A/C Noise--little help please

[josharre2000]

Got a strange noise coming from my AC compressor. I have replaced the idler pulley and belt. I have not replaced the A/C clutch. Rig has 129k on it.

The noise sounds like a hollow hiss/whine. The noise reduces significantly when I engage the A/C. I consulted my FSM and the sight glass looks to be in spec. The A/C unit cools very well and removes condensation/fog from the inside of the glass very well (its drying the air well).

Any ideas what my issue is?



thanks,

josh

 

[Koffer]

Mine does this too and Ive done the same as you with a new belt and idler pulley . Im pretty sure its the clutch but for the work of replaceing it I'm just going to put a remaned or new compressor on it since I have a great feeling that it will s*** the bed as soon as I replace the clutch