Announcement

Collapse
No announcement yet.

How to distinguish barrier AC hoses?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    How to distinguish barrier AC hoses?

    I'm doing an R134 conversion as part of my engine swap.. the car is an early 85 so no barrier hoses. How can one tell if a hose is a barrier type? I need the ones under the dash, and I see them on Ebay but I don't want to plunk down money and end up with the same I already have. Any markings, etc that could narrow it down?
    1985 325e -> M60 swap project
    1983 GTV6
    1974 X1/9

    #2
    I don’t believe that they were ever sold as barrier hoses. If you want to convert them, you’ll need to go get barrier hose crimped on.
    2006 GMC Sierra 2500HD 4WD LBZ/Allison
    2002 BMW M3 Alpinweiß/Black
    1999 323i GTS2 Alpinweiß
    1995 M3 Dakargelb/Black
    - S50B32/S6S420G/3.91
    1990 325is Brilliantrot/Tan
    1989 M3 Alpinweiß/Black

    Hers: 1996 Porsche 911 Turbo Black/Black
    Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

    sigpic

    Comment


      #3
      I don't believe there is a uniform standard of hose marking, but I can say that if you see any with Eaton labelled hose you should be in business.

      If you want to be really sure, just make your own SUR&R and Eaton EZ Clip systems/kits are out there that will work for the application, but maybe not the budget.

      Comment


        #4
        Way back when, I bought a hose crimping kit. It’s been very valuable to me.
        2006 GMC Sierra 2500HD 4WD LBZ/Allison
        2002 BMW M3 Alpinweiß/Black
        1999 323i GTS2 Alpinweiß
        1995 M3 Dakargelb/Black
        - S50B32/S6S420G/3.91
        1990 325is Brilliantrot/Tan
        1989 M3 Alpinweiß/Black

        Hers: 1996 Porsche 911 Turbo Black/Black
        Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

        sigpic

        Comment


          #5
          Not sure exactly which hoses you are needing, but I've been able to get several 134a hoses new from BMW. On the parts diagram at RealOEM, it will list whether the hose is compatible with 134a. Just be sitting down when you find a current price.
          1992 325i 'vert
          1988 320i Touring
          1977 530i
          2015 328i - Euro Delivery/Performance Center Delivery
          2001 325i - R.I.P.
          BMWCCA
          E30CCA

          Comment


            #6
            Originally posted by cory58 View Post
            Not sure exactly which hoses you are needing, but I've been able to get several 134a hoses new from BMW. On the parts diagram at RealOEM, it will list whether the hose is compatible with 134a. Just be sitting down when you find a current price.
            WAY cheaper to get new hose crimped on to the old ends.
            2006 GMC Sierra 2500HD 4WD LBZ/Allison
            2002 BMW M3 Alpinweiß/Black
            1999 323i GTS2 Alpinweiß
            1995 M3 Dakargelb/Black
            - S50B32/S6S420G/3.91
            1990 325is Brilliantrot/Tan
            1989 M3 Alpinweiß/Black

            Hers: 1996 Porsche 911 Turbo Black/Black
            Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

            sigpic

            Comment


              #7
              Originally posted by nrubenstein View Post
              WAY cheaper to get new hose crimped on to the old ends.

              So true if you have a good crimping tool or reliable source for hoses.
              1992 325i 'vert
              1988 320i Touring
              1977 530i
              2015 328i - Euro Delivery/Performance Center Delivery
              2001 325i - R.I.P.
              BMWCCA
              E30CCA

              Comment


                #8
                I spoke with Aeroquip who made the OE hoses I was replacing and they confirmed they were not barrier hoses. They also gave me the spec for refrigerant leakage in grams/inch/hour or something to that effect. The difference between r12 and f134 on the OE hoses was about 10x, keeping in mind that the mineral oil impregnated in to the OE hose will help in the short term.

                I also needed the 2 hoses behind the glove box and one was NLA the other was silly expensive. Luckily I found a NIB pair on eBay from a seller In Israel, and sent those out to have the hoses converted. As I recall, barrier hose is actually thinner than non and typically there are markings just as there are on fuel lines so you can tell what you've got.

                Look for shops that do hydraulics as some are equipped for and are willing to do hose upgrades.

                Hoses to the condenser are still available and are upgraded. I just bought the condenser to drier hose on amazon for $37. Made by Four Season who makes most of the replacement AC parts sold, including compressors. FWIW I also got a behr drier on amazon for $18.
                Deck Lid and soft top Shocks on hand

                Seat shocks on hand for immediate shipment
                https://www.r3vlimited.com/board/sho...86#post4944786
                Alice the Time Capsule
                http://www.r3vlimited.com/board/showthread.php?t=360504
                87 Zinno Cabrio barn find 98k and still smells like a barn. Build thread http://www.r3vlimited.com/board/show...20#post3455220

                Comment


                  #9
                  Thanks all for the tips. I think I'll find a place to re-crimp. I'm going to need some hose work done on the M60 PS pump anyhow.
                  1985 325e -> M60 swap project
                  1983 GTV6
                  1974 X1/9

                  Comment


                    #10
                    Its technically for ac only not hydraulic lines but the mastercool manual crimp tool is $150 well spent on a very nicely made easy to use tool. Coldhose.com has all the bits and pieces you need to make pretty much any line.

                    https://www.amazon.com/MASTERCOOL-71.../dp/B000WBQ4U2

                    Comment


                      #11
                      Originally posted by r-mm View Post
                      Its technically for ac only not hydraulic lines but the mastercool manual crimp tool is $150 well spent on a very nicely made easy to use tool. Coldhose.com has all the bits and pieces you need to make pretty much any line.

                      https://www.amazon.com/MASTERCOOL-71.../dp/B000WBQ4U2
                      Yeah, I have this. (It was a lot more expensive when I bought it.) It’s a real game changer for AC work.

                      That said, if you’re only doing one car, it’s probably still cheaper to get a shop to do it. And a proper hydraulic crimper will get a nicer crimp on.
                      2006 GMC Sierra 2500HD 4WD LBZ/Allison
                      2002 BMW M3 Alpinweiß/Black
                      1999 323i GTS2 Alpinweiß
                      1995 M3 Dakargelb/Black
                      - S50B32/S6S420G/3.91
                      1990 325is Brilliantrot/Tan
                      1989 M3 Alpinweiß/Black

                      Hers: 1996 Porsche 911 Turbo Black/Black
                      Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd

                      sigpic

                      Comment

                      Working...
                      X