Announcement

Collapse
No announcement yet.

The Detailed E30 R-134a Conversion Thread/DIY

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

    Cars with Oil Cooler:

    My car has an Oil Cooler in front of the Condenser (1989 325i Convertible Auto) and I am half way through the Condenser replacement, but seems that the old Condenser will not come out without removing that Oil Cooler first. Has anyone with an Oil Cooler car successfully remove the Condenser with the Oil Cooler in place?
    The other option I see is to remove the Radiator, but I have just done a Cooling System overhaul and would hate to drain the Radiator and remove it and all that goes with that.


    Resolved: I removed the Cooler Lines Bracket then removed the Bolts that hold the Cooler in place and that provided a lot of room to maneuver the Condenser out. I clearly over-reacted.

    Thanks
    Last edited by Westija; 07-05-2021, 01:03 PM.

    Comment


      I have a 91 318is with M42. Any specific lines i would have to make R134a compatible? On realoem, hose 5 and 8 say R12 while the others say R12/R134a. So im assuming 5 and 8 must not be R134a compatible? For 5 im thinking 64538391040 and for 8 64538391051 as replacements but not 100% sure.
      Last edited by AmosCake; 07-07-2021, 04:29 PM.

      Comment


        Any replacement hose you buy new will be r134 compatible
        Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com

        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


          Originally posted by AmosCake View Post
          I have a 91 318is with M42. Any specific lines i would have to make R134a compatible? On realoem, hose 5 and 8 say R12 while the others say R12/R134a. So im assuming 5 and 8 must not be R134a compatible? For 5 im thinking 64538391040 and for 8 64538391051 as replacements but not 100% sure.
          RealOEM shows part 1040 superseding the old R12 hose part number, which means 1040 will fit your car. Different situation for part 1051. RealOEM does not show a replacement for the R12 hose (part 4234) and that hose is specific to the M42, so you can't count on 1051 fitting your car. Unless someone with an M42 chimes in here, I would recommend going to your local dealer and asking the question at the parts counter. Up to you whether you buy the hose from them after they help you out (I would).
          1992 325i Cabrio
          1988 320i Touring
          2000 M5
          1977 530i
          2015 328i - Euro Delivery/Performance Center Delivery
          BMWCCA
          E30CCA

          Comment


            Originally posted by jeffnhiscars View Post
            Any replacement hose you buy new will be r134 compatible
            Jeff is probably right, but it would be just my luck to end up with a hose that's been sitting on a shelf since 1988.
            1992 325i Cabrio
            1988 320i Touring
            2000 M5
            1977 530i
            2015 328i - Euro Delivery/Performance Center Delivery
            BMWCCA
            E30CCA

            Comment


              Originally posted by cory58 View Post

              RealOEM shows part 1040 superseding the old R12 hose part number, which means 1040 will fit your car. Different situation for part 1051. RealOEM does not show a replacement for the R12 hose (part 4234) and that hose is specific to the M42, so you can't count on 1051 fitting your car. Unless someone with an M42 chimes in here, I would recommend going to your local dealer and asking the question at the parts counter. Up to you whether you buy the hose from them after they help you out (I would).
              Yeah i searched that part up and its for verts and sedans but since its R134a compatible i checked to see if it would fit and according to ECS tuning it is compatible

              Comment


                Originally posted by cory58 View Post

                Jeff is probably right, but it would be just my luck to end up with a hose that's been sitting on a shelf since 1988.
                The final bits of my AC that I replaced were the 2 hoses that go from the firewall to the evaporator (behind the glove box). They were NOS off of eBay from a seller in Israel. One was NLA and the other was dealer only, hence stupid expensive. The day they arrived I sent them to a hose shop who replaced the decades old new r12 hoses with barrier hose. $75 later it was done.

                im guessing but I doubt you'll find NOS anywhere on the planet. Just sayin' :)
                Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com

                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


                  Originally posted by nick.cbr View Post

                  This. I made zero changes to my hardware. Verified system held vacuum and charged with FrostyCool R12a that I got on eBay (I think it's a way better deal to buy direct from their website even though shipping is ~$19 though so I'd probably avoid the eBay seller). I was getting 41*F at the center vents on idle (fan on 2, recirc ON) and a consistent 33*F at cruise (at one point I saw 32.x*F). Ambient temp was ~70*F and very high humidity; waiting for the heat to come back to do some more testing but I expect some pretty good performance out of the system.

                  Per the FrostyCool website, I used 11oz of their R12a refrigerant to charge the E30 system that calls for 2.1lbs (+/- .05) of R12. For equipment, I used some manifold gauges, R134a conversion fittings and a two-stage vacuum pump - all off Amazon. I left my existing dual pressure switch setup in place as well as the stock expansion valve. I'm still playing with things so I'll report back with more concrete data on pressures and things like that. I thought I may have overcharged the system so I vented some refrigerant out and now I believe it's under-charged again as my idle vent temps went up to 52*F and cruise vent is 37*F. All of this is on factory R12 parts namely the condenser (fin/tube not parallel flow).

                  I had another E30 325iX converted to R134a about 10 years ago and that car performed admirably; however, I really think sticking with the R12 system (tube and fin condenser), replacing the dryer and all the o-rings is the correct solution for these cars. Based on my research, I'm just not concerned about running a hydrocarbon-based refrigerant either (a common argument against R12a). It is unfortunate that the EPA hasn't approved this as a replacement for R12 systems as it is better for the environment than even R134a (which is no longer in favor anyway as everyone is switching to R1234yf or whatever it is).
                  Would you mind linking the Amazon purchases for the rest of us?

                  Comment


                    Is FrostyCool R12a the same thing as or similar to HC-12a? The FrostyCool web site says it's flammable but doesn't have an MSDS or ingredient list.
                    1992 325i Cabrio
                    1988 320i Touring
                    2000 M5
                    1977 530i
                    2015 328i - Euro Delivery/Performance Center Delivery
                    BMWCCA
                    E30CCA

                    Comment


                      how does one fill the new dryer with PAG oil?

                      Comment


                        You don't fill it. SOP is to add 10cc for a drier or replacement hose and you can use a syringe to measure and push it in.
                        Seat Shocks....I have passed the baton to John Christy from Ninestitch. Email John or Garrett at ninestitch1@gmail.com

                        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


                          Originally posted by jeffnhiscars View Post
                          You don't fill it. SOP is to add 10cc for a drier or replacement hose and you can use a syringe to measure and push it in.
                          You insert the syringe through one of the ports the hoses connect to? Thanks for response

                          Comment

                          Working...
                          X