Squeaky AC Compressor Noise

[George B]

It could still be the belt. Mine is a stretch to fit and started making an awful screeching when the ac kicked on. In the process of trying to find the issue I sprayed the belt with brakeclean and made it 100 times worse. I used some spray graphite to temporarily quiet it down until I could get a new belt and the tool to remove and install it. No more noise now.

 

[TahoeLT10]

It could still be the belt. Mine is a stretch to fit and started making an awful screeching when the ac kicked on. In the process of trying to find the issue I sprayed the belt with brakeclean and made it 100 times worse. I used some spray graphite to temporarily quiet it down until I could get a new belt and the tool to remove and install it. No more noise now.

So the noise is gone after replacing the belt? Good to know as I will try it first before doing the AC compressor. Waiting for weather to warm up.

 

[George B]

So the noise is gone after replacing the belt? Good to know as I will try it first before doing the AC compressor. Waiting for weather to warm up.

Yes. My belt was not slipping but was worn and pulling down too far into the pulley. The edges of the back were rubbing the sides of the outside grooves and making noise. Took me 10 minutes tp change using the Lisle brand belt tool.

 

[TahoeLT10]

Thanks for all the help, gents. The AC is on my low priority list right now as it is still cold outside and it still works. The vehicle is taken apart currently in and out as I am working on many small(er) issues now with main one being transfer case swap due to stretched chain. Just ran tech2win scan and shit ton of codes popped up (nothing is lit in the dash). Kind of scared me but after doing some reading is seems that is it due many components currently being off the vehicle (side mirror, pillars, dome light module, stereo, etc) and it is crazy that all is interconnected.

 

[TahoeLT10]

Sprayed some wd40 onto the pulley/clutch and it seems to temporarily quite the noise down. May be will attempt to just change the clutch if all possible.