A/C Recharge

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  • anokES
    Wrencher
    • Aug 2012
    • 206

    #1

    A/C Recharge

    How do you guys do this? R12 replacements - the conversion to R134 or what?
  • ELVA164
    R3V Elite
    • Dec 2011
    • 4861

    #2
    Check the DIY section, there's a really good writeup on the R134a conversion process.
    Interested in vintage cars? Ever thought about racing one? Info, photos, videos, and more can be found at www.michaelsvintageracing.com!

    Elva Courier build thread here!

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    • Gregs///M
      Forum Sponsor
      • Mar 2012
      • 2459

      #3
      Try Envirosafe. http://www.es-refrigerants.com/

      I've been using their R12 alternative for over 4 years and my AC blows colder than my E46. Fantastic stuff and they have DIY kits.
      Owner - Bavarian Restoration
      BMW and European Electronics Repair and Restoration
      www.BavRest.com
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      • anokES
        Wrencher
        • Aug 2012
        • 206

        #4
        Thanks guys

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        • anokES
          Wrencher
          • Aug 2012
          • 206

          #5
          Gregs, what product do you use on the website?

          Comment

          • mpowerful
            E30 Fanatic
            • Jul 2013
            • 1273

            #6
            You can use the one meant for automotive with the dye or the one without the dye. The one without the dye is cheaper.

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            • anokES
              Wrencher
              • Aug 2012
              • 206

              #7
              so the 134a will work to replace R-12?

              Comment

              • Gregs///M
                Forum Sponsor
                • Mar 2012
                • 2459

                #8
                I believe it was this stuff.



                However, I would call the company to verify before ordering. I believe their refrigerant is both R134a and R12 compatible.
                Owner - Bavarian Restoration
                BMW and European Electronics Repair and Restoration
                www.BavRest.com
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                Our Facebook!
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                • Hoffbrohaus
                  E30 Addict
                  • Sep 2013
                  • 519

                  #9
                  Just placed an order for this stuff. I'll let you guys know how it works out in Phoenix, AZ where it is now 107 degrees.
                  '90 325is

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                  • Hoffbrohaus
                    E30 Addict
                    • Sep 2013
                    • 519

                    #10
                    Got it and tried it out today. My temperature started at 70 degrees from the vent and 1 can of stop leak, 2 cans of refrigerant later it stayed at 70 degrees. Before I use my last can I thought I'd ask...

                    Gregs///M am I doing something wrong? Here's the port I hooked up to it's the low side right?

                    Click image for larger version

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                    I couldn't figure out the pressure either. From what I found you want 20psi on an R-12 system. Or 40 degrees on the 134a scale. Mine was up around 60psi the whole time.

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                    '90 325is

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                    • Jaxx_
                      E30 Mastermind
                      • Dec 2009
                      • 1880

                      #11
                      Originally posted by Hoffbrohaus
                      Got it and tried it out today. My temperature started at 70 degrees from the vent and 1 can of stop leak, 2 cans of refrigerant later it stayed at 70 degrees. Before I use my last can I thought I'd ask...

                      Gregs///M am I doing something wrong? Here's the port I hooked up to it's the low side right?

                      [ATTACH]85606[/ATTACH]

                      I couldn't figure out the pressure either. From what I found you want 20psi on an R-12 system. Or 40 degrees on the 134a scale. Mine was up around 60psi the whole time.

                      [ATTACH]85607[/ATTACH]
                      uhh overcharged?
                      '84 318i M10B18 147- Safari Beige
                      NA: 93whp/90ftlbs, MS2E w/ LC, 2-Step
                      Turbo: 221whp/214ftlbs, MS3x flex @ 17psi

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                      • Hoffbrohaus
                        E30 Addict
                        • Sep 2013
                        • 519

                        #12
                        Yea logically I would think that but that would mean it was over charged when I bought it? Could be. But the sight glass looked like it was under charged.

                        Sent from my SCH-I605 using Tapatalk
                        '90 325is

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                        • Hoffbrohaus
                          E30 Addict
                          • Sep 2013
                          • 519

                          #13
                          Originally posted by Jaxx_
                          uhh overcharged?
                          so can someone verify 20 psi is correct? I can't believe I'm that far overcharged.

                          Sent from my SCH-I605 using Tapatalk
                          '90 325is

                          Comment

                          • Hoffbrohaus
                            E30 Addict
                            • Sep 2013
                            • 519

                            #14
                            Pelicanparts.com article says 40 - 50 psi

                            Sent from my SCH-I605 using Tapatalk
                            '90 325is

                            Comment

                            • Jaxx_
                              E30 Mastermind
                              • Dec 2009
                              • 1880

                              #15
                              Originally posted by Hoffbrohaus
                              Pelicanparts.com article says 40 - 50 psi

                              Sent from my SCH-I605 using Tapatalk
                              sounds about right. I could be mistaken, but charging shouldn't technically be done by low-side pressure. Instead, it should be done by weight.
                              '84 318i M10B18 147- Safari Beige
                              NA: 93whp/90ftlbs, MS2E w/ LC, 2-Step
                              Turbo: 221whp/214ftlbs, MS3x flex @ 17psi

                              Comment

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