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**CUSTOM/10** · 03-17-2015, 12:58 PM

Lots of good info here !!!

OK, I'm an HVAC Tech but just don't have much experience with automotive A/C. I did some research on other forums and there's more than one way to do the conversion. The following is the approach I'm going to take partly because I'm doing a ground up resto-mod and I have a new sanden compressor.

* New Sanden Compressor
* New condenser coil ( Parallel flow for R134A )
* New drier
* New custom lines set
* Adjust the original POA valve to 26.5 PSI
* I already have electric fans with a controler that brings on the fans for the A/C.
* Replace all o-rings
* Flush the system
* Add the proper amount of PAG oil
* Re-use the remainder of the original system.
* Evacuate and charge the system to 75-85% of the original charge

At least this is what I'm thinking at this point.

Gary

03-17-2015, 12:58 PM	#15
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,796	Re: Converting factory AC to use R134a Lots of good info here !!! OK, I'm an HVAC Tech but just don't have much experience with automotive A/C. I did some research on other forums and there's more than one way to do the conversion. The following is the approach I'm going to take partly because I'm doing a ground up resto-mod and I have a new sanden compressor. * New Sanden Compressor * New condenser coil ( Parallel flow for R134A ) * New drier * New custom lines set * Adjust the original POA valve to 26.5 PSI * I already have electric fans with a controler that brings on the fans for the A/C. * Replace all o-rings * Flush the system * Add the proper amount of PAG oil * Re-use the remainder of the original system. * Evacuate and charge the system to 75-85% of the original charge At least this is what I'm thinking at this point. Gary __________________ Gary 72 SWB 4x4 My 72 SWB Build http://67-72chevytrucks.com/vboard/s...d.php?t=259859 Last edited by CUSTOM/10; 03-17-2015 at 01:03 PM.