So a couple of months ago I was getting a horrible grinding noise when I turned on the AC. I didn't think the problem needed any further diagnosing, I just went straight for AC compressor. Well I just recently changed it with a brand new unit, and the problem still exists, a terribly loud grinding noise while the AC is on. Now it's only there when you turn on the AC, as soon as it's off everything sounds just fine. So I'm thinking to myself there's no way this brand new compressor I installed is bad too! I did a full flush, filled her up, and it blows ice cold.
Any ideas on what else it could be? Again, when the AC is off, all the other accessories and pulley's sound 100%, no squeaks anywhere. With it on, the noise is there, but it almost sounds like it may not even be coming from the AC compressor, it's hard to pin point with all the engine noise. Almost sounds like it's on the drivers side, maybe the alternator? Is it possible that when the AC is on it puts a strain on the serpentine system and is causing something else to produce the noise? What do you guys think?
Oh ya, my truck is a 1994 K1500, TBI 350 with a whipple supercharger.
Any ideas on what else it could be? Again, when the AC is off, all the other accessories and pulley's sound 100%, no squeaks anywhere. With it on, the noise is there, but it almost sounds like it may not even be coming from the AC compressor, it's hard to pin point with all the engine noise. Almost sounds like it's on the drivers side, maybe the alternator? Is it possible that when the AC is on it puts a strain on the serpentine system and is causing something else to produce the noise? What do you guys think?
Oh ya, my truck is a 1994 K1500, TBI 350 with a whipple supercharger.