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Overheating after changing the water pump, thermostat, sensor and radiator

Tiny
SMITHCRYSTAL
  • MEMBER
  • 2002 PONTIAC MONTANA
  • 3.4L
  • 4 CYL
  • AUTOMATIC
  • 256,000 MILES
No water in oil. No white smoke. I have bled it quite a few times to get air out of the coolant system. It continues to bubble off and on and it will get 3/4 of the way hot and then go back down to normal.
Monday, July 24th, 2017 AT 2:56 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
The symptoms you listed are typical of a leaking cylinder head gasket. Your mechanic can perform a chemical test at the coolant reservoir to check for that. Do not go looking for the less common and more elusive stuff until the head gasket is ruled out.
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Monday, July 24th, 2017 AT 8:34 PM

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