Weird Sound Coming off my Engine

[JDM_EK4_HB]

I have this problem, a noise(tok tok tok) coming out from my engine if I turn on the aircon but if i switch it off, noise is gone. And also if I step on the clutch w/ aircon on the noise will stop.

What could be the problem? TIA

 

[tama666]

Have you checked your AC belt?

 

[mattks ek4]

the noise could be cause by the extra load on ur alternator from ur air con/ auxillarlys.realy just get rid of the air con its taking performance off the engine enyway. my ek4 does it when i operate the rear heated windscreen.

 

[pajm85]

Could be the ac pulley bearing...