86 silverado air cond upgrade. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Greasey Harley · 12-17-2019, 01:55 AM

I work for a refrigeration company. Our shop truck is a '79 C30 with a 454 and original AC still in place. I went through the system, replaced all the O-rings and both rubber hoses.
Pressure tested it over night, then pulled a vacuum on it with our big Appion vac pump. After it achieved a nice, deep vacuum (500 Microns), I installed the proper amount of R-12 back into the system.
That thing will FREEZE YOU OUT! Even when it's triple digit temps, it's always cool in The Dually. The point being, there is nothing wrong with the design of the factory AC, and parts are still available.

My opinion is worth exactly what you are paying me for it.
-Russ

12-17-2019, 01:55 AM	#7
Greasey Harley Registered User Join Date: May 2013 Location: Post Falls, ID Posts: 903	Re: 86 silverado air cond upgrade. I work for a refrigeration company. Our shop truck is a '79 C30 with a 454 and original AC still in place. I went through the system, replaced all the O-rings and both rubber hoses. Pressure tested it over night, then pulled a vacuum on it with our big Appion vac pump. After it achieved a nice, deep vacuum (500 Microns), I installed the proper amount of R-12 back into the system. That thing will FREEZE YOU OUT! Even when it's triple digit temps, it's always cool in The Dually. The point being, there is nothing wrong with the design of the factory AC, and parts are still available. My opinion is worth exactly what you are paying me for it. -Russ



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