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2005 Pontiac Grand Prix running hot - no leaks found in coolant system may be air locked or what?

Running Hot - if air locked how do you get the air out of the system?

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Did you do a pressure test and do a leakdown test on coolant system? There's a bleeder connector on the drivers side if the intake that you can open once warmed up. Air bubbles will come out till antifreeze flows smoothly'

Posted on Jan 18, 2013

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SOURCE: 1995 Pontiac Grand Prix SE 6v 3.1L running red line hot!

maybe a water pump.

Posted on May 29, 2010

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On a 2005 Pontiac grand Prix if you've chained water pump and thermostat and the reservoir to the coolant still bubbles but its not running hot what's the problem.


If you continue to get bubbles in the reservoir after all the air is purged out of the system, then likely you have a blown head gasket, and the bubbles are exhaust.

Jun 12, 2015 | 2005 Pontiac Grand Prix

1 Answer

2007 grand prix losing coolant, no leaks any where. Code says misfire on cyl 6. Its not running hot. A gurgling sound in the dash is present, and 1 month age the heater and air stop working but then...


might be cylinder head gasket leaking to combustion chamber,small leak that it can sip into combustion chamber and burn but the coolant will not burn completely so will stick to spark plug and cause miss fire.

Oct 18, 2013 | 2004 Pontiac Grand Prix

2 Answers

I have a 2005 Pontiac Grand Prix that is running hot. I have changed the water pump and the thermostat. Checked all hoses and they are good(no leaks) yet I'm still running hot. What's the next


find the bleed valve on coolant system and burp it. make sure you are using a good 50/50 mix of coolant.
maybe run a coolant system cleaner . maybe a clog?
if worst come to worst blow head gasket

Apr 13, 2013 | 2005 Pontiac Grand Prix

1 Answer

Coolant system


May have a bleeder on the intake manifold to loosten up on the drivers side. Otherwise take radiator cap off and start car and let run for a while. If bubbling out overflow bottle, you've got a bad head gasket. 3.1's are known for that.

Jan 18, 2013 | 2005 Pontiac Grand Prix

1 Answer

How to get air out of the coolant system?


You can take the radiator cap off when cold and let run till thermostat opens and air bubles through hole. This will cause you to loose some antifreeze but you refill it while car is running. You may have a tube on tope the intake manifold usually on the left/drivers side that can be loosened once car is warmed up. If you go the cap route and the antifreese continues to blow out after filling, you have a blown head gasket.

Jan 18, 2013 | 2005 Pontiac Grand Prix

1 Answer

I have a 2005 Pontiac Grand Prix my cars fluids are all ok but its overheating. Put in a new thermostat and it is still running hot. The radiator cooling fans will not turn on where do i start?


CHECK COOLING FANS FUSE AND RELAYS.IF ALL IS GOOD PROBLEM COULD BE FAULTY COOLANT TEMPERATURE SENSOR OR FAULTY PCM OR FAULTY FAN WIRING.

Mar 31, 2011 | 2005 Pontiac Grand Prix

1 Answer

Friends car(2001 pontiac grand prix) 3.8 v6.started running hot,so he replaced thermostat. didn't help. so replaced water pump. helped very little. heater hoses cold to touch and blows cold inside. worked...


yes, but it's designed to drive the air out as long as you open the cap and run it until it's hot, keeping the radiator full. Eventually the air will come out and heater hoses should get coolant.

Sep 24, 2010 | 2001 Pontiac Grand Prix

1 Answer

Car runs hot. Its 2005 grand prix


Start by flushing your coolant system, then refill with a quality coolant.
Run up to temperature and check again for level (when cool again)

Check that the radiator is getting really hot quite suddenly when running from cold, as this is the best way of checking thermostat operation.
When over a set temperature (check your manual) the fan should come on.
If it never does - troubleshoot the fan (temperature switch or sensor first, then fan on direct feed to see if it powers up ok)

Feb 07, 2010 | 2005 Pontiac Grand Prix

1 Answer

1996 grand prix se running hot


it sounds like it may have air in the system there should be a bleeder valve for the coolant also if it ran hot you may have a possible head gaskt problem i would try bleeding the air out of the coolant system and if problem is still there you can buy a kit to check the head gasket it hooks to the coolant system and you pour a liquid in it and if it turns from blue to yellow it has a head gasket problem

Nov 05, 2008 | 1996 Pontiac Grand Prix

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