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Overheating and overflow tank is leaking

Tiny
ALEXTTT
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
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?
Friday, February 21st, 2020 AT 4:33 PM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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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Friday, February 21st, 2020 AT 4:43 PM
Tiny
ALEXTTT
  • MEMBER
  • 59 POSTS
How do I bleed the system?
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Friday, February 21st, 2020 AT 4:51 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Friday, February 21st, 2020 AT 5:07 PM
Tiny
ALEXTTT
  • MEMBER
  • 59 POSTS
Do I need to unscrew the screw on top of thermostat?
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Friday, February 21st, 2020 AT 5:29 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You can while filling the coolant but not when it is running.

Roy
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Friday, February 21st, 2020 AT 5:46 PM
Tiny
ALEXTTT
  • MEMBER
  • 59 POSTS
So just keep topping it off from the radiator until it's full?
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Friday, February 21st, 2020 AT 6:01 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Saturday, February 22nd, 2020 AT 1:18 AM

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