Question about 2010 Toyota Fortuner 4.0

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Over heating- V6 4.0. Fortuner.

My Fortuner V6 has started overheating. I have replaced the thermostat, water pump, water temp sensor, viscus fan and done pressure test. Vehicle runs normal in cooler weather as soon as it gets hotter the temp gage climbs and it will start overheating. It seems to be an intermittent problem?

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  • Toyota Master
  • 1,059 Answers

Check if the thermostat is not faulty

Posted on Sep 18, 2016

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Posted on Jan 02, 2017

  • 75 Answers

SOURCE: 1990 toyota corolla wagon 1.6 liter 5 spd. overheating

you've got a possible blockage in the head or block.

Posted on Oct 03, 2009

  • 5 Answers

SOURCE: Overheating. Water pump appears to be good to go

the cooling system deponds on a certain amount of pressure in order to function properly, Have you tested the radiator and cap for pressure, the cap should say how many #'S it is rated at.

Verify the cap is the proper application. Most systems are a closed recovery system these days, check over flow tank & all hose's and connections, for any possible pressure leaks, visualy if you are flowing through the radiator, after the stat opens the flow should somewhat resemble a strean with current. looking through the radiator cap opening. do you have a suffecient amount of coolant to water ratio? is it loosing coolant liquid or does it just smell hot at times?

Did the thermostat get installed properly? how hot @ peak temp is it reaching, normal operating temp is around 180f to 200f.

Is the belt for water pump tight enough?

If you try to answer these questions it would be very helpfull and we can continue to address each issue as it rares it's ugly face....

It most likely flows from bottom to top. we will also want to verify the gauge or light is functioning proper, and not giving a false reading, when you jumped the fan did you verify it was spinning in the proper direction.

Posted on Nov 01, 2010

SOURCE: overheating, after 4 or5 miles engine gage is in

Please solve this problem, my car COROLLA 1988 automatic 1.6 has the same problem!!!!!

Posted on Nov 20, 2010

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Replaced head gaskets on pontiac trans am 1997 lt1 eng now its over heating


trapped air. When temp needle climbs to 1/4 way, loosen coolant temp sensor to bleed off trapped air in cylinder heads. Air is gone once coolant starts to stream out, but only open slightly at a time. May have to do in increments as trapped air will cause rapid overheat

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2001 deville over heating. Changed thermostat. Once old thermostat was off it was ok. Changed anyway. Still over heating.


First, check to make sure your cooling fan is working, if not , could be fan motor , relay or temp sensor. if it is, it may be a clogged radiator?? start with these things first, they are the easest ...there are a lot more things it could be... that will be more involved (harder) to get into...Hope this helps you ?? Good Luck

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Car overheating fluids are full can't find fuse for fans fans aren't comin on till I turn on heT


Could be thermostat is not opining or water pump is failing. I would start by replacing thermostat if that doesn't help then Replace the heat sensor that tells u temp and when fans should kick on. If Ur still having problems I would replace the water pump. But I highly doubt that it's the water pump. It's either thermostat or sensor.

Mar 31, 2011 | 2001 Pontiac Grand Prix

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My 2000 Saturn SL2 is overheating. At first it would overheat when sitting idle and then once speed reached 35+mph it would cool off, but now it gets hot and stays. What is causing this?


Well, the overheating at an idle would normally be caused by your cooling fan not engaging. I would first check to see if you fan is working by turning on your a/c (this will override the fan sensor and turn it on before it gets above operating temperature). If it doesn't come on you should check your AUX. Fan Relay. If thats ok, you probably need a new fan motor but first replace your coolant temp. sensor as this is an inexpensive parts and may save you quite a bit of money (also your vehicle may be running at the normal temperature but your temp sensor may be sending a signal telling you it's hot). This will explain why it was overheating at an idle. As far as it overheating while driving, you should first check to see if your water pump is leaking and make sure your belt is intact. If the water pump pulley is not spinning your belt will be glossy from excessive heat from friction. If your water pump is good and you can spin the pulley by hand, you should then consider when the last time you replaced the thermostat as it may be stuck closed. also your radiator may have some blockages in it so I would replace the thermostat, drain the coolant by removing the lower hose and spray a hose into the radiator until the water comes out looking pretty clear. I hope this helps you figure this out.

Aug 16, 2010 | 2000 Saturn SL

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My car just started overheating but not smoking and the check eng


Well....deep breath.......it's not bad.

1. Check your radiator coolant level

2. Check/Test radiator fan

3. Test/Replace radiator cooling fan relay

4. Replace the thermostat

5. Check/Replace the coolant temp sensor

6. Replace the water pump.


Feb 06, 2010 | 2001 Lincoln LS

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Son has a 1997 contour with 2.0l overheated


hard to get to and difficult job...are you sure you dont have cracked head? is there water in the oil....does the oil look milky? look in the radiator is there oil residue in the coolant........

Nov 08, 2009 | 1997 Ford Contour

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Aloha,have 98 base mustang, overheating after many replacements


i would change the water pump and check for plugs in the heater core

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2001 Oldsmobile Alero overheating


I think you started out looking in the right places. Replacing the coolant, thermostat, relay and sensor are all fairly inexpensive.

I believe you either have blockage in the system (especially if you're using tapwater), or your water pump may be failing.

I would first either take it to a radiator shop and have them flush the cooling system out thoroughly, or else pick up a chemical flush kit and do it yourself. This involves more than just drain and refill.

If this doesn't work, your next step will probably be replacing the water pump. At almost 200k miles, it's probably about due anyway.

Jun 16, 2009 | 2001 Oldsmobile Alero

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