Question about Pontiac G6

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Pontiac g6 ran hot and won't start.

I was driving home and i noticed a decline in speed, i noticed my thermostat was going higher than normal. i parked and turned off vehicle but when it cooled down, it wouldn't start and i had to have vehicle towed.

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Have a compression test done to determine the extent of engine damaged from the over heating. I suspect that the compression will be very low from ring failure and the heads cracked or blown head gaskets from warped head/s. When this happens the prognosis for damage is not good.

Posted on Feb 14, 2014

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Posted on Jan 02, 2017

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SOURCE: 2002 KIA Sedona Overheating

most likely, replace thermostat .

Posted on Apr 14, 2009

  • 14036 Answers

SOURCE: 2002 Pontiac Montana won't start "sometimes"

check battery cables.i had a 81 oldsmobile it done the same thing. it would not start after it got hot.i start mess around with it i shook a battery cable.the positive cable had broke place in it when engine got hot the broke place expand causing a open in circuit so the starter would start.also check make sure your injectors not leaking .

Posted on May 19, 2009

  • 60 Answers

SOURCE: 2003 Cuts off when hot, will not start untill cool

My 2003 nissan sentra would get hot and stall out even in middle of highway doing 70 mph. The guages would go up and down. Would not start up all the time after stalling. had to cool down first. Nissan said it was head gasket, and wanted to charge 1000.00 for the job. I took to local dealer who charged me 550.00. Works fine ever since. Nissan dealer said they do like 3 head gaskets a week on the sentras. They have crappy ones in original parts. They have not recalled though.

Posted on Aug 11, 2009

  • 108 Answers

SOURCE: No interior heat until I start to drive

You most likely have an "AIR LOCK" within the Heater Core. This requires one to pressurize the Cooling System and loosen the heater hose at the HIGHEST POINT and bleed the Air out of the Heater Core. I am not familiar with the Nissan but have encountered this problem numerous times over the years. Most late model vehicles are equipped with Air Bleed devices which must be utilized any time coolant is drained and refilled.

Most all reputable Auto Parts stores sell and/or rent a pump that temporarily replaces the Pressure Cap that may be utilized to pressurize the system for this purpose. If you don't feel capable of performing the bleeding operation take your vehicle to an ASE Certified Mechanic and have it done correctly.

Posted on Dec 07, 2009

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SOURCE: Pontiac G6 (2006) 55k miles AC inop.

Load placed on the engine takes place when the Compressor clutch engages. It will not engage if the system charge is too low on freon. It needs to be checked with a gauge, I think that may be your problem.

Posted on Apr 22, 2010

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Your best bet would be to have a qualified repair shop check it .

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check the cooling fan and thermostat

Sep 22, 2012 | 2005 Pontiac G6

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My son said that the temp guage was reading about 2/3 of the way hot. After he turned it off the fan kept running for a couple of minutes after he turned it off. This is on a 2007 Pontiac G6.

The fan will run after the engines has been turned off. The temperature gauge at 2/3...It normal when the engine ran for two minutes then turned off. It could have been hot day, air conditioner is running, stop and go traffic, drive really slow. many factors affect the temperature of a engines. One way the manufactures fix some of this overheating problems were to install axillary fans, also increasing the psi on the coolant system from 212 degree F, to 240-5 degree F. Buy doing this the half water/half anti-freeze will not boil off. Just make sure that the bugs are removed from the front of the radiator and the air flow isn't restricted. GB...stewbison

Aug 31, 2011 | 2005 Pontiac G6

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Have a 2007 pontiac g6 3.5L engine. Replaced water pump; very simple procedure . Drained system and all but now it won't take the normal amount of coolant . Just fills the expansion tank and no more ....

if you are sure there is enough prestone in the radiator,start the car and let it warm up till the thermostat opens and the fluid level drops,then continue to fill the bottle.most newer vehicles have a valve you can open called the bleeder which should be somewhere on top of the metal coolant lines above themostat level. hope this helps

Aug 21, 2011 | 2006 Pontiac G6

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My husband overfilled the water reserve the other day on way to work. Once at his destination it started to burst out all over the place. after work he forgot to chek it...durrr lol then nxt day I cheked...

well in sounds like the reason it was hot was the thermostat had not opened up yet to allow the coolant to flow and when it went to normal temp is when the thermostat opened which allowed the coolant to flow through the motor and radiator which would take your reservoir down to a low level and that is when you top it off to full. If noticed no leaks you should be fine unless you have a bad thermostat which would make the car overheat. Anytime car gets hot you should turn on the heater to help cool the water temp in the motor, when you operate the air conditioner it makes the motor work harder which in essence the motor gets hotter.

Feb 07, 2011 | Ford Taurus Cars & Trucks

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No heat while idling, but when driving a little heat comes and as soon as we stop rolling there is no heat again....fluid thermostat...engine temperature in normal operating range..

first check and make sure coolant is at proper level. if the top radiator hose does not get hot, then change the thermostat. this may be sticking, and the problem. have a good day!! also make sure water pump is ok!

Nov 25, 2010 | 2006 Pontiac G6

1 Answer

Pontiac G6 (2006) 55k miles AC inop.

Load placed on the engine takes place when the Compressor clutch engages. It will not engage if the system charge is too low on freon. It needs to be checked with a gauge, I think that may be your problem.

Apr 22, 2010 | 2006 Pontiac G6

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