jimkup Posted June 8, 2006 Share Posted June 8, 2006 Howdy folks, A ? regarding A/C conversion from R-12 to R-134a. My system has R-12 & that stuff is next to impossible to get. Has been doing fine till recently when it slowly went from cold air to ...not cold. Has anyone ever topped off their R-12 system w/ R-134 (without total evacuation and re-charge)...& it worked? I know on the can of R-134 it says do not mix w/ R-12....but??? Thanks! Quote Link to comment Share on other sites More sharing options...
subbum Posted June 9, 2006 Share Posted June 9, 2006 I am looking at converting my '88 to R-134. The conversion kits run around $40 and look simple to install. You have to have a shop clean out your system before you can recharge it with the new stuff. From what I understand, if you do not get all of the R-12 and lubricant out it will not work very well. Quote Link to comment Share on other sites More sharing options...
nomoaudi Posted June 9, 2006 Share Posted June 9, 2006 Do not recharge with a r12 sytem with 134a. The two are not compatable. The assumtion that replacing r12 with r134a is easy, is a fallacy. Synthetic oils must be used with r134a. It is not readily mix with mineral oil or alkylbenzine lubricants, the proper lubes are: poyol ester oil or/and polyalkylene glycol depending upon what the manufacturer deems apropiate for the application. As far as the retrofiting goes an increase of condenser and evaporator size of up to 30% over a similar r12 system is comon practice. also, the desiccant used with r134a is a molcular seive. r12 used a silicone gel. Hoses are usually smaller in diameter in a r134a system as compared to those of a r12 system. The control systems also vary, and are important to the proper operation of the system. Along with the above mentioned items. Quote Link to comment Share on other sites More sharing options...
jimkup Posted June 9, 2006 Author Share Posted June 9, 2006 ok, thanks...that's exactly what I was looking for! Quote Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted June 9, 2006 Share Posted June 9, 2006 Well... I just saw this: http://www.jcwhitney.com/autoparts/Product/tf-Browse/s-10101/Pr-p_Product.CATENTRY_ID:2002826/showCustom-0/p-2002826/N-111+600006856+10714/c-10614 It is Interesting, about "Retrofit" the R134a. Good Luck! Quote Link to comment Share on other sites More sharing options...
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