Head gasket is leaking
Have you checked for Carbon Monoxide in the radiator coolant? If it's there, you have a leaking headgasket. The problem is, if your Nissan overheated for any reason, the head can warp and result in a leaky headgasket. Once that happens you'll never be able to keep it from overheating.
my 2001 ford windstar is still overheating even though i changed out the thermostat. what could it be?
check or replace thermostat
My 2001 Nissan frontier 3.3 v6 engine is overheating. I changed the thermostat but it still overheats.
A thermostat that is stuck in the closed position is a very common cause of overheating. A new thermostat should be installed every time the coolant is changed.
stop an engine
water pump. thermostat.
Check the thermostat first. I had an intermittent overheating problem on my 02 for almost a year, changed the thermostat and it never happened again. If that doesn't work, secondly I would check the water pump.
that is not a question
Either the water pump impeller is loose on it's shaft, or you have a leaking head gasket.
Sell It!!!!!
Purg The Air Out of the Cooling system