Question about 2005 Chevrolet Equinox

7 Answers

I have a 2005 Chevy Equinox, keeps over heating. We changed the thermostat, then the water pump, but it is still running hot. No leaks and no check engine light. Not sure what else the problem can be.

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  • Donald Freeman Jul 23, 2009

    We have bled the system, but it still over heats. There is no antifreeze in the oil, when it gets hot the antifreeze looks like it is boiling in the resevoir. Stll not sure.

  • Donald Freeman Jul 23, 2009

    We decided to open the bleeder while the truck was on and running high, As soon as it opens the temp drops to about 1/2. Could that mean there is a lot of air or a blockage? We will definately flush the system as well.

  • Donald Freeman Jul 23, 2009

    We have also noticed when we are driving it , the temp goes down. When we are at a stop or moving slow, the temp goes right up. It hasnt hit the highest where the water light comes on, but it comes close.

  • Donald Freeman Jul 25, 2009

    We actually changed the temp sensor. It seems a little better, but think there may be air in the system. How can you tell if all the air is out when you bleed it?

  • Donald Freeman Jul 25, 2009

    We actually changed the temp sensor. It seems a little better, but think there may be air in the system. How can you tell if all the air is out when you bleed it?

  • Donald Freeman Jul 27, 2009

    Well, looks like we have tried everything. We have been told a blown head gasket. NOt sure if there is anything easy to fix it, or pay much money..Any ideas???

  • Donald Freeman Jul 27, 2009

    There is no coolant leaking. But it seems as if the coolant disappears. The fan is coming on. Is there another? Could it still be coming on?

  • Donald Freeman Aug 01, 2009

    We have changed thermostat, temp sensor, intake manifold, water pump. But it still is overheating. There are no leaks, no check engine light.It will run normal for a little while, then the temp goes up, the water light comes on. We have bled it while it is hot and the temp goes down, but it mostly goes up at a slow spped and at a stop. When we took off the intake manifold, it was wet. We were told it shouldnt be wet. So it was changed. Not sure what to do at this point. Maybe a head gasket???? Its getting very frustrating.....

  • Donald Freeman Jan 14, 2010

    Our 2005 Chevy Equinox is over heating. It will run fine as long as we are moving, but at idle or a stop, the temp will go up to the red light coming on. Sometimes it will overheat while driving. We have changed, thermostat, water pump, temp sensor. We are not sure why it keeps over heating.

  • froggit_123 May 11, 2010

    i have a 2005 chevy equinox it is overheating, i have replaced the water pump,thermostat,sensor,checked the fans,and the relays,changed the oil in the process of this and there is no coolant in the oil,checked all hoses,and there are no leaks in the system so what am i overlooking. it overheats whether your driving or idling?

  • Anonymous Dec 03, 2016

    Im having same problem. i changed radiator water pump coolant temp switch thermostat. and reservoir. no i am changing the bleeder i was told it can cause over heating also.

  • Arthur Barnes
    Arthur Barnes Jul 08, 2017

    Had the same problem it's still overheating changed everything on it don't know where to go from here

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7 Answers

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  • Master
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These trucks are bad about developing an air lock in the coolant system. Be sure that there is no air in the system after sealing. This can be done by using the bleeder on the top of the engine near the water jacket. Hope this helps. good luck.

Posted on Jul 23, 2009

  • Chris  Jones
    Chris Jones Jul 23, 2009

    Ok sense it heats rapidly at a stop then the secondary fan is not coming on. Have the fan checked and see if it is getting power when the a'c is on. If it is getting power then the fan motor is bad. If there is no power then the fan relay is bad and will need to be replaced..

  • Chris  Jones
    Chris Jones Jul 25, 2009

    You will notice the temp change. Some vehicles actually needs a vacuum to run cool. That vacuum would be prior to engine heat.

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  • Chevrolet Master
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Make sure you have the proper antifreeze mixture of 50/50 (antifreeze/water), Too much water will boil over and too much antifreeze will gel up causing overheating. The other thing you can do is replace the temperature sensor and that is on the intake manifold by the thermostat housing, you can see it and can be replaced in under 10 min with a socket and disconnecting the wire clip to the sensor. If your not sure where the temperature sensor is, you can pick up the sensor at Auto Zone and they can give you the step by step instructions for you to replace it with common tools. 
The other thing to is the radiator fan turn on once the gauge hits 190-205 when the car is stopped, If the car is moving then it should not be overheating since the air should be flowing through the radiator. It also has been know for the Antifreeze to gel up and crystallize in the cooling system and may need to be flushed out, this is common with the Orange Antifreeze and is always neglected and the 50/50 ratio is no longer and thew antifreeze ratio is higher causing the gelling and then crystallizing. This can be fixed buy flushing out the entire cooling system with Preston Radiator flush, just follow the instruction and you should have the problem solved. 
Good luck and keep me posted, Start with the cooling system flush first before replacing the temperature sensor. 

