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!

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 KZread doing work on the Miata and I'm super impressed and subscribed right away.

@sidbrant

2 жыл бұрын

I appreciate it man! Glad the video helped

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

Жыл бұрын

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

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

Жыл бұрын

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

Жыл бұрын

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

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

@sidbrant

Жыл бұрын

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

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.

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

@sidbrant

2 жыл бұрын

Thank you! It all came from Harbor Freight

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

2 жыл бұрын

It seems to be the same to me

@sidbrant

2 жыл бұрын

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

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

2 жыл бұрын

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

@adamaris6118

2 жыл бұрын

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

@adamaris6118

2 жыл бұрын

is it just like a screw on?

@sidbrant

2 жыл бұрын

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

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

Жыл бұрын

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

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.

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!

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

2 ай бұрын

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

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

@sidbrant

2 жыл бұрын

No that's the only reason

@sidbrant

2 жыл бұрын

And you're welcome!

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

Жыл бұрын

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.

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

2 жыл бұрын

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.

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

Жыл бұрын

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

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

4 ай бұрын

Did you ever figure it out?

@casinoroyalelover

27 күн бұрын

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

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

Жыл бұрын

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

Жыл бұрын

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

@michaelgarciamendoza9797

2 ай бұрын

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

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

2 жыл бұрын

It came off of rockauto

@kwilis2116

2 жыл бұрын

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

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

2 жыл бұрын

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

2 жыл бұрын

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

@sidbrant

2 жыл бұрын

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

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

2 жыл бұрын

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

@sidbrant

2 жыл бұрын

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

@humza5842

2 жыл бұрын

@@sidbrant ah gotchu… thank you!

@humza5842

2 жыл бұрын

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

@sidbrant

2 жыл бұрын

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

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

@micahstein3523

24 күн бұрын

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

24 күн бұрын

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

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

@sidbrant

Жыл бұрын

The seals in the compressor failed after a short while