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R-12 Change to R-134a- 94 Z24
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kbridgen3 Gender:female
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PostPosted: Thu Jun 11, 2009 9:38 pm    Post subject: R-12 Change to R-134a- 94 Z24 Reply with quote

I was thinking about switching over to the more updated refrigerant. I have the connections on to do the R-12 swap... would this damage my system? thanks....
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classicz24 Gender:Male
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PostPosted: Thu Jun 11, 2009 9:57 pm    Post subject: Re: R-12 Change to R-134a- 94 Z24 Reply with quote

kbridgen3 wrote:
I was thinking about switching over to the more updated refrigerant. I have the connections on to do the R-12 swap... would this damage my system? thanks....



The R-12 refrigerant is no longer used. There may be some to find somewhere, but it is very hard to come by. Even if it can be found it is very expensive.
You would have to keep the system R-134A.

94's A/C system is R-134A right?
Umm, if it's not you will have to get it retrofitted to accommodate the new stuff --- Which is cheaper than charging with R-12.

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scott0999 Gender:Male
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PostPosted: Thu Jun 11, 2009 10:21 pm    Post subject: Reply with quote

im pretty sure my 94 had to be retrofitted
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PostPosted: Thu Jun 11, 2009 10:53 pm    Post subject: Reply with quote

scott0999 wrote:
im pretty sure my 94 had to be retrofitted


depends on the build date. my 94 cav was R12 and my 94 sunbird is R134 from the factory
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scott0999 Gender:Male
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PostPosted: Thu Jun 11, 2009 11:00 pm    Post subject: Reply with quote

seanski wrote:
scott0999 wrote:
im pretty sure my 94 had to be retrofitted


depends on the build date. my 94 cav was R12 and my 94 sunbird is R134 from the factory


ah, one of those transition years?
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classicz24 Gender:Male
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PostPosted: Thu Jun 11, 2009 11:02 pm    Post subject: Reply with quote

scott0999 wrote:
seanski wrote:
scott0999 wrote:
im pretty sure my 94 had to be retrofitted


depends on the build date. my 94 cav was R12 and my 94 sunbird is R134 from the factory


ah, one of those transition years?



Must be.
That's why I'm not sure what she currently has.

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PostPosted: Fri Jun 12, 2009 12:22 am    Post subject: Reply with quote

scott0999 wrote:
seanski wrote:
scott0999 wrote:
im pretty sure my 94 had to be retrofitted


depends on the build date. my 94 cav was R12 and my 94 sunbird is R134 from the factory


ah, one of those transition years?

My car was built in November of '93 and it has or had R-12 in it. A former co-worker of mine had a HOM '94 VL and hers had R-134A in it from the factory. Hers was built sometime in '94.

First of all, make sure your compressor is good. Another side note, if you see any metal shavings on the orifice tube, most likely the compressor needs replaced and the system flushed.

When converting the system, it's more than just putting the R-134A fittings on. R-12 should be recovered. The system should be evacuated. Replace the accumulator and orifice tube with new ones. Evacuate the system again. Add some dye to help detect leaks in the future. Then you can charge R-134A into the system. Make sure you use pure R-134A, and not the stuff full of oil or sealants. Those are not recommended and could damage the system later on or HVAC service equipment if you have it professionally serviced in the future.

In my '88 S10 I recharged the system with R-12 also at my former employer (a stealership). The system had no leaks, so why not. Most stealerships charge upwards of $100 per lb. of R-12.

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PostPosted: Fri Jun 12, 2009 3:23 am    Post subject: Reply with quote

r12 has smaller connections than the r134a. plus there should be a sticker around the header panel saying how much and what kind of refrigerant.
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kbridgen3 Gender:female
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PostPosted: Fri Jun 12, 2009 2:34 pm    Post subject: Reply with quote

yeah i have R-12 as the original refrigerant. i want to go to R-134a
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kbridgen3 Gender:female
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PostPosted: Fri Jun 12, 2009 2:36 pm    Post subject: Reply with quote

i went to the parts store to get the refrigerant and the oil additive and they couldnt tell me what kind of oil it takes. there were like 6 different kinds of oils. the reason being... its a class project in hvac. i already have the fittings on there.
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kbridgen3 Gender:female
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PostPosted: Fri Jun 12, 2009 2:37 pm    Post subject: Reply with quote

and i dont want to ruin my cold a/c lol. i found some R-12 on ebay.... i would like to just stick with that
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PostPosted: Fri Jun 12, 2009 2:56 pm    Post subject: Reply with quote

kbridgen3 wrote:
i went to the parts store to get the refrigerant and the oil additive and they couldnt tell me what kind of oil it takes. there were like 6 different kinds of oils. the reason being... its a class project in hvac. i already have the fittings on there.


haha they couldnt tell you? i think you need to go to a better parts store!

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kbridgen3 Gender:female
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PostPosted: Fri Jun 12, 2009 4:13 pm    Post subject: Reply with quote

gotta love autozone! LOL!
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PostPosted: Fri Jun 12, 2009 7:57 pm    Post subject: Reply with quote

I converted one of my 92 Cavaliers to R134a. It was pretty easy. I bought a new compressor, orifice tube, accumulator, and new O-rings. I flushed all of the lines, condensor, and evaporater to remove all of the mineral oil that R12 cars use. I also had to put the adapters on the old R12 charging ports. I used PAG 150 oil. It gets pretty cold, about 42*.

My other 92 I left it R12. It gets colder at about 35* I bought the R12 off of ebay for about $64 for four cans. I have a 609 certificate to buy R12 though. I would keep yours R12 if you can get it because it will be colder. Good luck.

Wayne
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PostPosted: Sat Jun 13, 2009 5:39 am    Post subject: Reply with quote

if you waant to convert use the knew fittings, the just go on over the old ones. the oil you are looking for is called peg oil.
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