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Old 09-16-2008, 05:44 PM   #1
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Default R12 convert to R134 freon??

sup everyone,

I have a 1990 mazda miata and i was wondering if anyone convert their freon to R134. how? and what do i need to convert it to R134? and where can i get the parts?

thank you
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Old 09-16-2008, 05:50 PM   #2
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Use Freeze 12 in the R12 system. Works much better than R134a, and you don't need to screw with the valves.
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Old 09-16-2008, 05:52 PM   #3
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+1 for Freeze12. Used it in many a car. Works like a champ.
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Old 09-16-2008, 06:51 PM   #4
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I can't tell you where to find the part as I live in the UK, but I got my '93 Miata converted from R12 to R134a about 6 months ago.

The condenser was replaced and adapters have been installed to be compatible with the new gas fittings (so that R134a service equipment can plug into the AC system)

Overall it works quite well, although the temperatures don't go as low as they used to (this may only matter when sitting in traffic, as it gets cooler at speed).
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Old 09-16-2008, 07:09 PM   #5
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when i use freeze 12 i dont have to convert anything
just recharge it like is a regular R12 rite!

thank you
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Old 09-16-2008, 09:49 PM   #6
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Quote:
Originally Posted by masblue View Post
when i use freeze 12 i dont have to convert anything
just recharge it like is a regular R12 rite!

thank you
Yup, freeze 12 is compatible with R12 systems. Just fill and go.

edit - or grow a pair and take the AC system out..

Last edited by kotomile; 09-17-2008 at 12:41 AM.
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Old 09-17-2008, 12:31 AM   #7
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Freeze 12 has worked well for me too, although I have never used it in a Miata.
Whatever you do, dont put R134 in a R12 Miata system. That sucks *****. I have
owned numerous R134 converted Miatas and none of them cool worth a ****!
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Old 09-17-2008, 12:49 AM   #8
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I have Freeze12 running through my a/c system too with no complaints. Its not freezing cold, but its way better than not working at all.
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Old 09-17-2008, 02:05 AM   #9
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thanks for all the reply people!!

it help a lot!
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Old 09-17-2008, 07:19 PM   #10
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im back for another question

we dont have a high pressure relief valve on our AC system rite!!!
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Old 09-17-2008, 08:31 PM   #11
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Quote:
Originally Posted by miatanutz View Post
Freeze 12 has worked well for me too, although I have never used it in a Miata.
Whatever you do, dont put R134 in a R12 Miata system. That sucks *****. I have
owned numerous R134 converted Miatas and none of them cool worth a ****!
R12 works well because pressure isn't really important. Freeze12 is slightly more picky about getting pressure correct. 134a pressure is critical. If converted and pressurized with 134a absolutely properly, then it will blow cold. Not as cold as R12, but pretty close.
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Old 09-17-2008, 09:11 PM   #12
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And then there is always bootlegged R-12 out there if you look hard enough.
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