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Hyundai trajet reservoir boiling and car overheating. Fans are not working either?

Hyundai trajet reservoir boiling overheating when driven long distance. No apparent water leaks and the radiator fans both are not working. What could be the issue?

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6ya6ya
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Posted on Jan 02, 2017

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ghost45
  • 1280 Answers

SOURCE: 2004 hyundai sante fe is making coolant boil back

I take it this only happens when the vehicle is stopped & idling? If not, check radiator & hoses for blockage (since you've already replaced the thermostat & top hose) - repair/replace as needed. Next, check the coolant temperature sensor's operation (there are two sensors - one for the temp gauge on the instrument panel, the other is used by the ECM (PCM). If that one is malfunctioning (i.e., telling the computer that the engine coolant temperature is less than it actually is, The ECM (PCM) it won't turn on the cooling fans.
Since you didn't specify which engine you have (i.e., 2.4, 2.6 or 3.5), Photo locations of all three are included here.

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Hope this helps.

Posted on Sep 07, 2009

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acoates
  • 454 Answers

SOURCE: 99 hyundai elantra. I accidently left the cap off

Read this informative article that will tell you what to do to find out why the engine is overheating.

Posted on Dec 27, 2010

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1 Answer

That my van it a 2004 Hyundai trajet I just fix the radiator fans are working very good the oil are not mixing with the water can u pls tell me y it's doing that ?


Oil and water mixing is the intake manifold gasket and or head gaskets. If it has been the way for awhile. Replace the engine.

Mar 16, 2016 | Hyundai Cars & Trucks

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Electronic windows not working in Hyundai Trajet 2004


check masterswitch at driversdoor to see if switch has power or faulty relay.

Dec 19, 2013 | 2001 Hyundai Trajet

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Overheating


is the cooling fan/fans coming on, possibly needs relay rep[laced. (cooling fan should come on between 190 to 210 degrees)

Sep 08, 2012 | 1998 Volvo S70

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Pushing anti-freeze out the resevoir. Changed water pump, thermostat. Temp. gauge does not indicate overheating. Fans seem to be working OK.


Try replacing the radiator cap. A weak cap will allow coolant to leave the radiator and go thru the overflow tube to the reservoir.

Feb 01, 2011 | 2000 Hyundai Elantra

1 Answer

Overheating new fan new themo help please


I know it sounds redundant but, please replace your radiator reservoir cap;
they tend to wear out and, without extreme pressure that they provide to
modern engine systems the coolant boils. (you don't even see it leaving the coolant system as wispy steam as you drive. the physics are: more pressure higher boiling point.
this why modern cars can have much smaller radiators and, use auxilliary electric sensor
controlled fans.

Aug 04, 2010 | 2002 Lincoln LS

1 Answer

My car is overheating and i need to know how to put in the water pump?


Is the water pump leaking coolant? If not, then why do you think it's bad?

If the engine is overheating, there are several other things to look at before you consider the replacing the water pump.

Are the fans electric motor driven, or fan belt driven? If fan belt driven, replace the fan clutch. If electric motor driven, check the fan control module and/or fan motors to make sure all is good there. Fan control module tend to fail in weird ways, so if nothing is wrong with the motors, replace the module.

Always, always, replace a thermostat that has overheated. Once overheated, they consistently fail. Make sure you properly refill the radiator with coolant after the stat is changed.

Check that the bottom radiator hose does not collapse.

Check the radiator for corrosion. Boil the radiator out, or have it done, or replace the radiator.


Dec 18, 2009 | 1997 Buick Skylark

2 Answers

The cooling fans wont kick in and its boiling


The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
If the purge line is blocked you may have an air lock preventing coolant flow.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.

Air locks in the Northstar engine shouldn't be a problem as the system is self purging, providing all the hoses are clear.

Check the coolant level in the tank,it should be half way when cold.
There is no cap on the radiator as it is a fully pressurized system.

The expansion tank is the only means by which to add coolant to the Northstar engine.

Check to see if your fans are working by switching on the air con,they should run all the time.

With the air con off,the fans won't come on until the temp hits around 225 degrees.

Also, if it's boiling over, the cap on the expansion tank may not be holding pressure and therefore needs replacing.....a new cap only costs a few dollars so it is worth replacing to see if this solves your problem.

Oct 09, 2009 | 1998 Cadillac Seville

2 Answers

Overheating problem


looks like you have done everything but the problem with your car is that the cylider head gasket has gone have a look at the dipstick or remove the oil filler cap if it looks like mayo then 100% head gasket has failed you said no water on the floor so it must have gone into engine only way this can happen is head gasket failing, if you have put lot of water in to the cooling system then your sump will be full of oil water mix.

let us know your findings so we can help you more if you need it

Apr 22, 2009 | 2002 Volkswagen Jetta TDI

2 Answers

Were are the sensors for the engine fans in a nissaan sentra gxe


One of the common things that gets missed at times is the radiator is down in cooling antifreeze. The car will act as normal during the warm up cycle and then the temperature guage will rise and then it will slowly come back down as the thermostat opens and/or the electric cooling fans come on. In actuality the engine is overheating, but it is not boiling over. The level of abtifreeze is at just the right level of lowness that you experience this phenomenon. After the engine cools off , (DO NOT REMOVE WHEN HOT - YOU CAN GET SCALDED WITH BOILING WATER/ANTIFREEZE)), remove the radiator cap and check the level within the radiator and also the antifreeze reservoir level. You can buy a 50-50 mix of antifreeze and water that is ready to put into the radiator. If the level in both the radiator and reservoir are correct, you may have a bad thermostat or some other problem.
Bob - 2003 Nissan Sentra SE-R SPEC V

Nov 25, 2008 | 2003 Nissan Sentra

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