AC compressor chatter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Cesar Diaz · 08-20-2021, 02:28 PM

I replaced a 1 year old AC compressor on my 72 c10 added the required PAG 46 oil, pulled a vacuum, verified no leaks, drew a vacuum for 1.5 hours more then added R134, at one point my scale got stuck and I ended up adding about a 1/2 lb more of R134 then I should have.

While loading the R134 all went smoothly. when I went to drive the care with the AC on it started squealing loudly so i shut off the AC and when I got home checked and the Compressor is intermittently locking up.

Could it just be that the compressor is bad or is the extra R134 the issue?

08-20-2021, 02:28 PM	#1
Cesar Diaz Registered User Join Date: Jun 2016 Location: Stevenson Ranch, CA Posts: 62	AC compressor chatter I replaced a 1 year old AC compressor on my 72 c10 added the required PAG 46 oil, pulled a vacuum, verified no leaks, drew a vacuum for 1.5 hours more then added R134, at one point my scale got stuck and I ended up adding about a 1/2 lb more of R134 then I should have. While loading the R134 all went smoothly. when I went to drive the care with the AC on it started squealing loudly so i shut off the AC and when I got home checked and the Compressor is intermittently locking up. Could it just be that the compressor is bad or is the extra R134 the issue? __________________ Cesar Diaz 1972 C10 Big Block 402 Cheyenne



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