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Posted: 5/27/2012 4:21:10 AM EDT
[#1]
It sounds like it might work. Please, whatever you do, DON'T USE COMPRESSED AIR IN ANY HVAC SYSTEM. It adds moisture to the system, moisture is a bad thing for any hvac system. Use nitrogen to flush and pressure check the system. If you don't have a vacuum gauge, let your vacuum pump run for as long as you can. Close your gauges and let it sit for 30-45 minutes to see if the vacuum holds.
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Posted: 5/27/2012 6:17:52 AM EDT
[#2]
R-152 is flammable. I wouldn't use it.
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Posted: 5/27/2012 7:29:55 AM EDT
[#3]
Quoted:
R-152 is flammable. I wouldn't use it. Good lord, something flammable under the hood? How would the world survive? Make sure it is well marked with stickers and such for the mechanics. |
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Posted: 5/27/2012 8:34:57 AM EDT
[#4]
Quoted:
Quoted:
R-152 is flammable. I wouldn't use it. Good lord, something flammable under the hood? How would the world survive? Make sure it is well marked with stickers and such for the mechanics. LOL.....it was mentioned, i think on a bmw forum, about the flammability of r152a and the comment was made about the gas tank. there is a white paper from perdue university about the study of r152a, r134a and r12a being used in refrigerators and the results were somewhat decent, although, when the r152a hits flame, it turns into hydrofluoric acid. |
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Posted: 5/27/2012 8:30:41 PM EDT
[#5]
Try Autofrost. It works great.
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Posted: 5/28/2012 3:19:20 AM EDT
[#6]
I've never had any problems with the R-134A systems. New cars are designed to cool off the interior by X degrees in the hottest test environments (Death Valley / Mojave as an example and they all use R-134A.
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Posted: 5/28/2012 3:51:10 AM EDT
[#7]
I really wouldn't worry about the environment... China and India dump millions of tons of refrigerant into the atmosphere every year, your few ounces isn't going to matter.
134a is proven, lower pressures, and works just fine for medium temp cooling. Why switch? |
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Posted: 5/28/2012 4:41:33 AM EDT
[#8]
as long as your system does not leak inside the vehicle setting anyone inside on fire, you should be ok fixing a problem that does not exist
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Posted: 5/28/2012 5:04:50 AM EDT
[#9]
I wouldn't mess with it, mostly because it's not a standardized refrigerant for automotive use.
Properly converted 134a systems cool just fine. Posted Via AR15.Com Mobile |
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Posted: 5/28/2012 5:10:23 AM EDT
[#10]
Quoted: I wouldn't mess with it, mostly because it's not a standardized refrigerant for automotive use. Properly converted 134a systems cool just fine. Posted Via AR15.Com Mobile Agree. But it would be fun to look for leaks with a small torch if you do switch it over.  |
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Posted: 5/28/2012 5:43:28 AM EDT
[#11]
Quoted: R-152 is flammable. I wouldn't use it. Meh. I use a 50/50 mix of propane/ iso butane (campstove fuel) Works great as a replacement for R12. Cheap too. As far as the flamabillity goes, the bigest problem with auto a/c in a crash - the only way the gas gets out of the system - is the high pressure atomised spray of lubricating oil coming out. And this happens with ALL a/c leaks created by a crash. The oil is the problem, not the refrigerant. |
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Posted: 5/28/2012 7:37:02 AM EDT
[#12]
If for whatever reason you do decide to use an alternative refrigerant, please mark and ID the system as having something other than R134a in it, and please advise anyone who may be working on your A/C what is really in it. The equipment is really expensive and contamination by other refrigerants suck.
Posted Via AR15.Com Mobile |
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Posted: 5/28/2012 10:04:20 AM EDT
[#13]
well, i've decided that i am going to go with either equivalent r12 replacements, if i can find someone local with it, OR, dump the system, tear it down, flush it, new seals and oil and run r134a.
