Question about 2006 Nissan Pathfinder
If it gets hot running down the road,30 mph or better,the fan is not at fault.The fan only keeps it cool at low speed,when there is no airflow. If you take the rad cap off ,truck cold,and watch the water,if you see bubbles,almost like carbonation bubbles,a head gasket would be suspect.
Posted on Dec 26, 2013
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Posted on Jan 02, 2017
Simple thing to test first would be to pressure check the radiator cap. Next would be to check for combustion gases in the radiator indicating a leaking head gasket. It is an aluminum head and iron block engine and there is a possibility that antifreeze anti corrosionpackage runs out due to over age then fails due to too long in the engine it results in galvanic corrosion at the head gasket-commonly resulting in a failed head gasket. There are other engines that are vastly more prone to this than the maxima engine. If there is a leaking head gasket the gases could rise to the top of the system and block the water flow into the heater. Listen for gurgling sound in the heater.
Posted on Feb 10, 2009
It certainly can cause the condition, but so can TONS of other items: coolant level, bubbles in the coolant (air bleeds), reaiator restrictions.
You could test the thermostat, pull it and put into measured temprature water and observe it as you raise the temprature...
Posted on May 30, 2010
have radiator checked for flow . you can remove the radiator cap when cold and start up the truck and look inside radiator. you should be able to see coolant flowing thru the coils. if not you may need to have radiator cleaned by a shop or buy a new one.also check your fan
Posted on Sep 04, 2010
make sure system is well bled of air. Open radiator cap and start engine. Run until hot and thermostat is open (coolant flowing in radiator. Keep radiator full and also open any bleeder ports on thermostat housing or in hoses until no air comes out.
Posted on Sep 26, 2010
SOURCE: i have put new water
A clogged catalytic converter or a restricted exhaust will cause over heating. Also a cracked head or bad gasket. Also, if your engine timing is very far off it will overheat. Make sure you have all the air out of your cooling system and it is actually running hot, not just your gauge showing it's hot.
I hope this helps.
Posted on Jul 02, 2011
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