1990 Mazda Miata AC Conversion R12 to R134a | HOW TO | TUTORIAL

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  • čas přidán 27. 08. 2024
  • Today I convert my 1990 Mazda Miata from the old R12 AC system to the more modern R134a system from a 1996 Mazda Miata. This video covers everything under the hood! Who says a racecar can't be cool?!
    Applicable for 1990-1993 Miata's with R12 AC System.
    #Mazda #Miata #HowTo #Tutorial #AC #R134a #R12 #ACConversion #CoolRaceCar #SummerHeatNoJoke #SouthCarolina

Komentáře • 61

  • @homer4163
    @homer4163 Před měsícem +1

    Great video, very informative. I like how you did a side-by-side of every component of the R12 vs R134a system so we could see the difference. No other video does that , and it helped me immensely. Thanks!

  • @christianzinn7636
    @christianzinn7636 Před 2 lety +8

    Very Well Done!!! You taught me that the 1997 NA is 134 already and I didn't know that before, so Thank You Very Much for that. I like your style. I spoke clearly and at the right speed. You are one of the first black men if not the first on CZcams doing work on the Miata and I'm super impressed and subscribed right away.

    • @sidbrant
      @sidbrant  Před 2 lety

      I appreciate it man! Glad the video helped

  • @jesselarios2849
    @jesselarios2849 Před rokem +3

    just finished installing a 95/96 system in my 91 and gotta say it is so good to have COLD ac out here in TX in time for summer thanks so much for this tutorial it helped me so much in figuring this whole process out can’t thank you enough!

    • @sidbrant
      @sidbrant  Před rokem +1

      I'm glad the video helped and it works, A/C is definitely a blessing!

  • @kyozen233
    @kyozen233 Před rokem +2

    Appreciate the video I'm going to do this for my 92 and be done with it.. I did a temporary retrofit to the r12 system (r134 fill valves, drier, green orings) and had it charged with r134 and it blew cold for 4 months before needing another charge.

    • @sidbrant
      @sidbrant  Před rokem +1

      It's worth the effort if you want it to last, don't forget to do the evaporator and expansion valve also. I didn't get to show it in this video since I did it months before this stuff

    • @kyozen233
      @kyozen233 Před rokem

      @@sidbrant Absolutely. The original core had a stuck valve. I bought a new evaporator core w expansion valve. The car also smells better.

  • @WiSeNhEiMeR-1369
    @WiSeNhEiMeR-1369 Před rokem +1

    HOWdy S-B, ...
    Thank YOU for the Conversion TUTORIAL
    1993 "NA" MIATA ( Automatic Transmission)
    COOP
    the WiSeNhEiMeR from Richmond, INDIANA
    ...

    • @sidbrant
      @sidbrant  Před rokem

      Hey man, you're welcome! I hope it helped

  • @SkoozAnu
    @SkoozAnu Před 2 lety +5

    Awesome video! Do you know if the new compressor used as much energy as the old one? I've been looking for a way to keep the A/C from sapping so much power.

    • @sidbrant
      @sidbrant  Před 2 lety +2

      It seems to be the same to me

    • @sidbrant
      @sidbrant  Před 2 lety +2

      When I had turbocharged my car, it seemed better in boost with ac on

  • @stumpbumpers
    @stumpbumpers Před rokem +1

    I just bought a nice stock 90. The low pressure line is changed already, but the high pressure line seems to be stock. How I understand it, the system does not need to be replaced to run r134 in a r12 system. The seals should be replaced with green seals. However it will work with the old seals for a short time, before the seals go bad. I tried recharging mine and it was taking r134 but not holding pressure. I found a nice bubbling leak at the top line going into compressor. I have yet to take the line off and reseal it. I guess at that time, I’ll find out if the seals are green. If it’s black, I guess I’ll be resealing the whole system. Probably a good idea anyway. Compressor works fine and changes engine rpms. Feel free to correct or offer advice👍

    • @sidbrant
      @sidbrant  Před rokem +1

      I ran the old system with new R134a seals for a little while and it did work until the compressor's seals went. Problem is the R12 lines don't work with the R134A compressor along with other parts that are also not compatible with the old system. Which lead to this video lol

  • @adamaris6118
    @adamaris6118 Před 2 lety +1

    doing this exact thing on my 94 & 91 miata this video was soooo helpful and actually explained the process!!! if i have questions am i able to ask on here ?

