water pump on 1999 Nissan Quest

my van is over heating so i figured it was my thermostat so i changed it but it still over heats. is it the water pump and if so what steps do i take to remove the old one and replace it with a new one?

by in Hialeah, FL on March 11, 2011
1 answer
ANSWER by , March 11, 2011
If system is full then could be water pump if the impeller is bad and not moving coolant thru system. May also be clogged radiator or a/c condensor not allowing air flow, could be radiator not flowing, can find out if use infrared temp gun to check for large temp differences at the radiator core, good luck.