read day and night about this conversion on the internet. The long
and short is this:

1. The 134A molecules are smaller, so they will leak just a bit through
your hoses.

2. Change the reciever drier (under the raintray cover on the right side of
your car)

3. The factory condensor is of the "serpentine" type, as opposed to the
parallell setup of the newer cars. 134a does not cool well with serpentine,
so you should change that over to a paralell flow. I am in the middle of
this on my 89 100 right now. The hardest thing to deal with is the lines.

So, unless you are willing to do that, stick with R12 or an R12 substitute.

HTH,
Tony

On Tue, Jun 18, 2013 at 12:38 PM, Kenneth Keith <auditude at cox.net> wrote:

> I have to replace the compressor on my 200q20v.  Have people had good luck
> retrofitting to R134a, or is it better to stick with R12?
>
> I'm in hot Arizona, so a marginal system is not desirable.
>
> I get the impression from initially searching that a retrofit isn't
> totally terrible.