Question about 2004 Jeep Grand Cherokee

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2004 GC over heating 4.7 motor

Motor is over heating now, presurezzing the coolant system now. I think the head gasket blow last night. Is this a issue with the 4.7? is it the head gaskets or head bole issue?

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You might get a better (but disheartening) answer at one of the many Jeep forums.
That's where I look for ours if I can't find a problem with our Haynes service manuals.

Posted on Aug 22, 2008

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1 Answer

My Wife's care overheats and the heater only blows out cold air.


check that the thermostat is in correctly as it will cause no circulation but overheating. have a compression test done to eliminate head gasket /cracked head. There could be a blockage in the heater core but I am thinking that by passing the heater fan he has also by passed the actuator( coolant valve) for the heater core. Water pumps suffer from bad bearings and very seldom anything else. check that he hasn't blocked off the water to the heater core as well
the throwing back of the coolant is the boiling of the coolant in the block ( bad head gasket) due to lack of circulation. It may be a blocked radiator as flushing doesn't fix the blocked cores . If that is the case a new radiator is in order.

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How to change head gasket on 2004 aztek


My experience; 2001 Aztec. Overheating in small high performance aluminum motors is very common. If the car is run(even for a short time) with the motor overheated, you will damage the engine. I changed the head gasket, had the head done, replaced the gaskets on the manifolds etc. , since the top of the motor has to be taken down to get at the head. If I had it do over I think I would have pulled the motor, of course this is no small matter either. GM didn't put much thought into working on this car. My recommendation, after making sure its not a simple problem IE: fans, radiator, etc. Pour some sealer into the cooling system and try to sell it to your worst enemy.

May 27, 2014 | 2004 Pontiac Aztek

1 Answer

Gets hot then cools down


it sounds like the cooling system is low on coolant or you may have a bad thermostat.another problem you could have is the head gaskets have a leak and it heats up then when the gasket starts to leak the cooling system pressure pushes the coolant out of the motor showing as a coolant leak or it is being drawn into the cylinder and burnt causing the heat to go away and blow cold.

Mar 16, 2011 | Chrysler Laser Cars & Trucks

1 Answer

My 2004 Chevy Impala only blows cold air with heat on. The heater would only keep it a little warm the other day but now only seems to be blowing cold air.


Check in the main radiator with the motor cool that the coolant is full as if the coolant is low there will be no heat in the heater. If it is low you need to check for leaks or head gasket problems. If its full check that the temp guage is coming up to its normal position as the thermostat could be faulty. Then make sure that the heater tap is operating corectly.

Feb 27, 2011 | 2004 Chevrolet Impala

1 Answer

Heating has stoped working and there is a little water in the oil, think radiator may be leaking, does my car just need a new rad


water in the oil will turn the oil brown like mud,is that what you see? if so,then you have a blown head gasket,do not run motor if this is the case as the motor wiil spin a crank bearing or lock up.are you sure about the water in the oil? look for real brown oil just like mud with bubbles on the oil dipstick. if the heats stopped working it may be because the radiator's low on fluid. look in the radiator for low coolant,if you can't see the coolant when you remove the radiator cap,it's low. with engine cool,remove the radiator cap 1st then start the engine. do you see steam and fluid blowing up frome the radiator? if so,you have a blown head gasket in the motor. head gaskets can blow and leak water into the oil or oil into the radiator. or blow and leak into the exhaust sysytem and blow coolant out of the tail pipe. three different ways for a head gasket to blow. usually the head gasket only blows when the engine has been run really hot!!! hope this helps.thank you for choosing fixya .com

Jan 06, 2011 | 1997 Hyundai Accent

1 Answer

WHY IS MY 98 PONTIAC SUNFIRE OVER HEATING? HAS NEW RADIATOR COOLING FAN NO LEAKS IN COOLING SYSTEM.


A thermostat that does not open and close would cause these very symptoms. Since it does not allow coolant to flow through the system, it will make the engine overheat. Since it won't allow the "heated" coolant to pass by your fan, the heat will continually blow cold air.
Stop driving the car immediately, becuase the next step will be some blown gaskets - especially head gasket. Other possible reasons can be as follows:-- It could be just low on coolant. if it is then add coolant... with low coolant the water pump can not move enough coolant to supply hot coolant to the heating system . also if its low the motor will over heat fast..... If the system is full then you may have other problems.. such as 1) bad thermostat 2) bad radiator cap ( not holding pressure so it will leak coolant) 3) blown head gasket . 4) bad heater core (leaking coolant out.. check the floor board under the dash on the passenger side.) 5) bad hose or clamp. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Aug 12, 2010 | 1998 Pontiac Sunfire

1 Answer

Car overheats as soon as i start driving


A thrmostat that does not open and close would cause these very symptoms. Since it does not allow coolant to flow through the system, it will make the engine overheat. Since it won't allow the "heated" coolant to pass by your fan, the heat will continually blow cold air.

Stop driving the car immediately, becuase the next step will be some blown gaskets - especially head gasket.
Other possible reasons can be as follows:-- It could be just low on coolant.
if it is then add coolant...
with low coolant the water pump can not move enough coolant to supply hot coolant to the heating system . also if its low the motor will over heat fast..... If the system is full then you may have other problems.. such as
1) bad thermostat
2) bad radiator cap ( not holding pressure so it will leak coolant)
3) blown head gasket .
4) bad heater core (leaking coolant out.. check the floor board under the dash on the passenger side.)
5) bad hose or clamp.
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Aug 12, 2010 | 1996 Pontiac Sunfire

1 Answer

Heater blows cold air when i turn it on blows a little warm air then it is cold


It sounds like you may be leaking coolant and are low on coolant. Low or no heat is a sign of the coolant being low. Vehicle can leak coolant from multiple locations. Top off the coolant level and see if the heat returns or gets better and get back to me.

Other causes could be a clogged heater core, Temperature door motor/door not moving, cylinder head gaskets, engine block, thermostat.

Jan 28, 2010 | 2004 Chevrolet Impala

1 Answer

Heater is blowing cold air


Sounds like your coolant system is still short some fluid.
This is sometimes due to the cooling system needing special filler pipes to fill above the level of the heater core, to remove all the air trapped.
Also,,,you may have damaged the head gasket through over heating the motor,,if this is the case,,then you will be leaking coolant into the motor itself,,this will mix with your engine oil and could destroy your engine very quickly if not repaired.
Check it out carefully before you stop worrying.

Jan 19, 2009 | 2002 Dodge Stratus

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