Started overheating, changed thermostat didn't help

2006 CHEVROLET UPLANDER
225,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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DAVID EDMOND
  • MEMBER
  • 1 POST
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.
Jan 19, 2021 at 8:47 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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
May 23, 2021 at 11:31 AM
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