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George H.
George H., ASE Certified Technician
Category: Mazda
Satisfied Customers: 18394
Experience:  15+Years
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OVERHEATING. REMOVED THE THERMOSTAT AND THE VEHICLE

Customer Question

OVERHEATING. REMOVED THE THERMOSTAT AND THE VEHICLE OVERHEATS WITH THE STEAM AND FLUID FLOWING FROM THE COOLANT RESEVOIR
JA: Have you checked the coolant? Have you checked for a leak in the cooling system?
Customer: NO LEAKS BUT DID NOT PREURE TEST THE SYSTEM
JA: What is the model/year of your Mazda?
Customer: 2008 MAZADA TRIBUTE
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: MYSELF FOR NOW
JA: Anything else you think the mechanic should know?
Customer: THAT IS ALL
Submitted: 4 months ago.
Category: Mazda
Expert:  George H. replied 4 months ago.

Hello I will help,

Is the cooling fan running?

Do you have a coolant pressure tool?

Customer: replied 4 months ago.
no, the cooling fans are not turning and no i do not have the pressure tool
Customer: replied 4 months ago.
I have removed the thermostat. The vehicle ran for 30 minutes without the cooling fans engaging. The back pressure of the steam and coolant escaped through the coolant reservoir .
Customer: replied 4 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  George H. replied 4 months ago.

I am unable to speak on the phone so we can continue here.

If the fans are not running try turning the AC on and see if they come on then.

If the fans do work then I would check the temperature sensor to see if it is reading correctly. Either a scantool with data readout for coolant temp or a volt/ohmeter works for that.

If the fans do run and it still overheats it is a blown headgasket.

That is where the pressure tool comes in, you let the engine get dead cold and install the tool then run it at fast idle, if the pressure comes up before the coolant gets warm the gasket is leaking combustion pressure into the coolant.

Let me know how I can help

Thank you

Customer: replied 4 months ago.
I will further investigate and inform you of issues.
Expert:  George H. replied 4 months ago.

Great, please let me know what I can do to help. One of the chain parts stores may have a coolant pressure tester in their loan a tool program.

If you have further questions post back to this thread, I am here most of the time