svx 1994 ac clutch problem

[danyvaly]

the ac clutch of the car is broken. the ac stills works and air comes cold but the clutch makes a squealing sound and tries to get stuck. the mechanic told me that i have to change the the whole unit... is it possible to change only the clutch since the compressor still works? and the car is 94 and seems is about time the clutch broke... or could have been broken because of overtighting... thanks for response...