Guys, I messed up , I let all the pressure out fro
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Originally Posted By: Gabe
You will need to replace the orifice tube as well.
A replacement R12 refrigerant is available. I would order that long before I considered any conversion.
+1 Glad I bought 30 lbs. of it while I still could. R12 is golden compared to swinging an R12 system over to a 134a system. It might work OK, but it will never be as good.
You will need to replace the orifice tube as well.
A replacement R12 refrigerant is available. I would order that long before I considered any conversion.
+1 Glad I bought 30 lbs. of it while I still could. R12 is golden compared to swinging an R12 system over to a 134a system. It might work OK, but it will never be as good.
Originally Posted By: JHZR2
Originally Posted By: RiceCake
R-134A is a replacement for R-12, you can just recharge with 134.
NO, NO, NO.
OP, find out if it was an R12 system or R134a. R12 is still available, and shops install it. The performance with R12 will be superior to R134a and easier on the old components in the system due to lower operating pressures. So find a good shop that still works R12, the prices have come way down on the refrigerant and youll be happier.
If the system is open, might as well consider cleaning or replacing the orifice or expansion valve, and sapping as many o rings as you can.
You will absolutely need to replace the receiver dryer, youll need to add some oil, and pull a solid vacuum on it, and ensure that it holds for 30minutes or more. If not, find the leaks with a mixture of nitrogen and R22 from a sniffer, then fix the leaks. I doubt you have any though, and you know what youve opened up..
After pulling the vacuum and ensuring that the system is tight, then add R12 to the correct mass and go on your way.
Good luck!
100% TRUTH! Beings its a 93 I am pretty sure it's R12. My Corvette is a 94 and that was one of the first cars for R134a.
Originally Posted By: RiceCake
R-134A is a replacement for R-12, you can just recharge with 134.
NO, NO, NO.
OP, find out if it was an R12 system or R134a. R12 is still available, and shops install it. The performance with R12 will be superior to R134a and easier on the old components in the system due to lower operating pressures. So find a good shop that still works R12, the prices have come way down on the refrigerant and youll be happier.
If the system is open, might as well consider cleaning or replacing the orifice or expansion valve, and sapping as many o rings as you can.
You will absolutely need to replace the receiver dryer, youll need to add some oil, and pull a solid vacuum on it, and ensure that it holds for 30minutes or more. If not, find the leaks with a mixture of nitrogen and R22 from a sniffer, then fix the leaks. I doubt you have any though, and you know what youve opened up..
After pulling the vacuum and ensuring that the system is tight, then add R12 to the correct mass and go on your way.
Good luck!
100% TRUTH! Beings its a 93 I am pretty sure it's R12. My Corvette is a 94 and that was one of the first cars for R134a.
If you capped it back up as soon as the charge was lost, there won't be a problem with moisture... I'd just toss one of the compatible R-12 replacements in it and keep on going(actually I'd go get the R-12 jug that a friend has and do it myself but that's another story)...
'93 was the last year for R-12, but I believe a few mfgr switched prior, should be a sticker that will tell you... Size of the charge fittings are different so it's easy to tell by just looking...
'93 was the last year for R-12, but I believe a few mfgr switched prior, should be a sticker that will tell you... Size of the charge fittings are different so it's easy to tell by just looking...
of course you know we cant let near any resistors least you release the smoke. LOL
Given the age of the car, I would think that at one time, something had already failed, and it got r-134a in the process.
Anyway, you will know if someone retrofitted it to R-134a because the high side and low side service ports are completely different from each other, whereas R12 had identical high side and low side service ports.
Another thing could have happened. At one time the car might have been using something that is not R12 or R134a.
Where I live, many guys use a product called "Freeze-12" as an alternative refrigerant.
Anyway, you will know if someone retrofitted it to R-134a because the high side and low side service ports are completely different from each other, whereas R12 had identical high side and low side service ports.
Another thing could have happened. At one time the car might have been using something that is not R12 or R134a.
Where I live, many guys use a product called "Freeze-12" as an alternative refrigerant.
Originally Posted By: artificialist
Given the age of the car, I would think that at one time, something had already failed, and it got r-134a in the process.
It's a freakin' Corolla. At least around here most of these cars still have the original AC working regardless of age without an issue. Of those that broke it usually is the result of a failed relay, failed fan motor, or collision damage. Well, there's also the problems caused by low quality repairs of imaginary AC problems because people can't tell the difference between a burnt relay and a non-functioning compressor clutch.
Originally Posted By: artificialist
Where I live, many guys use a product called "Freeze-12" as an alternative refrigerant.
This stuff works just fine in my refrigerator.
Given the age of the car, I would think that at one time, something had already failed, and it got r-134a in the process.
It's a freakin' Corolla. At least around here most of these cars still have the original AC working regardless of age without an issue. Of those that broke it usually is the result of a failed relay, failed fan motor, or collision damage. Well, there's also the problems caused by low quality repairs of imaginary AC problems because people can't tell the difference between a burnt relay and a non-functioning compressor clutch.
Originally Posted By: artificialist
Where I live, many guys use a product called "Freeze-12" as an alternative refrigerant.
This stuff works just fine in my refrigerator.
I converted my Accord to R134a about a year and a half ago and I still get 42 degrees out of the vents. I can now use the same service equipment as the rest of my vehicles, and easily buy more (cheap) refrigerant at any parts store. Conversion was totally worth it.
Why not just put in what's supposed to be in there?
http://www.epa.gov/ozone/snap/refrigerants/hc-12a.html
It has been illegal since July 13, 1995 to replace CFC-12 with the HC-12a® formulation that was submitted for SNAP review in any refrigeration or A/C application other than industrial process refrigeration. The same prohibition for OZ-12® took effect on April 18, 1994. Because DURACOOL 12a® has the same chemical composition as the HC-12a® formulation that was submitted for SNAP review (i.e., Hydrocarbon Blend B), DURACOOL 12a® is also subject to the same restrictions.
