Posted: 2/21/2024 6:03:52 PM EDT
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Looks like I am good with the oil being backwards compatable so the compressor won't grenade so I should be able to Run 134-A in a 1234yf system correct? I supposed just to fill the system by weight and not pressure? |
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Quoted: I've never seen it done yet but understand why with the cost of 1234 So what I have gathered is the PAG oil for 134A doesn't play well with R1234-YF....but R1234-YF oil is fine for R-134A...apparantly the 1234 will break down the 134A oil Also...I have heard that you don't want to mix R1234 and R134 together, as the R1234-YF will breakdown the 134A...not sure how accurate that is, but the point is moot for me as I don't have any refrigerant in the lines. |
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Quoted: Just got a call today from one of the parts houses selling 1234 for $458 per bottle. Lowest I’ve seen so far.  Quoted: Quoted: I've never seen it done yet but understand why with the cost of 1234 Just got a call today from one of the parts houses selling 1234 for $458 per bottle. Lowest I’ve seen so far. That's retarded expensive. The EPA likes that shit because it breaks down in 2 weeks as opposed to 10 years for R134A |
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Quoted: That's retarded expensive. The EPA likes that shit because it breaks down in 2 weeks as opposed to 10 years for R134A Quoted: Quoted: Quoted: I've never seen it done yet but understand why with the cost of 1234 Just got a call today from one of the parts houses selling 1234 for $458 per bottle. Lowest I’ve seen so far. That's retarded expensive. The EPA likes that shit because it breaks down in 2 weeks as opposed to 10 years for R134A And that’s a 10 pound bottle, not 30. |
| I have done it and it works just fine, I figured it out after reading a Mercedes recall due to 1234yf being flammable and accidents causing fires. They vacuum the system, changed the fill ports/lines, and recharged it to stock weight with 134a. I dont remember what oil i used when I converted a wrecked Kia but 5 years later it still has cold AC. Fill by weight in all cars, 1234 or not, and it always works. I've run across a few cars recently where proper weight yields lower pressures than normal but ICE COLD air. |
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Quoted: I have done it and it works just fine, I figured it out after reading a Mercedes recall due to 1234yf being flammable and accidents causing fires. They vacuum the system, changed the fill ports/lines, and recharged it to stock weight with 134a. I dont remember what oil i used when I converted a wrecked Kia but 5 years later it still has cold AC. Fill by weight in all cars, 1234 or not, and it always works. I've run across a few cars recently where proper weight yields lower pressures than normal but ICE COLD air. that's the key from what I have read...you can't mix the two...gotta do a whole evac. |
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Quoted: 1234yf runs at different pressure and the expansion valve as well as the compressor are different. I’m not saying it’s impossible, but I can’t make it work. 12, 134a and 1234 all run within a couple pisseye, with 12 running a lower pressure by 10-15 in hot condenser. Expansion valve should not matter and a compressor is built to pump a gas. |
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Quoted: Came to say this I have never tried it myself Quoted: Quoted: 1234yf runs at different pressure and the expansion valve as well as the compressor are different. I’m not saying it’s impossible, but I can’t make it work. Came to say this I have never tried it myself the pressures overlap in a automobile, it may be different in residential/commercial hvac. It's definitely gonna work in Automotive. |
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Was going to chime in about the fixed orifice valve sizing might be an issue with icing. 1234 was juuuusstttt starting to come in on Lexus cars when I got out. My wife's Bronco has 1234 in it. @midcap, do you know if the coupler fittings are the same between 134 and 1234? |
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Quoted: 1234yf is a propane base. Fucking lol.... Propane is... Propane R12 exposed to flame turned into Mustard Gas R134 developed and used successfully as a replacement for R12 and "more environmentally friendly". R1234yf being propane based because tree hugger feelings is fucking retarded.... Clown world. |
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Quoted: Never mix refrigerant. Quoted: Quoted: that's the key from what I have read...you can't mix the two...gotta do a whole evac. Never mix refrigerant. This! Do not mix Been working at dealers long enough to have seen some shit and the cost of parts for the 1234 shit is stupid 1400.00 for a 10lb cylinder 50.00 dollars for O-rings on the lines And the lines themselves 300 to 500.00 each Do not skimp |
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Quoted: Was going to chime in about the fixed orifice valve sizing might be an issue with icing. 1234 was juuuusstttt starting to come in on Lexus cars when I got out. My wife's Bronco has 1234 in it. @midcap, do you know if the coupler fittings are the same between 134 and 1234? Couplers are not the same, but they sell adapters. |
