pinging sound coming from the pulley mounted to water pump.

THANKS GREGS AUTO, I WAS THINKING THAT,, JUST NEEDED SECOND OPINION SO NOW I CAN GET BUSY AND DO IT. Its got 260,000 miles on what I know is the original pump and pully.Still runs strong though :AGAIN THANKS KINDLY FOR ALL YOUR HELP WITH SEVERAL OF MY POSTS:: RYEDOC. PRINCETON MN. One more question, If replacing pump should I replace serpintine belt @ same time?

If u think u will have to do it soon.also thermostat and also use dealer parts only on the water pump and thermostat