i had a 97 honda civic that was black and was running 134a that got cold, really cold. good tint makes a difference and i suspect that r134a will be just fine in this case. now the question is which oil should i get, the pag 100 or pag 46? |
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Posted: 5/28/2012 1:24:54 PM EDT
[#14]
Quoted:
Quoted:
Quoted:
R-152 is flammable. I wouldn't use it. Good lord, something flammable under the hood? How would the world survive? Make sure it is well marked with stickers and such for the mechanics. LOL.....it was mentioned, i think on a bmw forum, about the flammability of r152a and the comment was made about the gas tank. there is a white paper from perdue university about the study of r152a, r134a and r12a being used in refrigerators and the results were somewhat decent, although, when the r152a hits flame, it turns into hydrofluoric acid. Anything with fluorine will do that when heated up enough. Like R12 or R134a. |
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Posted: 5/28/2012 7:29:21 PM EDT
[#15]
Quoted:
Quoted:
R-152 is flammable. I wouldn't use it. Good lord, something flammable under the hood? How would the world survive? Make sure it is well marked with stickers and such for the mechanics. Not worried about a leak under the hood. What if the evaporator develops a leak? You leave it parked in your garage with the windows up and that gas is collecting inside the passenger compartment. If the mixture is right you could have an explosive situation. |
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Posted: 5/28/2012 7:31:35 PM EDT
[#16]
Quoted:
Quoted:
Quoted:
R-152 is flammable. I wouldn't use it. Good lord, something flammable under the hood? How would the world survive? Make sure it is well marked with stickers and such for the mechanics. Not worried about a leak under the hood. What if the evaporator develops a leak? You leave it parked in your garage with the windows up and that gas is collecting inside the passenger compartment. If the mixture is right you could have an explosive situation. 
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Posted: 5/29/2012 12:29:23 AM EDT
[#17]
Quoted:
Quoted:
Quoted:
Quoted:
R-152 is flammable. I wouldn't use it. Good lord, something flammable under the hood? How would the world survive? Make sure it is well marked with stickers and such for the mechanics. Not worried about a leak under the hood. What if the evaporator develops a leak? You leave it parked in your garage with the windows up and that gas is collecting inside the passenger compartment. If the mixture is right you could have an explosive situation. LOL ok, so i bought a new drier and the r134a retro kit. also got a variable orifice valve. paid cash so that if i need to return this crap, i don't have to wait 3-5 business days for the debit to be credited..... 
anyways, i think i am going to get the stock 1.99 orifice valve, several cans of brake cleaner, a couple cans of ultra duster, new o-rings, and a bottle of ester oil and do the r152a first to see how that works out. if the r152a holds up, then i'll return the vov and r134a kit and save myself even more money. won't know until i try and all i've seen so far, albeit limited, are positive results so far with r152a and very comparable temps to r12. ETA: autoignition of r152a is >850 degrees F. |
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Posted: 5/29/2012 1:13:56 AM EDT
[#18]
Quoted:
I wouldn't mess with it, mostly because it's not a standardized refrigerant for automotive use. Properly converted 134a systems cool just fine. Posted Via AR15.Com Mobile I converted my vehicle to R134A and it worked as well as when it was in new. Recently, the system leaked out. Atm, I'm working on a leak in the system that I believe I have fixed. The system with new o-rings is showing positive vacuum for over 24 hours. Tomorrow I will recharge the system. 
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Posted: 5/29/2012 1:32:40 AM EDT
[#19]
Isnt R12 available till 2020?
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Posted: 5/29/2012 2:08:29 AM EDT
[#20]
Quoted:
Quoted:
I wouldn't mess with it, mostly because it's not a standardized refrigerant for automotive use. Properly converted 134a systems cool just fine. Posted Via AR15.Com Mobile I converted my vehicle to R134A and it worked as well as when it was in new. Recently, the system leaked out. Atm, I'm working on a leak in the system that I believe I have fixed. The system with new o-rings is showing positive vacuum for over 24 hours. Tomorrow I will recharge the system.
i'm going to try the r152a first and see how the temps are in comparison to a factory r134a system. the conversion cost seems worth the cost to try because even if it doesn't work out, i can just pump in r134a without having to do anything other than release the r152a and then pull a vacuum to suck the r134a in. |
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Posted: 5/29/2012 7:05:31 AM EDT
[#21]
Quoted:
Isnt R12 available till 2020? The manufacturing of R12 was banned in the US back in '94. |
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Posted: 5/29/2012 8:31:58 AM EDT
[#22]
Quoted:
Quoted:
Isnt R12 available till 2020? The manufacturing of R12 was banned in the US back in '94. And while there are stockpiles of it, it is becoming more and more rare and hard to come by. Making it about 3 times more expensive then r134a. And r134a just jumped in price again. |
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Posted: 5/29/2012 3:50:47 PM EDT
[#23]
Quoted:
It's still around, lol, pre ban freon
Quoted:
Quoted:
Isnt R12 available till 2020? The manufacturing of R12 was banned in the US back in '94. And while there are stockpiles of it, it is becoming more and more rare and hard to come by. Making it about 3 times more expensive then r134a. And r134a just jumped in price again. |
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Posted: 5/29/2012 9:25:01 PM EDT
[#24]
Propane is a very usable alternative also.
40% better efficiency than 134a. |
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Posted: 5/30/2012 12:32:39 AM EDT
[#25]
well i'll be damned, guess i'll have to buy a case or a few of the "ultra-duster"
http://www.epa.gov/ozone/snap/refrigerants/lists/mvacs.html r152a is actually an approved cfc-12 substitute. |
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