Overheating and overflow tank is leaking

2004 PONTIAC GRAND PRIX
135,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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ALEXTTT
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My car begin overheating and I noticed that the overflow tank hose was leaking a lot. Will this leaking hose for the overflow cause my car to overheat?
Feb 21, 2020 at 4:33 PM
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ASEMASTER6371
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Good evening,

If the coolant level in the radiator goes low, yes it can.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Did you verify the coolant level?

https://www.2carpros.com/articles/radiator-pressure-test

It could be the thermostat. I would replace it to be sure. It is simple to replace.

https://www.2carpros.com/articles/replace-thermostat

Roy

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Feb 21, 2020 at 4:43 PM
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ALEXTTT
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How do I bleed the system?
Feb 21, 2020 at 4:51 PM
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ASEMASTER6371
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Run the engine at 1,200 rpm's and watch the coolant level and add as needed. When you get heat there is no more air. Put the cap on and take it for a ride.

Roy
Feb 21, 2020 at 5:07 PM
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ALEXTTT
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Do I need to unscrew the screw on top of thermostat ?
Feb 21, 2020 at 5:29 PM
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ASEMASTER6371
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You can while filling the coolant but not when it is running.

Roy
Feb 21, 2020 at 5:46 PM
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ALEXTTT
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So just keep topping it off from the radiator until it's full?
Feb 21, 2020 at 6:01 PM
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ASEMASTER6371
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Correct. Run it at 1,200 RPM's with the cap off and add as needed. When you get heat, the air is out of the system. Then install the cap and let it idle.

You will need a second person for this.

Roy
Feb 22, 2020 at 1:18 AM