Posted on Jul 23, 2009

  • Harvey N Tawatao
    Harvey N Tawatao Jul 28, 2009

    Cooling System, Initial Fill..........10.0 liters




    The 3.4 liters have a bad history of intake manifold gasket going bad and coolant leaking in to the engine. Inspect the under side of the oil cap and PVC valve and look for any milky sludge and water deposit which would indicate a coolant leak in to your engine. Note that the coolant is corrosive to the engine bearing so you need to address this issue as soon as possible to prevent additional damage to the engine. You may be lucky and that the system is still burping out the air and will settle down after all 10 liters are in and through the engine's water jackets. Good luck and keep me posted.

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I had this identical situation with my 2005 Chevy Equinox over the past few weeks. We made sure the coolant level was good, bled the system, changed the thermostat - but the problem persisted! I called and ordered a water pump, then realized that the REAL problem was the cover/cap for the radiator overflow resevoir. It seems thet the pressure system within the cap itself was not funtioning properly and that was causing the vehicle to overheat.

If you are still experiencing these problems. I would check that. It was a $6 fix for my car!!

Posted on Mar 16, 2010

  • dennisswan
    dennisswan May 26, 2012

    Thank you for adding your comment Chris. My wife's Equinox just started doing the same thing and it didn't make any sense to me. I replaced the thermostat, but would still overheat. After reading this, I replaced the cap and bled the air from the pin valve on top of the water jacket(above water pump) and everything is working like new again.

  • John Roberts
    John Roberts Mar 17, 2017

    Thank you HighspeedAK! Had the same issue

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  • Master
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If it heats up when it comes to a stop - it could be the fan or fan relay or temp sensor..

Posted on Jul 23, 2009

  • Carl
    Carl Jul 23, 2009

    Them I would be focusing on the fan sytem

  • Carl
    Carl Jul 27, 2009

    If the head gaskit was failing - you would be loosing coolant.. But your not loosing coolant - right ??



    Sinse you said --

    "Jul 23, 2009

    - We have also noticed when we are driving it , the temp goes down. When we are at a stop or moving slow, the temp goes right up. It hasnt hit the highest where the water light comes on, but it comes close"..



    This makes me think its somthing to do with the fan system..

    Fan relay,, fan sensor,, fan motor..

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  • 12 Answers

Check your oil for antifreeze...if there is any present, then your dealing with a blown head gasket or worse case cracked block/head.

Posted on Jul 23, 2009

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Hate to say this but its possibly a blown head gasket. This model is known for it. Mine was overheating, especially when I stop. Never a sign of fluid leakage. Water pump as well as thermostat seemed to work just fine. I got it out of the shop yesterday $2,116

Posted on Feb 19, 2015

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  • Master
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How do you know for sure its overheating. You could have a bad guage. A repair shop can tell you this..

Posted on Jul 23, 2009

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Posted on Jan 02, 2017

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SOURCE: Water pump on 2005 Chevy Equinox

Water pump is locate on the front center of the engine.

I will rate water pump change as a 7/10 in difficulty scale.

You should check for special tool(s) requirement from the library before you start.

It's a good time to change the drive belt at the same time.

50/50 coolant mix is fine.

If you haul heavy load or in cold climate then bump it up to 60/40 mix

DO NOT FORGET to find or draw the belt routing diagram before you undo the tension.

A 30 second sketch will save you a lot of time.

Posted on Jul 15, 2009

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Water pump is locate on the front center of the engine.

I will rate water pump change as a 7/10 in difficulty scale.

You should check for special tool(s) requirement from the library before you start.

It's a good time to change the drive belt at the same time.

50/50 coolant mix is fine.

If you haul heavy load or in cold climate then bump it up to 60/40 mix

DO NOT FORGET to find or draw the belt routing diagram before you undo the tension.

A 30 second sketch will save you a lot of time.

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