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Old 06-25-2003, 09:22 AM
ffej ffej is offline
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So I'm driving and one of my AC hoses..the one closest to the manifold blows....smoke and stink all over. So I'm thinking of either retrofitting to 134a or going to Freeze 12. It's just Freeze 12..to my knowledge is flammable and a leak or hose blow out could be pretty hazzardous . I've checked the archives and just couldn't find anything addressing this concern. Any help would be cool!
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Old 06-25-2003, 11:49 AM
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gwinn gwinn is offline
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Enough heat and a fire extinguisher is flammable. To my knowledge Freeze 12 is no more flammable than any other retrofit choice. Try to keep the engine temps below 300*F.

Edit: It does have a flash point, where 134a doesn't. I s'pose you just gotta' make sure it doesn't leak.

http://www.freeze12.com/pdf/6030.pdf

http://www.labconco.com/msds/freeze/KLEARef.pdf

[ June 25, 2003, 06:00 PM: Message edited by: gwinn ]
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Old 06-26-2003, 04:56 AM
ffej ffej is offline
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Thanks for the info...The engine can get pretty warm around those hoses..I think I'll go with the 134...I don't like the idea of my girlfirend driving around just waiting for a leak..and a fire. If that would have been freeze 12 in my system when that hose broke..It would have been..not good

[ June 26, 2003, 10:58 AM: Message edited by: ffej ]
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Old 06-26-2003, 05:38 AM
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The worst thing that could happen from something like this, is so nasty you don't even really want to think about it. If you take freon and get it really really warm, you can easily create something called Phosgene (CoCl2). This stuff was used by the Nazi's in WWII to gas people. Your lungs will collapse, you'll get several clots in the blood vessels coming from your lungs, and you will die a painful and quick death. So please, for the love of everybody, make sure those hoses are in good shape, and that if they do rupture, that you stay away from under the hood, or right next to the truck until everything has cleared away.
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Old 06-26-2003, 05:39 AM
Aaron Aaron is offline
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Just go with 134a. One nice thing about 134a is that if you need a charge while you are away from home, every autoparts store sells it. Broken A/C could ruin a vacation.
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Old 06-26-2003, 06:20 AM
Bob Barry Bob Barry is offline
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I'll third the 134a recommendation. I had my GW converted two years ago, and just today (90ºF+) I had to turn it on low to keep from freezing my kneecaps.
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Old 06-26-2003, 06:24 AM
ffej ffej is offline
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I'll tell you..when that hose broke (right next to the manifold) I thought I was screwed...Smoke..stink..I thought she was on fire and then the smoke cleared and I looked puzzeled at my friend..got in and fired it up. I realized I blew the A/C Hose a day later..I just figured it was another one of those things that our rigs do from time to time..Who makes a good conversion kit that is of high quality..or are they all pretty much the same?

Thanks
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Old 06-26-2003, 11:35 AM
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You drive a gasoline powered SUV and you are worried about Freeze 12 being flammable? I guarantee, it's not nearly as flammable as gasoline!
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Old 06-26-2003, 05:19 PM
J-Dime J-Dime is offline
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I use the 2-55 system in the J-10, 2 windows rolled down, and 55mph. Seems to work ok most of the time, sucks in traffic though. [img]smile.gif[/img]
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Old 06-27-2003, 01:52 AM
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Quote:
If you take freon and get it really really warm, you can easily create something called Phosgene (CoCl2).
When I was a young idiot in refrigeration school, I learned this scientific fact the hard way. My project was to sweat a valve off the liquid line inside a walk-in cooler and sweat on a new one. I failed to remove the refrigerant before torching the valve. When she blew there was so much R12 and Phosgene gas in the air I couldn't find my way out of the cooler right away. I got some nasty burns on my eyelids, nasal passages, lips and of course lung damage. Man that sucked!

I'm not sure that Phosgene can be produced with the new generation refrigerants. R12 is a CFC which contains a chlorine atom. The new generation are HFC's and don't have chlorine in their makeup.
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Old 06-28-2003, 08:09 AM
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Freon and similar chemical compounds (Halon, for example) must get very hot to produce Phosgene. Warm ambient temps won't do it. Fire will. Don't know if the HFC's produce any bad byproducts.
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