Overheating

Tiny
KJCRAPO
  • MEMBER
  • 2007 CHEVROLET EQUINOX
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
The car overheats after just ten minutes of running. When I drive the car it overheats right away. I replaced the thermostat, after that did not work I replaced the water pump. After that replacement did not work, I replaced the radiator with a brand new radiator. The car still overheats. There seems to be no coolant flowing through the hoses when the car is running or not running. I recently opened up the thermostat housing again and some coolant came out. I took off the brand new water pump, and coolant came out. There is no leak anywhere what so ever leading to out side of the car. Please help.
Friday, March 23rd, 2018 AT 2:25 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 34,332 POSTS
The best suspect is a leaking cylinder head gasket. I would start by performing a chemical test at the reservoir. If combustion gases sneak into the cooling system, it can pool under the thermostat and prevent it from opening. Thermostats have to be hit with hot liquid to open. Hot air will not do it.
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Friday, March 23rd, 2018 AT 6:02 PM

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