Still is overheating

Tiny
AKSCHWARTZ
  • MEMBER
  • 2002 PONTIAC GRAND AM
  • 6 CYL
  • AUTOMATIC
I have a 2002 pontiac grand am v6 3.4 I have replaced the radiator, water pump, thermostat, oxygen sensors, and fuel injector. The cooliant level is fine but yet my car is still over heating I have taken it to three different mechanics and still is not fixed please help.
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Tuesday, March 1st, 2011 AT 4:24 AM

3 Replies

Tiny
FACTORYJACK
  • EXPERT
Explain the nature of when it overheats, i.E. Just idling, after pulling a hill or hard acceleration? With the several thet have looked at it, what diagnostics have been done? Has it been tested for combustion gases in the cooling system, and have the cooling fans been verified as operating? Are the cooling fans. Coming on?
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Tuesday, March 1st, 2011 AT 5:11 AM
Tiny
AKSCHWARTZ
  • MEMBER
It overheats as im driving normally, within 10 to 15 min it is at about 260 degrees then when I pull over it goes down a bit and stays consistant. Then when I start driving again it shoots back up to 260 degrees. It has not been tested for combustion gases in cooling system. The parts I mentioned that were replaced by 2 different mechanics then the last one I went to for diognostics said water pump was leaking and needed new radiator cap. It was fixed and it is still overheating.
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Tuesday, March 1st, 2011 AT 5:33 AM
Tiny
GARETHSTURMAN
  • MEMBER
Have you bled the air out of the cooling system properly. Alot of the time people just bleed it by the thermostat nut. Try bleeding it by the bleed valve on the radiator and by the heater matrix bleed valve.

Also use a old drinks bottle full of water/coolant mix and put it on the header tank. If there is air in the system still you will see air bubbles come into the secondary header tank and the coolant will replace it. Do this while its warm and when the thermostat is open.
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Tuesday, March 1st, 2011 AT 2:30 PM

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