Engine Size: 350
Refrigerant Type: R-12
Country of Origin: United States
This is a new system. I'v replaced the evaporator, condenser, accumulator, hoses, and compressor. I'm using a Sanden SD5H14, ... and sticking with R-12, since I already have an ample supply. And of course, using mineral oil. These hoses might be a bit longer than OEM's, because of how they were routed. According to my 1980 GMC Light Duty Trucks service manual, ....total system oil required is 6 fluid ounces. I'll drain the PAG oil from the new Sanden, and replace that amount with mineral oil, after flushing it with mineral oil. Doing that, along with adding 3 ounces to the evaporator and 1 ounce to the condenser, is my plan. System will be properly evacuated and charged by weight, .... which is 3 lbs 12 ounces, as noted in the manual. Do the oil amounts / locations sound right? Have I overlooked anything here? Any suggestions or corrections to this scenario is appreciated. Thanks
I always put all the required system oil in the compressor- just as it was done when the car was first started on the assembly line. Why fool around trying to fill different parts..?
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
Putting all the oil in the compressor may have one issue that I found out. Oil was add and ports were plugged to allow the install without losing the oil. The position of the ports after it was bolted in allowed oil to leak out when the plug were removed. That may work but not in all vehicles.
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