Question about 2005 Pontiac Grand Prix

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Coolant system Running hot - may be air locked - How do you get the air out of the system?

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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.

Posted on Jan 18, 2013


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02 lincoln navigator blows cold in the front but hot in the rear and both heater cores are new

i'd guess at an air lock in the front core , try bleeding the system turning the temp from hot to cold with engine running and while bleeding watch for any drop in coolant level as dont want more air entering the system

Oct 18, 2014 | Cars & Trucks

2 Answers

2000 monte carlo. .. coolant light won't turn off ... put tune up and new manifold

Is it running at the right temperature and is there coolant in the system and has it been refilled recently?
Possible reasons are the sensor is faulty, it really is running hot or there is an air lock.
Also look at the connection to the coolant sensor, check its not corroded.

May 15, 2014 | Cars & Trucks

1 Answer

Toyota heater no warm air for 15mins

Sounds like an air lock!
To Check....
With engine cold set heater to hot position.
ID return pipe from heater under the hood. Remove the return pipe at one end to check if coolant is there ( it should run from heater pipe) if no coolant you have an air lock.
To remove air lock top up coolant header when engine is cold. Leave heater in cold position replace pipe and start engine. Allow it to come to working temp then set heater to hottest position. Allow a few seconds and check if the pipe you first removed is hot. If no then ease the securing clip and carefully allow air to escape while engine is running... place a cloth over this area to prevent hot coolant spraying out. When coolant appears re-tighten pipe.
If you're not confident enough to do this ask a qualified mechanic to do it for you.
Again please be careful.

Oct 24, 2013 | 2000 Toyota Land Cruiser

1 Answer

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

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'

Jan 18, 2013 | Cars & Trucks

1 Answer

1991 Dodge Spirit Check gauges light comes on when accelerating. Car seems to get hot according to the gauges and then cools immediately down.

The first thing you should check is your coolant level. If it is low add coolant. Next start and leave the car warm up to temperture and make sure the coolant is moving, have radiator cap off and watch the coolant. What you are probably going to find is that when the car is warming up or warmed up that the coolant will be low causing an air lock in the system. When the air locks happen you will find a overheat or running hot situation. This is due to air will not cool the sytem you need coolant so when the air hits the sensors under acceleration the gauges go high and cause the check gauge light to come on.

Feb 05, 2010 | 1991 Dodge Spirit

1 Answer

Running hot at higher speeds.(6 cyl) Does not have a full shroud around radiator. Does it require one?

The shroud around the radiator fan mainly assists cooling at lower road speeds - it increases the efficiency of the cooling fan/s.
At higher road speeds the increased airflow due to vehicle speed makes the fan and shroud less important in that circumstance.

Running hot at higher roadspeeds can be caused by either engine mechanical fault (blown headgasket etc) or defective cooling system:-
Check for combustion gas bubbles in coolant reservoir - and ensure engine has no other mechanical running problems.

Check cooling system as follows:-
1) Faulty thermostat,
2) Blocked radiator air flow due obstruction such as grasshoppers or other insects,
3) Blocked radiator core (internal) by sludge/scale etc.
4) Collapsing radiator hose on intake side of waterpump (due to softened hose),
5) Cooling system not properly filled with coolant due air locks in the system - bleed off any air (as manufacturer specifies) during re-fill with coolant and ensure flow to heater core is enabled.

Oct 26, 2009 | 1985 Ford F150

1 Answer

05 silverado running hot

Look like you may have an air lock.
Put the car on level ground, start it from cold with the coolant filler cap off, have plenty of warm/hot water available.
Leave to idle watch the coolant filler area but NOT TOO CLOSE, when at operating temp it may appear to boil over loads of bubbles, gurgling and some steam, top the coolant system up with the warm water wait until things settle then replace cap you may have to do this a couple of times.
Remember your anti freeze?
Good luck!
Paul 'W'
Onyer~EDson(:0) {#><U.K.

Jan 16, 2009 | 2005 Chevrolet Silverado 1500HD

1 Answer

Water pump problem?

You need to make sure you don’t have an air lock. Find the bleeder valve for the coolant system and release the air. If you can’t find the bleeder, find the highest hose for the coolant system and make sure coolant is flowing through it.

Jul 05, 2008 | 2000 Jaguar S-Type

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