Air conditioning conversion from R12 to 134A on my 92 4 runner

[@TSargeant]

Great video! I converted my 89 blazer from R12 to R134, only thing I did was change fittings and put I think it was about three small cans in it. The gauge stayed where it was supposed to. It would stay nice and cold for about three months then I’d need another can. Living in SC. It gets hot and it worked great for us. My compressor had the leak in it but I’d have to pay almost as much for the compressor as I would of for the blazer! It was cheaper to put a can in it every two/three months. Thanks for your video!

[@gravelyman]

Thank you and your welcome. You could have tried some sealer. Sometimes it works. Thanks for watching 🔧👍

[@JimConner]

Should you add PAG or Mineral/Ester oil and R134a. Was r12. Just replaced fittings. 1992 Pickup

[@gravelyman]

I don't remember if I added oil. I think I did but it's still working good after 4 years. Thanks for watching 🔧👍

[@marcosmolina8638]

Good stuff brother saved me 400$ bucks worked for my 1990 honda thanks👍

[@gravelyman]

Thank you very much and I'm glad the video helped you!!!

[@XxX-wl2dm]

Would this work on a 1994 Tacoma ?

[@gravelyman]

I don't see why not. I would think so. Good luck and Thanks for watching 🔧👍

[@PatrickMersinger]

I always heard that you gently turn the can sideways then pump.

[@gravelyman]

Yes true. Thanks for watching 👍

[@criis760]

I’m about to do this… so basically just remove all the r12 out of the system then install the fitting on the low pressure and recharge… seems pretty straightforward… no need to install a fitting on the high side right ? 😅

[@gravelyman]

Make sure there is no leaks in the system. Make sure the r12 is out and yes 134 fitting on the low side only. Do not over fill. Thanks for watching 👍

[@hasteandfury2424]

Your damn right it’s a bunch of crap... thanks for the vid, doing that on 1990 Toyota today.

[@gravelyman]

Your welcome, Thanks for watching!!!

[@RossWilliamsDC]

How did your 1990 Toyota conversion work out? I have a '90 Toy pickup I want to do it on.

[@gravelyman]

@@RossWilliamsDC it's been a little over a year now and it's still ice cold. Thanks for watching!!!

[@jeremylaws7010]

did you have to replace the drier with a different drier?

[@gravelyman]

No and it still works good. Thanks for watching 👍

[@metalhead719]

I’m gonna do this to my 1993 Camry. A local shop wants to charge me $196 to evacuate the r12 from the system. Anyway I can evacuate it myself?

[@gravelyman]

Not that I know of without the machine. I figured I would try it without evacuating the system. That was 2 or 3 years ago and it still works great. Thanks for watching 👍

[@metalhead719]

@@gravelyman thanks for the quick reply. So you didn’t evacuate the R12 in your 4Runner? You just put the new fitting on and then recharged it with R134?

[@gravelyman]

@@metalhead719 Yes it worked for me. And your welcome!

[@chickenlegman5460]

​@@metalhead719Did you end up evacuating the system? Did it work if you didn't?

[@Rose-A-Day]

Did you do it yourself? I have the same year Camry.

[@MarianoMorales19937]

Hello quick question if get all the r12 in it so what kind of oil i need to put back in it?? Thanks in advance

[@gravelyman]

Add mineral oil. Thank you for watching 👍

[@AlanNandez]

Use ester oil it’s compatible with r12 and r134a.

[@knock904]

how much oil did u use and what type

[@gravelyman]

U didn't add oil because the 134 oil doesn't mix well with the r12 mineral oil. Thanks for watching 🔧👍

[@charlesyii8963]

hows the AC holding ? any problem so far without the oil changed ?

[@gravelyman]

This is the second year and it's still cool. 57 degrees Fahrenheit. Thanks for watching 👍

[@malakamil9461]

Ok

[@SWFLJetSkiRiders]

Where did u get the fittings? Part number pls

[@gravelyman]

Advance auto. I'm sorry I don't have the part number but there is on one kind over by the freon. It comes with an assortment of fittings. Thanks for watching!!!

[@SWFLJetSkiRiders]

@@gravelyman Thank you, hows it holding, it's cold?

[@gravelyman]

It's still ice cold. It will be 2 years this coming spring. Thanks for watching 👍

[@SWFLJetSkiRiders]

@@gravelyman thanks for the video and info....

[@danbellamy6677]

"I am not one to read directions" That does not inspire lots of confidence in the information you are trying to provide. I was hoping to hear information like What is the difference between PAG oil and Ester oils, Operational differences between R12 vs R134a, pressure low side vs high side, efficiency differences, between R-12 and R134a. if the Pressures are higher, do we need to change out the high side limit switch, what about the low side limit switch. and what are those switches for and where are they? On a Orifice system do we need to, or is it better to change out the Orifice tube to get equal performance. Is it best to invert the can to dump liquid refrigerant straight in the system, or is it best practice to only introduce refrigerant as a vapor with the can upright. I have two systems to convert from R-12 to R134a, and I am seeking information. Could you help me with my questions?

[@gravelyman]

The best way to do it is to evacuate the system and make sure the system holds vacuum for at least an hour. Now you know you have no leaks. I suggest buying gauges. You will have to add PAG oil and when you refill it with refrigerant you will have to look up the specs for your vehicle. I never ran into problems with switches as you asked about. I know using 134a will take a lesser amount then the R12. I hope this helps you.