Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I can’t find the chart I am used to working off of. Grabbed this at random from google search.
verify this chart by comparison to a few others (online stuff often wrong) and make sure they are on the refrigerant you are running. This is for 134a.
You have an operational problem like low refrigeration amount, and possibly something else going on. Solve the issues first. Then later when you want the 134a to perform like the r12 did, get a new condenser and evaporators... ship them to Twisted Steel Performance for TLTD coating. The coatings will improve the efficiency by 30%, which btw is the variance between 134a and r12. Providing the rest of your system is correct it will cool to the same temp r12 used to.
You said you just bought new radiator iirc (i might be thinking someone else). remove it, rinsed out and ship to him at same time to improve its performance as well. Just too bad you didn’t come here before installing the new parts or would have told you then. Worth the effort long term imo.
The orifice goes in the evap, it cannot go in the condenser in a square body.The accumulator temp isn't as important as the evaporator line going into it esp. at idle. Is this line also warm?
Your system acts like there is a clog in the front evaporator circuit. I have heard of internally corroded evaporators, but, never seen one. The 105 degree reference is for the VOV's I love, but, have found some to be 100% defective from the factory: plugged solid. Charged the system and the low side went to 35 PSI, cut off and never changed. Show's over, period. That was a front AC system only. I have run the regular $1.99 orface tubes since.
May have to try and see if you can blow something through the front system with the orface tube removed. Compressed air, coughrefrigerentcough, dry nitrogen, whatever.
Where is the front orface tube exactally in the system? Possible you may have two by mistake in the system like inlet of evaporator and outlet of condenser. New condensers ship with them installed sometimes. This will ruin your day if there is also one in the evaporator.
PNo, front valve. Rear system is working means rear system is fine.
I can’t find the chart I am used to working off of. Grabbed this at random from google search.
verify this chart by comparison to a few others (online stuff often wrong) and make sure they are on the refrigerant you are running. This is for 134a.
You have an operational problem like low refrigeration amount, and possibly something else going on. Solve the issues first. Then later when you want the 134a to perform like the r12 did, get a new condenser and evaporators... ship them to Twisted Steel Performance for TLTD coating. The coatings will improve the efficiency by 30%, which btw is the variance between 134a and r12. Providing the rest of your system is correct it will cool to the same temp r12 used to.
You said you just bought new radiator iirc (i might be thinking someone else). remove it, rinsed out and ship to him at same time to improve its performance as well. Just too bad you didn’t come here before installing the new parts or would have told you then. Worth the effort long term imo.
C/o parts is not a problem, this is my retireme nt truck, I don't think I mentioned it there are not very many old parts left on this truck, bumper to bumper I think the steering box is yet to be changed but not much more. Everything i found online said 72 ounces of r 12, so i put in 60 ounces. Pulled out 134, will replace txv, had floating high side pressures220 to 125, will get a new orifice spec for 86 burb w/rear air 134a not high ambient. Let ya know, it will be a few days. JimJust looked up the factory charge amount for a dual air square body 85+ Burb and it was 96 ounces(6 lbs) of R12. If you still have the stock condenser, assuming the customary 80% charge rule, 60 ounces would be quite a bit under charged as it would hold 77 ounces. If you put in a parallel flow condenser, going off the reduction in charge I experienced, you would need 70 ounces to charge it. You can see how what was replaced and what wasn't can effect things.
Should be 13 ounces I believe for a dual air square body. Problem is the R4 I believe only like pag 150, and pag 150 is not good for performance. Pag 46 works much better and doesn't liquid slug as badly, it stays more fluid in the lines instead of getting caught in the evap or suction line when it gets cold. I believe this is why GM superceded most compressors from pag 150 to pag 46 around 05.Should ask on oil amount as well.