On Wed, Apr 21, 2010 at 11:37 AM, Jorge Garcia <fortee9er@yahoo.com> wrote:
> As we say in Texas "I am fixing to do" some car a/c work and need advice.
> One of the cars involved is a 1987 Volvo 740 with the original R12 system. I
> have never touched the a/c system on this car all the 8 years that I've
> owned it. It was low on freon when I purchased it and I rolled down the
> windows and drove that way for a couple of years. Then it went into storage
> for five years. I have now revived it gotten it to pass the state emissions
> and safety inspection but I want air conditioning.
> How do I test for leaks since the system is virtually empty? I have never
> done any a/c work on my cars but I do have a/c gauges for r12 and r134 and a
> few other a/c tools are available to me from friends.
> Any advice/comments on this project will be greatly appreciated.
>
Expect to spend a bunch....
First step is to evacuate (and recover, please!) all the existing
refridgerent. then you pull a vacuum, and see if it decays. If it doesn't,
then you don't have a leak (or you have a leak that only exists under
pressure). If it does leak, and hte leak is fairly small, charge the
system, icnluding a dye. Then find the leak, evacuate the system, repair
the leak, check that it holds vacuum, charge, test for leaks.
But really, I'd take the car to a shop, have them find the leaks, and fix
them myself. (If I decided I wanted to spend the money. You'll likely need
a compressor and condensor.)
--
David Scheidt
dmscheidt@gmail.com
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