that_wrxlife

I have a MY02 WRX, and I have a belt squeek, one of the pulleys (pictured below) has three black bits protruding from the pulley, should this bit spin??? If not then how do I stop it from doing so?

TIA

Don Clark

Yes, its the magnetic clutch on the A/C compressor so will spin when engaged by the A/C system/ecu

Shortest video i could find so show engagement - when centre spins clutch is engaged

that_wrxlife

In that case, what does it mean when it only spins sometimes?

JDM_Stig

iTrader: (3)

Being fair the AC belt tensioner pulley is a common area of trouble, mine used to squeak lol.

that_wrxlife

Thanks guys, now I know it's supposed to spin I pulled my head out my ***, tightened the belt and all squealing has stioped

Don Clark

It only engages/runs when necessary, although if it keeps stopping/starting its a possible sign of low gas in the system.