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Started overheating, changed thermostat didn't help

Tiny
DAVID EDMOND
  • MEMBER
  • 2006 CHEVROLET UPLANDER
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 225,000 MILES
Started overheating, changed thermostat didn't help, then water pump, still same. Then replaced radiator, now getting no antifreeze going through heater core. Actually pulled off the hose going to heater core while running and had nothing coming out.
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Tuesday, January 19th, 2021 AT 8:47 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

Is the coolant full in the radiator? If it is low, you will have no circulation at the heater core. The heater core is the highest point of the system and it may be air bound.

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

https://www.2carpros.com/articles/car-heater-not-working

I would hook it back up and take off the cap. Run the engine at 1,200 RPMs until the thermostat opens and watch the coolant level. Add as needed. When you get heat, then the system is bled and see if it still overheats.

Roy
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Sunday, May 23rd, 2021 AT 11:31 AM

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