    • @sidbrant
      @sidbrant  Před 2 lety

      I'm glad the video was helpful! Yes you can ask questions

    • @adamaris6118
      @adamaris6118 Před 2 lety

      @@sidbrant how did you go about doing the connectors/pressure switch? since they’re different how did you swap them

    • @adamaris6118
      @adamaris6118 Před 2 lety

      is it just like a screw on?

    • @sidbrant
      @sidbrant  Před 2 lety +1

      Yes it is, I used a wrench to remove the old one from the old piping and put it into the new piping

  • @homer4163
    @homer4163 Před měsícem

    Did you have to change anything on the evaporator inside the car? Other videos I've seen they changed the expansion valve inside the box.

  • @ezman3850
    @ezman3850 Před 6 měsíci +1

    Great video, super helpful. I am about to do this same swap. My only question is do I need to remove the existing evaporator in the dash or can I leave the existing one for my 91. Is it neccessary or helpful to use the new one from the new miata? Thanks for the help!!

    • @sidbrant
      @sidbrant  Před 3 měsíci

      Thank you! I had just put a new one in for a 90 so the 91 one should work fine

  • @dodge73dart
    @dodge73dart Před 2 lety +1

    Hey Sid
    Great video
    Where are you located in SC
    I’m near Greensboro/Charlotte NC and could possibly use your help?
    Thanks
    Richard
    I have my own home hobby shop with two lifts.

  • @dom.eberhardt
    @dom.eberhardt Před 2 lety +1

    I like the video! where did you get the Pressure gauge setup and the vaccuum pump?

    • @sidbrant
      @sidbrant  Před 2 lety

      Thank you! It all came from Harbor Freight

  • @ClassyRawToast
    @ClassyRawToast Před 3 měsíci

    Know im super late to this Video but hopefully you can still help me you. Im buying a system from a 95 miata, im assuming this is all the parts Ill need to take of the miata, are there any parts you installed off camera? Also did you drain your R12 system before switching to R134A? Just trying to see how to properly do it is all. If you had soke sort of Notes with the parts and steps thats be amazing!

  • @TFresh
    @TFresh Před 2 lety +2

    Thank you for this video! Is there any reason why you changed to 1994 and up ac system? Other than it actually being for r134

  • @Tuberiah
    @Tuberiah Před 2 lety +2

    How far off were the mounting holes for the condenser? Enough that you could open up the hole diameter and get them to align or were they way off?

    • @sidbrant
      @sidbrant  Před 2 lety

      It has bushing that you press into the holes. Unfortunately I doubt it's enough room for you to open them up to get it lined up.

  • @danbert4042
    @danbert4042 Před rokem +1

    Great vid! ? For you, do you add pag oil into the drier, or any other parts of the system outside of the compressor. I was told I need to drain the oil out of the compressor and add in 8.75 oz of pag 100 oil. Which ports do I drain / fill from? Last ? I got all 134 lines but the hi pressure line doesn't meet the drier. Can I reuse the old line that goes in front of the condenser from my r12 system?

    • @sidbrant
      @sidbrant  Před rokem

      I added the pag oil at the compressor. I belive I poured it into the hole on the side of it, and I rotated the pulley to make it suck in the oil. You should get a 134a condenser and drier also to make the 134a lines meet up.

  • @marmowedaw4021
    @marmowedaw4021 Před rokem +1

    I know this is a pretty old video, but how do i tell if my AC is still on the r12 system instead of the r134a? I got a Miata about a year ago and it finally out of refrigerat, and am trying to figure out if i should look into getting the whole AC system overhauled, or if its already good and just needs to be refilled.

    • @sidbrant
      @sidbrant  Před rokem +1

      I believe the A/C compressor had a sticker on it that said R-12 or R-134a

  • @humza5842
    @humza5842 Před 2 lety +2

    Yo quick question so I changed the fittings on the passenger side engine bay and add a conversion kit to it, I have a 1991, can I just slap in a r134a compressor in and it be fine?

