LX 470 GROWLING
 

I HAVE BOUGHT A 2000 LX470 W/IN THE YEAR.
THE PAST COUPLE OF MONTHS I HAVE NOTICED THE CAR MAKING A GROWLING NOISE,COMING FROM THE AREA OF THE FAN CLUTCH
OR WATER PUMP AREA-NOT SURE.
THIS HAPPENS DURING WARM UP OF THE CAR-NOT UNTIL THE THERMOSTAT SEEMS TO OPEN- AND ALSO WHILE DRIVING--WHEN A LOAD IS PUT ON MOTOR--2500 RPM DURING ACCELERATION

PLEASE HELP TROUBLESHOOT.