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Quoted: I've done it once and didn't have an issue. I don't go off weight, just charge through the low side and watch the gauge, try to get it as close to 33psi as you can. Pressures are no longer an accurate measurement many newer systems have lower pressures but Ice Cold A/C. Always go by factory weight and you'll never be wrong. |
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Quoted: Pressures are no longer an accurate measurement many newer systems have lower pressures but Ice Cold A/C. Always go by factory weight and you'll never be wrong. We don't have an A/C machine or scale but don't do too many 1234 systems unless pulling the cab. Most of our A/C work is 134. |
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Quoted: We don't have an A/C machine or scale but don't do too many 1234 systems unless pulling the cab. Most of our A/C work is 134. Refrigerant scales are cheap if your using 30lb cylinders. If you're using cans just do the math to figure out how many cans you need. |
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Quoted: Looks like I am good with the oil being backwards compatable so the compressor won't grenade so I should be able to Run 134-A in a 1234yf system correct? I supposed just to fill the system by weight and not pressure? We replaced them straight across for a recall years ago. yf came out with the 231 chassis SL, we removed it and put 134 back in a few months into production. Never had a problem. Need two machines though, they can’t mix. We have variable displacement compressors, pressure does whatever it wants. Fill to spec. Done. |
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Quoted: You'll notice they said not to vacuum the oil out so clearly 1234yf oil works for r134. Quoted: Quoted: hells yeah! You'll notice they said not to vacuum the oil out so clearly 1234yf oil works for r134. yeah I did see that...what I read is that 1234yf oil is fine with r134 but not the other way around. If the EPA actually gave a fuck they would figure out how to make R-1234-yf cheap like R-134a |
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Quoted: Was going to chime in about the fixed orifice valve sizing might be an issue with icing. 1234 was juuuusstttt starting to come in on Lexus cars when I got out. My wife's Bronco has 1234 in it. @midcap, do you know if the coupler fittings are the same between 134 and 1234? couplers are different |
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Quoted: This! Do not mix Been working at dealers long enough to have seen some shit and the cost of parts for the 1234 shit is stupid 1400.00 for a 10lb cylinder 50.00 dollars for O-rings on the lines And the lines themselves 300 to 500.00 each Do not skimp Quoted: Quoted: Quoted: that's the key from what I have read...you can't mix the two...gotta do a whole evac. Never mix refrigerant. This! Do not mix Been working at dealers long enough to have seen some shit and the cost of parts for the 1234 shit is stupid 1400.00 for a 10lb cylinder 50.00 dollars for O-rings on the lines And the lines themselves 300 to 500.00 each Do not skimp I'm not skimping...I am a shitbox monger |
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Quoted: so down the road he can pooch someone else's pricy as fuck R1234yf tank. plus $1000 fine if they track it back to you and I think it fucks your epa certs. Quoted: Quoted: But why? I hope your not doing this for a customer. so down the road he can pooch someone else's pricy as fuck R1234yf tank. plus $1000 fine if they track it back to you and I think it fucks your epa certs. I do not own a repair shop
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Quoted: https://www.ar15.com/media/mediaFiles/61196/1000016009_jpg-3137715.JPG Don't buy a 10 pounder just to do one car. I'd need like 4 8oz cans |
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Quoted: yeah I did see that...what I read is that 1234yf oil is fine with r134 but not the other way around. If the EPA actually gave a fuck they would figure out how to make R-1234-yf cheap like R-134a We had get a whole second set of AC machines for cars with electric compressors, “the oil is different”. Order the $600 bottle of special electric oil, the part number changes up to the same oil we have on the shelf. Probably $15k down the drain
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Quoted: We had get a whole second set of AC machines for cars with electric compressors, “the oil is different”. Order the $600 bottle of special electric oil, the part number changes up to the same oil we have on the shelf. Probably $15k down the drain Quoted: Quoted: yeah I did see that...what I read is that 1234yf oil is fine with r134 but not the other way around. If the EPA actually gave a fuck they would figure out how to make R-1234-yf cheap like R-134a We had get a whole second set of AC machines for cars with electric compressors, “the oil is different”. Order the $600 bottle of special electric oil, the part number changes up to the same oil we have on the shelf. Probably $15k down the drain lol damn |
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Quoted: I do not own a repair shop at least CLEARLY mark the system has been contaminated with R134A on the caps, and bottom of hood. cause if some poor tech sucks it down without testing it first you know his ass is grass for the 30lb can and whatever else needs to happen to remedy the problem with a contaminated machine. or worse case scenario it ends up chemical soup in like 30 customers cars. |
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I like that. Fuck the EPA. |