"kis-kis" sound on sanden compressor

[revoGSX]

Hi guys,

help naman po, yung sanden compressor meron tunog na parang nagki-kiskisang metal, aka "kis-kis-kis-kis" , mukhang sa magnetic clutch yung problem

pag nag-engage na yung magnetic clutch eh wala na yung sound, pero once na malamig na eh mag-stop na yung magnetic clutch at ayun na naman yung tunog.

so far malamig pa naman yung aircon at walang bubbles sa small glass window sa engine compartment.

sa casa eh gusto palitan yung compressor pero ayaw ko kasi mukhang sa magnetic clutch lang and wala daw nabibili na magnetic clutch for sanden.... is this true?

revo GL diesel 2000 model po yung car

ano recommended shops? thanks