spanky2151 Posted July 21, 2007 Share Posted July 21, 2007 Hi i just had a friend vacume out my ac because it had R12 in it and was not cooling any longer. But we did not remember how much pressure was in there. :rant: I need to know how many pounds of pressure of R134a to put in the old R12 System. The car has a 1.5 in it if that helps or makes a difference. Thanks Link to comment Share on other sites More sharing options...
Kastigir Posted July 21, 2007 Share Posted July 21, 2007 Hi i just had a friend vacume out my ac because it had R12 in it and was not cooling any longer. But we did not remember how much pressure was in there. :rant: I need to know how many pounds of pressure of R134a to put in the old R12 System. The car has a 1.5 in it if that helps or makes a difference. Thanks Look under your hood. There should be a label for the A/C. The ounces of refrigerant will be listed on it. Off hand I'd say 14-16 ounces. Link to comment Share on other sites More sharing options...
spanky2151 Posted July 21, 2007 Author Share Posted July 21, 2007 Thank you SIt says 21Oz min. 23oz Max so ya 16Oz would be about right but at what pressure? and the cans i have are 12 Oz Cans do the sell 16 oz cans? Thank You so Very much for the reply. :thumbup: Link to comment Share on other sites More sharing options...
Kastigir Posted July 22, 2007 Share Posted July 22, 2007 Thank you SIt says 21Oz min. 23oz Max so ya 16Oz would be about right but at what pressure? and the cans i have are 12 Oz Cans do the sell 16 oz cans? Thank You so Very much for the reply. :thumbup: Then you must put in 21-23 ounces. There are places that sell 16 ounce cans, but you'd probably be better off picking up two 12 ounce cans and throwing them in there. You won't get a full 12 ounces out of each can. Link to comment Share on other sites More sharing options...
spanky2151 Posted July 23, 2007 Author Share Posted July 23, 2007 all's well, and my ac is soooo cold thank you Kastigir Link to comment Share on other sites More sharing options...
Kastigir Posted July 23, 2007 Share Posted July 23, 2007 Glad I could help. I had to do this in my Civic last year when I converted to 134a. It all leaked out after the summer, and now it won't hold any refrigerant for even 12 hours. I just don't drive it when it's extremely hot outside. Link to comment Share on other sites More sharing options...
TS John Posted July 23, 2007 Share Posted July 23, 2007 How do you convert? Do you just do a flush and refill it with the right stuff or is there anything else that needs changing? Link to comment Share on other sites More sharing options...
Joe W Posted July 23, 2007 Share Posted July 23, 2007 You need to retrofit your service ports and make sure all of the r12 is out of the system and refill with 134a refrigerent, maybe some small other things. Link to comment Share on other sites More sharing options...
Kastigir Posted July 23, 2007 Share Posted July 23, 2007 You need to retrofit your service ports and make sure all of the r12 is out of the system and refill with 134a refrigerent, maybe some small other things. Yes. Most auto parts stores will sell the conversion kit. You then need to run your car to a shop that does A/C work and have them evacuate the system. Hook up the new canister, open valve and start the engine with the A/C on. Eventually the A/C unit will turn on once it has enough pressure, about 12 ounces or so. Link to comment Share on other sites More sharing options...
cranny Posted July 24, 2007 Share Posted July 24, 2007 now they have R404a. Link to comment Share on other sites More sharing options...
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