My g/f still has the 98 xj ive been sinking money into for some reason and this time i hear loud noise coming from pass. side front of the engine bay, mostly at an idle. Anyways, i turn on the a.c or defroster....looking at the compressor i see the clutch kick in, when it starts the noise goes away, when it stops, the noise comes back, its almost like bad bearings or something. Is this a mandatory fix? Can i replace just the clutch part of the compressor if possible or should i just get a whole new compressor? Thanks for any info...searched but all i found w/ stuff about a.c just not working.