The factory R12 A/C system on my 1988 Mazda B2200 has had a slow leak
for the last 10 years. Normally adding one small can of R12 in the
Spring would get me through until the next year. Last year the small
leak apparently became a major one: the sight glass looks like all the
freon is gone and the A/C doesn't cool at all. The compressor kicks
Given the high cost and scarcity of R12 (I'm down to my last 3 small
cans) I'm wondering if I'd be better off having a professional A/C
shop convert the system over to R134 after they locate and fix the
source of the leak. An article which came out in Family Handyman or
some such do-it-yourself magazine back in the 90s listed the B2200 as
one of the more expensive models to convert, because major components
have to be replaced along with the O-rings. However, people lately
have told me it's not as big a deal as it was once made out to be, at
least for most makes/models, and on most cars the R12 components will
work with R134.
Can any of you refrig techs or fellow B2200 owners give me the
straight story, and tell me approximately how much the conversion job
would cost assuming the leak is just a bad O-ring or seal?
On Fri, 21 Sep 2007 14:03:32 -0700, firstname.lastname@example.org wrote:
Fix the leak and leave it charged with R12. It will cool better and
be less prone to future leakage. Total cost will probably be
considerably less than converting it. R12 is still available. I have
it and could easily buy more if I wanted.
The issue is that it's usually _cheaper_ to replace major components.
For example, you can take the compressor apart, replace the various
rubber seals in it, clean the oil out, and put it back together, and
it'll only cost you a few dollars in parts and a whole lot of labour.
If your labour is free, by all means do this. But if you're paying
for labour it might just be cheaper to drop in a new compressor.
R12 was frightfully expensive for a few years after it got taken off
the market, but prices stabilized and then have dropped considerably.
It's still more expensive than R134A, but it's not anywhere near as
expensive as it used to be. So there isn't as big a reason to change
things over as there once was.
"C'est un Nagra. C'est suisse, et tres, tres precis."
On Fri, 21 Sep 2007 19:24:31 -0700, email@example.com wrote:
My shop does not do conversions. I bought plenty of R12 when I saw
the handwriting on the wall. I am not that impressed with the cooling
performance of most conversions I see, nor their ability to contain
Drier is probably not compatible.
"O" rings, hoses, expansion valve will all get by but they are NOT
optimal for HC134. Hence less cooling, more chance of leaks.
Wholesale suppliers still offer to sell me R12.
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