Question about 2000 Nissan Frontier

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Why would my truck continue to run hot?

I have replaced radiator, water pump and several thermostats. Unable to stop my truck from heating up.

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  • Master
  • 750 Answers

You may have a cracked cylinder head or your ignition timing may be off, Also check for drive train bind up (brakes,bearings,transmission)

Posted on May 30, 2014

  • damon monroe
    damon monroe May 30, 2014

    check the water flow from the water pump into the engine and the water flow uot of the engine to the water pumps. It sounds like a cloged hose I also seen this where the heater will not work,

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Have you checked the operation of the electric fans? If they are not turning on at the right time, the engine will overheat.

Posted on Jun 11, 2014

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 518 Answers

SOURCE: Nissan Sentra 2001 - Overheating but no hot air

It could be just air in the system, or it could be the heater matrix just by your feet, fitted central dash, check to see if the two water pipes that go into the car from the engine compartment are hot if there is only one that is then thats your problem, but if they are both cold the problem is more to do with where the water is coming from, please let me know how you get on

Posted on Jan 04, 2010

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SOURCE: 1995 Nissan Maxima Over heating, no heat blowing, water not moving

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

davidkay61
  • 23 Answers

SOURCE: running hot

Radiator Fan Control Relay Switch. I bet your electric fan doesn't run?

Posted on Dec 01, 2008

  • 1 Answer

SOURCE: no heat replaced thermostat water pump and

when you changed the therm you let air into the system and it will usually cause a air bubble in the heater core you probally should try to burp the system there is usually a plug or a relief valve check with your dealer fro instructions on how to burp the air out of the system try that first befor4e trying to replace the heater core

Posted on Jan 15, 2010

tiresmoke
  • 68 Answers

SOURCE: engine running hot and the water in the radiator

Hello, im sure being a mechanic you know to check the weep whole on the water pump for leakage. The thermostat is a possibility, could be stuck closed. The impellers on the water pump begining to fail. Hope this was helpful

Posted on Apr 07, 2010

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1 Answer

How do I stop my 01 explorer from 0ver heating. I already replaced water pump thermostat and radiator


Since you have done the basics, more information is needed. Under what conditions does it overheat, and how severely? Only when at idle for several minutes? Could be bad fan clutch or missing/damaged fan shroud. Severely overheats so bad you can't drive it at all? Blown head gasket? You can often diagnosis this by running with radiator cap removed and see bubbles in the radiator, or also look for water in oil, or oil in the coolant. Also, check with parts store. I think certain years of these run a reverse direction water pump, and if you get the wrong one they will overheat badly.

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Hi Kim,

I can feel your frustration. It sounds like you've done all the logical stuff already. The "donut hole" in your process would seem to be not changing the water pump. The water pump as you might imagine, is responsible for circulating (pumping) the relatively cool water in the radiator into the running engine that contains the hot water. Hoses connect the two together. A thermostat is between the radiator and the engine. Once the water in the running engine gets to a certain temperature, the thermostat opens allowing the water pump to send cool water into the engine and hot water out to the radiator to be cooled. The heater core is usually on the passenger side firewall area.

It sounds like the water pump is the only thing left to change - if it isn't working - it can't circulate the water - and will result in overheating. Lastly, a clogged heater core shouldn't cause the engine to overheat - in fact, if the engine begins to overheat, you should turn the heat to HIGH fan and HIGH temperature to help remove some of the heat in the coolant.

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1996 nissan altima no cabin heat, new radiator, flushed and filled, top hose hot, lower hose cold, newer thermostat checked good


HI Anon.
Remove your radiator cap (WHEN ENGINE IS COLD), run the motor and let it warm up a minute or two, have someone rev the engine a little while looking into the radiator. If the water goes down and/or you see the water moving, your water pump is good. If not this means that your water pump is bad and is not moving enough water through the system. Try Removing your thermostat and run the engine without it. Keep checking the radiator hoses to see if they are the same temperature. If they are not the same temperature the water pump is bad. If they are the same temperature your thermostat is more than likely the culprit. Hope this helps.

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Why is my coolant overflowing when my 2006 Chevy equinox heats up?


thet moment stop your engine and grab top radiator hose, feel the heat then grab lower radiator hose they have to be hot same heat. Top hose very hot is radiator blockage, Or lower hose very hot thermostat damage ,for test thermostat tide whith a string or wire have one glass cold water and juck boiling water deep thermostat in and you have to see the opening if is not then you have to replace it. Don ever youse radiator flush with the thermostat on. Blown head gasket means continual air bubble when you remove radiator cap special white froth,check for loose or damage hose and heter leaks when cooling system is under pressure.check low and high rpm exhaust fumes.

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Drained radiator added prestone Radiator flush refilled and started overheating, drained radiator replaced thermostat and now I get no heat from heater,Radiator water is hot


disconnect the heat hoses going into fire wall , put hose into one with pressure and flush as it sounds like it could be bloked in the heater core,the other thing that could be the problem be the hot ,cold switch as it restricts the flow to makes the heater hoter or colder , it might need tlc or replacing as it is manaul not elec

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2006 CHEVY COBALT OVERHEATING HAS NEW RADIATOR WATER PUMP AND THERMOSTAT


That is normal, it will not get hot without the thermostat. The water cools in the radiator and falls to the bottom and the bottom hose is cold. This is what cools the engine and stops it from overheating.

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CAR CONTINUES TOO RUN HOT AFTER REPLACING WATER PUMP, THERMOSTAT, AND RADIATOR, BEEN TOLD IT MAY HAVE AIR BLOCKAGE, DON'T THINK IT HAS A CRACKED HEAD OR BLOCK, DOES NOT LEAK WATER, NO WATER IN OIL, OR...


Try this.

With the engine cool remove the radiator cap. Now start the engine and let it warm up to the point where the thermostat opens. You can usually tell when this happens by checking the temperature of the upper radiator hose, and the coolant level in the radiator. It will start getting a lot hotter quickly when it does and the coolant level should drop.

While the engine is warming up, watch the coolant in the radiator for air bubbles. Fill up the radiator as needed while continuing to watch the coolant level. Having the radiator cap off while doing this allows the trapped air to escape more easily. If you do have a large air blockage then when the thermostat opens you should see a large drop in the coolant level. You want to keep the Radiator full. Once the air bubbles seem to have stopped you can replace the radiator cap.

You may have to repeat the process a couple times if there is a large amount of air trapped in multiple pockets.

A cracked head or block you can usually diagnose as there will be a lot of small bubbles coming out constantly while the engine is warming up, and even more bubbles if you rev the engine higher as the compressed air/fuel will be forced into the cooling system.

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2004 cheverolet impala 3.4L engine - Started running hot. Had never changed antifreeze, bought a flush and refilled with antifreeze. Ok for several weeks, started running hot again. Replaced the...


Sounds like you have an air;lock in your cooling system.Try placing a bleeder on the return hose to the heater core ........looks like a small tap

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