Question about 2004 Pontiac Grand Am

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Hoses hard top and bottom on grandam 04 with 3400.Over heats when driving.

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  • yadayada
    yadayada Feb 23, 2012

    Please clarify what it you need to know here.

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  • Pontiac Master
  • 2,431 Answers

The radiator cap maintains pressure water boil at 110F, now if you pressure boiling water you increase the boiling point for ever 1 LB you increase the boiling point 10F. So the vehicle optimum temperature is 210F. You have 2 possible head gasket scenerio. 1 when overheats and has a head gasket you get water and oil mixed. the second is what you have combustion in the cooling system.When the vehicle is cold or cool open the radiator cap smell in the radiator if it smell like fuel or a\burnt rubber you will need a head gasket and to find the reason it overhead to begin with

Posted on Feb 24, 2012

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1 Answer

Symtoms of faulty thermostat water


Before answering that, the thermostat keeps the water in the engine until a specified temp inside the engine normaly around 190 degrees..then opens up to cool through the Collins system and allows hot water to the heater core inside the vehicle....Two major symptoms are engine over heating number one..Cold weather engine is hot but no or very little warmth of the radiator hoses with no heat to heater core inside the car..Not an exoensuve part or a hard job,,most are located at the bottom of the top hose where it connects to tne top of the engine..good luck

Mar 15, 2015 | Cars & Trucks

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The radiator cap is on the box on the box on the firewall not on the radiator but never heated up before he added the other hose n it looks backwards top hose on box to bottom of radiator n vise versa I...


the top box as your calling it is the coolant expansion vessel and the cap is obviously for topping up coolant, the hose on the top of this vessel is the hose that carries the expanded coolant from the engine so that there is not to high a build up of pressure,the hose at the bottom of expansion vessel goes to the bottom hose via another set of hoses which link up the heater matrix, there is a top and bottom hose on the radiator , the top goes to the engine with the thermostat inline ,the bottom hose goes to the water pump for circulation .let me know your vehicle make and model , year etc and i'll find a diagram for you

May 29, 2014 | Cars & Trucks

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I have a 2002 gallant and the heat doesnt blow warm air..any thoughts?


Make sure that the radiator is full and if you still dont have hot air then check to see if the top rad hose and the bottom rad hose are hot after driving for 30 minutes. Now if the bottom rad hose is not as hot as the top hose then replace the thermostat. If both the hoses are hot then check the two hoses going into heater core at the fire wall, both of the hoses should be hot, if not then problem is in the heater core.

Nov 08, 2011 | Cars & Trucks

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Over heating while driving. does not over heat


First of all run car up and check to see if the fan cuts in, make sure the top and bottom hoses are the same temperature once at operating temperature. if all this is ok then it sounds like a blockage somewhere... possible radiator

Mar 20, 2010 | Pontiac Grand Am Cars & Trucks

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My 1997 CRV overheated last week, and after adding water noticed that the dual fans behind the radiator never came on. Might this be the problem?


if over heated in town driving yes.also check bottom and top hoses must be same temp when car warm. if not possible thermastat.good luck.

Aug 17, 2009 | 1997 Honda CR-V

1 Answer

My s type over heats and blows cold air please help


hey deanfuller,
Ok, ive seen this alot with this year s-type, the only problem is its always something different.

What i would do first is warm the car up, NOT TO HOT, but warm it up and start feeling hoses. Turn your heat on full blast and let the car idle. When the car is warm all your coolant hoses should be warm, check the top and bottom radiator hoses the hoses before and after the thermostat.

I mean it coolant be coolant gumming up, radiator plugged, bad thermostat, bad or plugged heater core, bad fluid valve just a ton of stuff soo its hard to say one.

But after you checking the hoses, this is what i think it is, this is just a educated guess. I think its your fluid valve not opening. This valve is located on the passenger side of the radiator all the way on the bottom. There are i think either 2 or 3 small hoses coming to and from it. Now this valve is electronically controlled so you have to get a multi meter and make sure it is getting voltage at the 2 pin connector. If it is, then you can replaced the valve.

I know this is alot, i hope this helps you out. Start with this and let me know if you need more.

Apr 18, 2009 | 2000 Jaguar S-Type

1 Answer

Temp. gauge is red lining hoses top and bottom are rock hard.


is your cooling fan coming on when the engine heats up? the hoses are hard because you have so much pressure built up from overheating.

Check coolant level in reservoir AND radiator when engine is cold.
Other than that, thermostat may be stuck shut.

Feb 27, 2009 | 1999 Buick Century

1 Answer

No heat


Have you felt the hoses going to the heater core ?

Your heater core may be bad also.

Jan 15, 2009 | 1999 Dodge Stratus

1 Answer

Not hot enough


check the thermastat

Nov 23, 2008 | 2002 Pontiac Montana

2 Answers

1991 Daihatsu Charade 3 Cyl


Sounds like the radiator may need to be cleaned and bored. Under slow, in town driving conditions, the engine isn't working too hard. Long trips means the engine has to work a lot harder. If the cores in the radiator are plugged, the water can't get through to be cooled by the air.

Oct 04, 2008 | 1990 Daihatsu Charade

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