HC-12a®, as reformulated to meet DOT requirements, is not the same as Hydrocarbon Blend B and has not been submitted for SNAP review. OZ Technology is therefore prohibited from marketing this blend as a substitute for any ozone-depleting substance. In addition, any use of this blend as a substitute for CFC-12 or any other ozone-depleting chemical, in industrial process refrigeration or any other refrigeration or A/C end use, is prohibited under the Clean Air Act.
In addition to the prohibition on use described above, and the federal law banning the venting of all refrigerants, there are also state and local statutes and regulations that relate to certain uses of hydrocarbons. As of the printing date of this fact sheet, EPA is aware that the following states prohibit the use of flammable refrigerants in automobile air conditioners: Arkansas, Arizona, Connecticut, Florida, Idaho, Iowa, Indiana, Kansas, Louisiana, Maryland, Nebraska, North Dakota, Oklahoma, Texas, Utah, Virginia, Washington, Wisconsin, and the District of Columbia.
http://www.epa.gov/ozone/snap/refrigerants/hc-12a.html
It has been illegal since July 13, 1995 to replace CFC-12 with the HC-12a® formulation that was submitted for SNAP review in any refrigeration or A/C application other than industrial process refrigeration. The same prohibition for OZ-12® took effect on April 18, 1994. Because DURACOOL 12a® has the same chemical composition as the HC-12a® formulation that was submitted for SNAP review (i.e., Hydrocarbon Blend B), DURACOOL 12a® is also subject to the same restrictions.
HC-12a®, as reformulated to meet DOT requirements, is not the same as Hydrocarbon Blend B and has not been submitted for SNAP review. OZ Technology is therefore prohibited from marketing this blend as a substitute for any ozone-depleting substance. In addition, any use of this blend as a substitute for CFC-12 or any other ozone-depleting chemical, in industrial process refrigeration or any other refrigeration or A/C end use, is prohibited under the Clean Air Act.
In addition to the prohibition on use described above, and the federal law banning the venting of all refrigerants, there are also state and local statutes and regulations that relate to certain uses of hydrocarbons. As of the printing date of this fact sheet, EPA is aware that the following states prohibit the use of flammable refrigerants in automobile air conditioners: Arkansas, Arizona, Connecticut, Florida, Idaho, Iowa, Indiana, Kansas, Louisiana, Maryland, Nebraska, North Dakota, Oklahoma, Texas, Utah, Virginia, Washington, Wisconsin, and the District of Columbia.
Originally Posted By: RiceCake
Yeah yeah I looked that up better I know. R-12 could be a hard find or not though as the entire supply of it relies on recycled gas, since its obviously illegal to manufacture anymore.
Wrong again. It is not illegal.
Just stop, please . For the sake of anyone reading what you say.
Yeah yeah I looked that up better I know. R-12 could be a hard find or not though as the entire supply of it relies on recycled gas, since its obviously illegal to manufacture anymore.
Wrong again. It is not illegal.
Just stop, please . For the sake of anyone reading what you say.
Originally Posted By: Donald
I would take it to a A/C place, you will pay a lot more at a dealership. The A/C place probably knows more about A/Cs than the dealership. If you do not know any, ask at a local NAPA who they would suggest. Do not try and try to fix this yourself.
My 1993 Suburban had R12, so it was still in use at that point in time. That does not mean Toyota was still using it.
Lastly the vehicle is 20 years old. Do you really need A/C? You are in Canada not Florida.
Yeah. Your in Canada,where we live in igloos and run dog sleds once our cars get snowed in and they quit plowing the the roads.
Donald. Where I live goes from -40f to 100f from winter to summer. Do you think that AC might be of some use on those 90-100 degree days or do you not use it either.
Some of the posts I read show me how truly ignorant some people are.
Op. I would find a shop that specializes in this. Then you know it was done right,and if they dont do it right you can take it back and have them try again. Some things aren't worth trying to save a buck by doing it yourself.
My construction company has a slogan.
"Home building is not a hobby. Hire a professional.
I think that may apply here.
I would take it to a A/C place, you will pay a lot more at a dealership. The A/C place probably knows more about A/Cs than the dealership. If you do not know any, ask at a local NAPA who they would suggest. Do not try and try to fix this yourself.
My 1993 Suburban had R12, so it was still in use at that point in time. That does not mean Toyota was still using it.
Lastly the vehicle is 20 years old. Do you really need A/C? You are in Canada not Florida.
Yeah. Your in Canada,where we live in igloos and run dog sleds once our cars get snowed in and they quit plowing the the roads.
Donald. Where I live goes from -40f to 100f from winter to summer. Do you think that AC might be of some use on those 90-100 degree days or do you not use it either.
Some of the posts I read show me how truly ignorant some people are.
Op. I would find a shop that specializes in this. Then you know it was done right,and if they dont do it right you can take it back and have them try again. Some things aren't worth trying to save a buck by doing it yourself.
My construction company has a slogan.
"Home building is not a hobby. Hire a professional.
I think that may apply here.
94 used R134a.
R12 is available, if you know who to talk to. I am pretty sure, one interesting development out of the Montreal Protocol, was to keep 3rd world/developing nations out of the ban -- meaning they could still mfg it.....
Gotta love politics.
R12 is available, if you know who to talk to. I am pretty sure, one interesting development out of the Montreal Protocol, was to keep 3rd world/developing nations out of the ban -- meaning they could still mfg it.....
Gotta love politics.
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