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1. J

   AC Retrofit questions 2022

   • Jfreeman
   • 4 mo ago
   • MKIII Technical

   19

   656

   4 mo ago

    by Jfreeman
   1. 

      SupraMikeCT

      · 92 TURBO

      Joined Apr 4, 2004

      ·

      1,786 Posts

      #19 · 4 mo ago (Edited)

      Only show this user

      Whoosh10 said:

      I'll let the more knowledgeable give you the definitive answer.. but I think the old R12 seals just wouldn't hold up to R134a. You might be fine with those greens ones for R12 though. I just can't give you a definitive answer.
      
      @SupraMikeCT, this question seems right up your alley.

      Click to expand...

      @Woosh10 is correct, the old black seals and O rings will not hold up to R134a refrigerant. The green and the Toyota red O rings will work with either R12 & R134a.
      
      

      https://www.aliexpress.us/item/3256802929913070.html?gatewayAdapt=glo2usa4itemAdapt&_randl_shipto=US

      
      Green manifold gasket for the MK3's Supra ND 10PA17 compressor manifold when converting to R134a:
      
      

      https://www.napaonline.com/en/p/TEM207193?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Heating-Cooling-Climate-Control&campaign_id=10947735025&adgroup_id=107081865506&adtype=pla&gclid=Cj0KCQjwyt-ZBhCNARIsAKH1174ef2H5Sed9pCSXPheGjAjIOj-tonn6yGI4t-4qRkPRo7kRG2Q8QA0aAqrDEALw_wcB&gclsrc=aw.ds&

      
      EDIT:
      BTW, I would use Ester oil instead of PAG if I were converting to R134a. Ester oil is more compatable with any remaining mineral oil than PAG oil.
      The desiccant used in new receiver/driers also work for both refrigerants

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   2. J

      Jfreeman

      · Registered

      Joined 11 mo ago

      ·

      76 Posts

      Discussion Starter · #20 · 4 mo ago

      Only show this user

      SupraMikeCT said:

      @Woosh10 is correct, the old black seals and O rings will not hold up to R134a refrigerant. The green and the Toyota red O rings will work with either R12 & R134a.
      
      

      https://www.aliexpress.us/item/3256802929913070.html?gatewayAdapt=glo2usa4itemAdapt&_randl_shipto=US

      
      Green manifold gasket for the MK3's Supra ND 10PA17 compressor manifold when converting to R134a:
      
      

      https://www.napaonline.com/en/p/TEM207193?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Heating-Cooling-Climate-Control&campaign_id=10947735025&adgroup_id=107081865506&adtype=pla&gclid=Cj0KCQjwyt-ZBhCNARIsAKH1174ef2H5Sed9pCSXPheGjAjIOj-tonn6yGI4t-4qRkPRo7kRG2Q8QA0aAqrDEALw_wcB&gclsrc=aw.ds&

      
      EDIT:
      BTW, I would use Ester oil instead of PAG if I were converting to R134a. Ester oil is more compatable with any remaining mineral oil than PAG oil.
      The desiccant used in new receiver/driers also work for both refrigerants

      Click to expand...

      I want to maintain r12, so I will swap over the seals to green if I have leaks from a vacuum test.

      Show Less

       

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