Question about 2006 Pontiac G6

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Temperature gauage stays at 100 degrees but car seems to run ok

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Electrical: temp sending unit could be disconnected or bad, gauge on dashboard could be bad. check electrical bias from sending unit to gauge. something (electrical) could be telling the gauge that it has reached it limit. If car seems to be running fine,it could be the gauge, sending unit, computer chip bias?

Posted on Aug 05, 2008

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Is the needle going to the red part or the upper 3/4 part of the gauge?

If so you definately have an overheating problem. The car will run fine until it's too late.

Check the following:

1. Electric fans are coming on at temperature
2. Take off oil filler cap and check colour of oil. Creamy brown color indicates water getting into oil passages through head gasket or cracked oil passages in block.
3. Take off radiator cap when cold and check for coolant color as per step 2. Also check for coolant flow when keeping engine revs up. If not much flow (should be like a river flowing), could be blocked radiator.
4. At operating temperature hold top then bottom radiator hose with hand. If either of these 2 are still cool it indicates a faulty thermostat.

Otherwise water pump fins could be corroded.

Hope this helps :)

Posted on Aug 03, 2008

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Posted on Jan 02, 2017

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