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The Detailed E30 R-134a Conversion Thread/DIY

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    Any idea why the OP changed the expansion valve when his car already had the R134 one installed?
    /// MTech Belts ///


    S52 BUILD


    Instagram: @martino_motorsport

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      I replaced mine because it would have sucked if it needed to be replaced later.

      [IMG]https://cimg4.ibsrv.net/gimg/my350z.com-vbulletin/550x225/80-parkerbsig_5096690e71d912ec1addc4a84e99c374685fc03 8.jpg[/IMG

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        why are people converting to r134a?

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          Because R12 is expensive and harms the ozone.

          [IMG]https://cimg4.ibsrv.net/gimg/my350z.com-vbulletin/550x225/80-parkerbsig_5096690e71d912ec1addc4a84e99c374685fc03 8.jpg[/IMG

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            Hello everyone, and many thanks to glucklich21 for putting this thread together and all that have contributed with valuable info since 2012!

            I want to get this conversion done on my 89 325i vert and have ordered all parts, except for the compressor. I have read all 33 pages of this thread several times to make sure I have not missed the answer. I want to replace my Denso 10P15E (not working) with a new 134a compressor.

            I see a lot of talk about new, cheap and efficient, 134a compressors that can only be mounted with adapter kits. But there are no adapter kits to be found so this option is more of a tease and useless to me.

            Can any one help me find a new 134a direct replacement for my M20 engine currently fitted with a denso 10P15E?

            I dont think I care about the cost at this point, just want to get this job done so that I can use the car during the summer in Miami. Thanks!
            Youtube Channel
            '89 325i Convertible
            '19 VW Atlas
            '19 Subaru STI

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              I thought the existing compressor worked fine as long as you got the correct lubricant for it.

              Comment


                Originally posted by PDXPeter View Post
                I thought the existing compressor worked fine as long as you got the correct lubricant for it.
                Based on my understanding, it should be possible to replace the seals and oil to make it work with R-134a. But Im also reading that R12 compressors will not be as efficient in a converted system. Since my current compressor was diagnosed as bad and I need to replace it anyways, it would be ideal if I can get a new R-134a specific compressor.

                Unfortunately, I have not found any that I can just bolt on. Im considering getting some adapters fabricated. Im pretty sure I even saw some blueprints for the adapters on one if these threads but now I cant find it.
                Youtube Channel
                '89 325i Convertible
                '19 VW Atlas
                '19 Subaru STI

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                  If I was going to replace the pump I would see if I could find an all electric one like this:
                  https://www.seanhylandmotorsport.com...right-for-you/

                  Comment


                    Originally posted by PDXPeter View Post
                    If I was going to replace the pump I would see if I could find an all electric one like this:
                    https://www.seanhylandmotorsport.com...right-for-you/
                    The concept is cool (no pun intended) but at that price it's clearly not for e30s
                    Deck Lid and soft top Shocks on hand

                    Seat shocks on hand for immediate shipment
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                      Originally posted by jeffnhiscars View Post
                      The concept is cool (no pun intended) but at that price it's clearly not for e30s
                      Maybe. I found you can get an electric pump from a Prius on ebay for $125 or so. The have a potential 30amp draw though and would probably require a larger alternator.

                      Comment


                        Originally posted by PDXPeter View Post
                        Maybe. I found you can get an electric pump from a Prius on ebay for $125 or so. The have a potential 30amp draw though and would probably require a larger alternator.
                        Exactly....and I would never mention that my e30 has ANYTHING from a Prius.

                        Just sayin :)
                        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


                          Whats wrong with Priii?

                          lol

                          We have a '15 and it's great.

                          [IMG]https://cimg4.ibsrv.net/gimg/my350z.com-vbulletin/550x225/80-parkerbsig_5096690e71d912ec1addc4a84e99c374685fc03 8.jpg[/IMG

                          Comment


                            Originally posted by jeffnhiscars View Post
                            Exactly....and I would never mention that my e30 has ANYTHING from a Prius.

                            Just sayin :)
                            LOL, the Tesla one is only about $200 :D

                            Comment


                              Originally posted by jeffnhiscars View Post
                              Exactly....and I would never mention that my e30 has ANYTHING from a Prius.

                              Just sayin :)

                              Kinda like putting a plaid golf umbrella cover in your E30....???
                              1992 325i 'vert
                              1988 320i Touring
                              1977 530i
                              2015 328i - Euro Delivery/Performance Center Delivery
                              2001 325i - R.I.P.
                              BMWCCA
                              E30CCA

                              Comment


                                Originally posted by jeffnhiscars View Post
                                I'm just stating a fact, but....I will look in to making these when we get back from Canada since there is clearly a need.
                                Hi Jeff,
                                Any chance you can share the details on what exactly needs to be fabricated for this? Im willing to find a machinist to make them and ship them at cost to anyone interested.

                                Is it just an adapter to fit the compressor onto the OEM tensioner bracket, to the engine mount bracket, or both? Would the adapters be different depending on the r12 compressor in place (Denso, Behr, etc)?

                                I never imagined it would be such a PITA to replace the compressor on these cars.

                                Thanks.
                                Youtube Channel
                                '89 325i Convertible
                                '19 VW Atlas
                                '19 Subaru STI

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