    • @humza5842
      @humza5842 Před 2 lety

      @ 1:40 is where I added in the new fittings where you can screw some new caps on

    • @sidbrant
      @sidbrant  Před 2 lety +1

      It probably would work but it might leak the r134a past the old r12 seals after a while

    • @humza5842
      @humza5842 Před 2 lety

      @@sidbrant ah gotchu… thank you!

    • @humza5842
      @humza5842 Před 2 lety

      @@sidbrant I saw the ports on ur compressors are different, would my
      new r134 bolt in fine?

    • @sidbrant
      @sidbrant  Před 2 lety

      No they don't unfortunately, the sizes of the holes are different. You will need the r134a hoses, condenser, and hard pipes to make it all fit with the r134a compressor

  • @nanakupps07
    @nanakupps07 Před 2 lety +1

    Would you happen to have a list of all the parts and where you got them from? I definitely need to do this to my 90’.

    • @sidbrant
      @sidbrant  Před rokem

      I got all of the hard lines, hardware and compressor from a junkyard 1996 miata. I got the condenser, ac drier, evaporator and expansion valve from rockauto.com (all for a 1996 miata and I installed the evaporator and expansion valve before doing this video). The PAG 100 oil and r134a refrigerant came from Walmart.

    • @sidbrant
      @sidbrant  Před rokem

      Also got O-rings to seal the system from rockauto.com (1996 miata)

    • @michaelgarciamendoza9797
      @michaelgarciamendoza9797 Před 3 měsíci

      Question, I bought a 93 compressor from rock auto and says it takes r134a but the plugs are similar to the r12 connectors does that mean the r134a lines wouldn't fit my compressor?​@@sidbrant

  • @casinoroyalelover
    @casinoroyalelover Před rokem

    Hey Sid, what did you end up doing about the bracket on the new drier?
    I see that it's present during the comparison portion of the video, but not later when installing it.

    • @ipod16gb
      @ipod16gb Před 5 měsíci

      Did you ever figure it out?

    • @casinoroyalelover
      @casinoroyalelover Před měsícem

      I bought a drier that had a bracket on it, but it didn't fit the condenser. I cut off the bracket and used a section of silicone hose to pad the space in the condenser bracket because the driver was smaller than the R12 one

  • @justinstatham6378
    @justinstatham6378 Před 2 měsíci

    I have a 1990 as well. Could you not just replace the Compressor and leave the old lines?

    • @micahstein3523
      @micahstein3523 Před měsícem

      I have a 1990 I just left everything original. I recovered the r12 and charged it with r134a. 1.00 lbs of r12 requires 0.65 lbs or r134a

    • @micahstein3523
      @micahstein3523 Před měsícem

      I didn’t even change the oil. It still works

  • @kwilis2116
    @kwilis2116 Před 2 lety +1

    I should do this with my 91, right now it seems the old compressor was taken off completely but everything else is still present which is weird. Where'd you source your condenser from?

    • @sidbrant
      @sidbrant  Před 2 lety

      It came off of rockauto

    • @kwilis2116
      @kwilis2116 Před 2 lety

      @@sidbrant what year did you get? anything 94-97 i imagine

  • @ZareefHuq
    @ZareefHuq Před 2 lety +1

    How has it been working so far? I'm about to do the same to my 1991 with a system from a 1997. I don't plan on replacing the expansion valve and evaporator, is that fine?

    • @sidbrant
      @sidbrant  Před 2 lety

      It's working well, thank God! Not too long before I did the conversion I replaced those also, so I would advise changing those out also.

    • @ZareefHuq
      @ZareefHuq Před 2 lety

      @@sidbrant did you do it just in case or did you need them?

    • @sidbrant
      @sidbrant  Před 2 lety

      You need r134a o-rings on them to seal the system properly. It could leak if they aren't changed.

  • @stylze5767
    @stylze5767 Před rokem +1

    wait so why didnt using r134 in youre r12 system not work?

    • @sidbrant
      @sidbrant  Před rokem +1

      The seals in the compressor failed after a short while