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With the cooler weather coming in, I've noticed it start cycling, and it does seem set a little high - you can tell the AC wants to cool down a little bit more before it switches off. I'll be fixing that one of these days...

Great perspective and info, thank you very much! I'll be monitoring temps and listening to hear it cycle as it gets cooler. I must say, when you're wife comes back from errands saying the AC is too cold, it puts a smile on you're face! Thanks again for all the expert advise and guidance! God...

Ah, OK, makes sense on the orifice - might try the Ford Red (.62") tube if I ever take it apart again. On the low cut off pressure you mention, I'm curious here because the low side never gets so low that it kicks the compressor off - at least when at idle or stopped at a light. Maybe it does...

Thanks for the reply Ferm, I really appreciate it! I ended up going back to using a new TXV correct for that vehicle, and took the coiled probe and mounted on the evaporator outlet manifold, in a vertical orientation with the probe pointing down as required. I used two pipe clamps to get it...

OK @THEFERMANATOR, another question for you. In the past you mention changing out the TXV to the newer style - I bought one for a 96 suburban and discovered the threaded fittings are not the same - this is true for 94 and up till at least 99. Also the capillary tube/probe doesn't have the coil...

Awesome @THEFERMANATOR - thanks so much for chiming in. I am going with the .062" and will let y'all know how it worked out.

Honestly, I'm leaning on the side of the .067", to be the nicest I can be to the R4. Someone tell me I'm being way too OCD and need to just throw a .062" in it like good ol' @THEFERMANATOR recommends!

Is @WarWagon still around? Still trying to decide on a final word on .067' (blue) vs .062 (red) to use in a square body suburban with rear AC. I hear higher head pressures on the R4 compressors are at least something to keep in mind if going all the way down to .062", but otherwise gives...

Thanks, good info and will think on it!

Thanks Will L. - bummer I already painted the condenser. I have not been in contact with him, just read his posts in various threads on the subject. I'm hoping he'll chime in here! His latest post recommends the .062 but has recommended the .067 previously, so being my first time with this and...

Hi there, Seeing various answers regarding the orifice tube size recommended for the older squarebody suburbans with rear AC when doing a R134a conversion. I purchased a .067" but haven't installed yet and am seeing @THEFERMANATOR, who I greatly respect, now recommend a .062". Is it worth...