Hi all, I have an 86 5ks and the A/C compressor is making a weird humming noise, it rises and falls in pitch with the rpm of the engine. My mechanic told me it's about to leave this world for another (??) Any way I'm just wondering if this is true, and if any one has had experience with this. thanks -Obin 17 86 5ks 112kmi...scared my compressors going out!!