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Recharge AC System
#1
All,

I have a 1973 Grandé Coupe with AC. Lately the compressor sounds like it is struggling to work. My system has been converted to R-134a. The AC is still blowing pretty cold. I did some reading in the shop manual and some “google” research and I think the compressor may need oil. I’m searching for oil that I can put in and there are different viscosities available. I see Interdynamics R-134a PAG 46 w/ICE 32 Oil Charge (3 oz.) which is listed as a low-viscosity oil, and Interdynamics R-134a PAG 150 w/ICE Oil Charge (3 oz.) which is listed as a high-viscosity oil. Which one should be used in our cars? Thanks…

http://shop.advanceautoparts.com/p/inter...oil+charge

http://shop.advanceautoparts.com/p/inter...oil+charge

[Image: 1_24_09_13_4_29_06.png]
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#2
The thinner appears to extend compressor life. I just happened to have put that in a friends driver car last week. It quieted his compressor immediately. I'd use it again. Was pleased with it.
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#3
(07-02-2014, 06:32 PM)judge Wrote: The thinner appears to extend compressor life. I just happened to have put that in a friends driver car last week. It quieted his compressor immediately. I'd use it again. Was pleased with it.
Thanks judge...

I also found this one after a little more looking. It seems to have have everything I need.

http://www.autozone.com/autozone/accesso...33038_0_0_

[Image: 1_24_09_13_4_29_06.png]
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#4
I noticed when I was buying that some brands had more or less oil than others. Also some have sealers added, Also in differing quantities. Just read the contents carefully.
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