Question about 1995 Nissan Pathfinder

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Nissan path 95, boiling near to over heating

Nissan path 95, radiator boiling near to over heating. need to know if it is thermostat not opening that makes the engine over heat.

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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

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Posted on Jan 02, 2017

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Hi there I'm looking for some advice I have a Nissan pulsar 2000 no heat from the heater and car keeps overheating while driving I be flushed the radiator and heater core, replaced the thermostat


Crazy but have you put thermostat back in correct way? If so sounds like an air blockage. Fill radiator, leave cap off, put internal heater on hot and run engine until water is fully hot. Both top and bottom radiator hoses are hot. Sometimes therenis a bleed screw near the engine compartment bulkhead that needs opening to let trapped air out. If you have drained and refilled system and it only happened after that guarantee air lock. Good lick, let me know how you went plead.

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2000 triumph tt600 radiator cooling fan doesn't come on I've tested the fan and it works , all the wires to the fan look ok anyone any ideas


Yes, the thermostat. I don't know exactly where yours is - but the thermostat is usually on the engine near a radiator hose. When cool, it stays closed to heat the coolant in the engine block and keeping hot coolant in the radiator to be cooled. Once the engine has heated the coolant to 185 ~ 200 degrees, the thermostat opens and allows the hot coolant from the engine to enter the radiator - which forces the colder coolant out and into the engine block - to keep it from over heating.

Your thermostat may be stuck - keeping it from opening / opening fully. You can test it be removing it and dropping it into a pot of boiling water on your stove - it should open in water that hot.

Do not work on the thermostat, radiator or coolant while the engine is hot. Opening the cooling system may result in spilling coolant and making a mess if you are unprepared for it.

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Will the thermostat make your car run hot


an faulty thermostat will make the car boil but the water will normally go to the resevoir bottle. I be checking for burst radiator hose or cracked top tank before anything else. Thermostats are c;osed when the engine is cold and as the water heats up they open and allow water to pass through the radiator to cool. Coolant over the engine means boiling and escaping through an opening (hose,tank punctured radiator etc)

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My 95 Pathhfinder has started over heating, the coolant level is ok, and the water is moving. Have replaced radiator cap,and thermostat no help


OK, let's see, first, is it coolant or water? Coolant boils at 265 in a closed system, water boils at 220. Can you see any oil floating on top of water in radiator? Do you notice steam coming out the tail pipe at all? Is the radiator full of white rock looking stuff? Check the oil. And check all the above. If none of those symptoms show up, I would suspect just a clogged up radiator. A radiator shop can recore it or replace it. Hope this helps.

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Hi I have Altima2005 auto trans, it starts normal but after running 5 or 6 KMs it starts shivering (like misfire), i just replaced its sp plugs but didn't work... any suggestion?


does it show to be overheating?? sounds like it could possibly be overheating..check water in radiator and then thermostat located inside upper radiator hose where hose is mounted on front of motor.. take the thermostat out and put in near boiling water and see if you see it open up... if your thermostat is not opening, it will cause the car to over heat after driving for awhile and cause what you are describing..

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I have a 2000 nissan maxima and just recently i noticed it was running hot. so i took it to my mechanic and he advised i needed a new water pump. so he replaced the water pump and he is saying it is still...


hot engine usually due to clogged radiator or bad thermostat. Take out the thermostat and make sure it is opening fully in boiling water.
Look inside your radiator for signs of clogging. If yes, professionally flush or replace radiator.

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Over boiling problem while temperature guage remains normal.


Replace the thermostat. The Thermostat is not functioning correctly. It is closed = not allowing the radiator fluid to flow when the engine is cold. When the Thermostat reaches a certain temperature, it is suppose to open = allowing the radiator fluid to flow.
Your Thermostat is not opening, causing the engine fluid to reach boiling point. When this happens, the sheer pressure will 'blow' boiling radiator fluid out the radiator cap. The Radiator Cap is designed to do this if operating properly.
Change that Thermostat and the over boiling should disappear. And yes it is something you can do yourself without much problem.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!
Please include your engine size on any additional information or questions..Thanks,

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Most likely the thermostat. The heater bypasses the thermostat. If the thermostat is blocked the only cooling is via the heater matrix. To check start the engine with the heater off and put your hand on the thermostat housing when the thermostat opens you should feel the housing get hot. If it doesn't the thermostat is faulty.

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try taking out the thermostat it might be bad and not opening. hope it helps

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