Trying my best to figure out a problem with my Dads 98 4x4 Tacoma.
Weird noise when the AC isn't engaged. Still there when AC is ON but not as loud. Here is what we've done so far.
New AC idler pulley
New AC clutch bearing
Any ideas? I have done all I can think to do. It almost sounds now like its coming from the crank area. Could it be a bad water pump? It runs and drives fine but its so loud that it almost sounds like diesel. Does it at idle and all RPMs but is much less when AC is ON. When the AC belt is removed it is also gone. So maybe its the AC compressor? But why would it do it more when off? This is why i changed the AC clutch bearing. Please help.