86 coupe a/c

[Tony Hoffman]

R134A has advanced over the years. It used to be you had to drain the
old oil, evac the system, and then put a vacuum on it. Now, just make
sure there is no R12 in it, and then put your new fittings on it.
Then, fill away. If you do need a new compressor, the rotary "mini
york" is a great substitute, and they don't take near as much HP as
the older piston style compressors.

It never hurts to change the 0-rings, BTW. Especially if the car has
been without working AC for a while. For that matter, the reciever
driers are only about $20, and it's a good time to change that out as
well. But, neither is absolutely necessary. Everything else is
compatible.

Oh, one other thing, you only use 80% as much R134A as what the system
calls for in R12. It expands more.

Tony Hoffman


On Sat, Jun 21, 2008 at 9:36 AM, Mark Donohoe <markdonohoe at sbcglobal.net> wrote:
> I've owned my coupe for about 5 years.  The a/c has never worked.  Might have a leak in the compressor.  There is a nice coating of red grease on it.  Someone may have run some dye through it before I got the car.  Anyway, I saw this 134a retrokit and want to know what you guys think. Directions say all you need to do to switch from R12 to 134 is vacuum the system and change out the ports for the 134 hoses and fill 'er up.  Can that really be so easy?  Seems like I've heard things about incompatible o-rings and hoses and what about the expansion valve and drier?  Any thoughts?
>
> Thanks,
> Mark Donohoe
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