Hi

This morning, started the car and had this metallic rattling sound, which was coming from the front N/S pulley area of the engine.

Could see the tensioner pulley flapping about, but this has just been changed with the aux belt too.

altenator clutch pulley tested ok, could this be the air con pump? noise only comes on idle load, but soon as the engine is sped up, noise goes away.

Any pointer pls?

Chet.