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

2002 PONTIAC MONTANA
256,000 MILES • 3.4L • 4 CYL • AUTOMATIC
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SMITHCRYSTAL
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  • 1 POST
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.
Jul 24, 2017 at 2:56 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
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.
Jul 24, 2017 at 8:34 PM
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