Strange engine sound need help

[Lou C]

Hi guys!
are we sure it cannot be the generator? cuz its only loading 12,4 volts~

no wobble on the pulleys exept maybe the water pump pulley but i think its normal that it "moves" little bit due to engine vibration? i dont think its the pulley i think its the engine moving it. if u look on the "cooling" hose

Your alternator should put out approx 14.2 volts, so I'd check all the connections first including battery, starter, etc to make sure all are clean and not corroded.

 

[Lou C]

changed the belt and sound is gone gonna replace the rusted pulley anyway thx all /Anders

Is the belt running straight and true? If so great, good outcome!