Loud noise from engine when I start. Water pump? on 1997 Chevrolet Camaro

97 camro. 84k runs greay. 1 week ago loud choking noise from engine. Gas station told me water he correct.

Asked by for the 1997 Chevrolet Camaro
possibly. best to get a technician to get a hands on look at it. if odd temp. flux. from engine it prob. is.
On a second look someone told me it is the bearings in the alternator that are making the noise. How much do they cost for repair and also serpantinebelt. Thanks
serp. belt $25.00(rec. goodyear gatorgrip), alternator $250.00, time 2hr.s. labour depends on shop. get tech. to inspect first.