I am getting pretty bent over a ac compressor squeal that I am fighting with. :rant2::rant2::rant2::rant2::rant2::rant2::rant2:
I have the LT1, and factory mech fan. With it disconnected, no change. AC on, it squeals like crazy, but once it gets up to speed, it is fine and stays fine for hours on end. Shut off the engine and let it sit for a min, and back to squealing... But when I get over 50% throttle, I have AC set to shut off, and I never get a squeal when that turns it on/off.
Ok, so, what have I done? Replaced belt tensioner, replaced belt 2x (gatorback belt and el cheapo belt, second one (el cheapo) is slightly smaller) and the smaller belt helps, some. Tensioner made no difference.
So, the squeal is the compressor itself stalling. If it is on and quiet, and I am stopped, and turn the wheel, the additional load on the belt from the PS will cause it to squeal (again, stopping the compressor pulley).
The only thing left I can think of is the AC possibly overpressurized. It was perfect as per GM charts last year as well as by weight when sucked it all down and put new R134a in. But can overpressurization cause too much AC compressor loading?
Is there something else that might be causing this? What might cause the compressor to have too much load that the belt can't handle it? It doesn't feel like there is excessive compressor load, at least on the gas pedal....Unless, of course, the belt is squealing and stalling the compressor, then it is loaded pretty good.
I have the LT1, and factory mech fan. With it disconnected, no change. AC on, it squeals like crazy, but once it gets up to speed, it is fine and stays fine for hours on end. Shut off the engine and let it sit for a min, and back to squealing... But when I get over 50% throttle, I have AC set to shut off, and I never get a squeal when that turns it on/off.
Ok, so, what have I done? Replaced belt tensioner, replaced belt 2x (gatorback belt and el cheapo belt, second one (el cheapo) is slightly smaller) and the smaller belt helps, some. Tensioner made no difference.
So, the squeal is the compressor itself stalling. If it is on and quiet, and I am stopped, and turn the wheel, the additional load on the belt from the PS will cause it to squeal (again, stopping the compressor pulley).
The only thing left I can think of is the AC possibly overpressurized. It was perfect as per GM charts last year as well as by weight when sucked it all down and put new R134a in. But can overpressurization cause too much AC compressor loading?
Is there something else that might be causing this? What might cause the compressor to have too much load that the belt can't handle it? It doesn't feel like there is excessive compressor load, at least on the gas pedal....Unless, of course, the belt is squealing and stalling the compressor, then it is loaded pretty good.