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Radiator feels cold engine is over heating please explain how this is happening and the water comes up out of the bottle cap when it's closed

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Sounds like the thermostat is stuck, not allowing hot water from the engine to flow to the radiator. Thus the engine is getting overheated and the radiator still feels cool.

Posted on May 07, 2010

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2 Answers

1999 Dodge 1500, After driving 30 miles the heat is barely warm. Heater core hot both inlet and outlet and the bottom of the heater core is hot, top rad hose warm, bottom rad hose cold, Radiator cap u


sound like the impelled in your water pump may have failed. Or your system is air bound. Try to open the rad cap when its cold and let it run and see if air bubbles come to the top

Oct 04, 2014 | Dodge Ram 1500 Cars & Trucks

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Over heating


How did you check thermostat? Did you check coolant level. Is the auxiliary water pump leakinh

Jun 14, 2014 | 2000 Dodge Durango

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Over heating on my dodge intrepid 1997 after short time of driving


CHECK ENGINE COOLANT LEVEL.MAKE SURE COOLANT OVER FLOW JUG HAS COOLANT IN FULL COLD MARK.IF COOLANT OVER FLOW JUG IS EMPTY RADIATOR GOT TO BE LOW ON COOLANT POUR COOLANT IN THE OVER FLOW UNTIL COOLANT LEVEL STAY AT THE COLD FULL MARK.SEE IF RADIATOR DONT HAVE A RADIATOR CAP YOU HAVE TO POUR COOLANT IN THE OVER FLOW JUG COOLANT WILL FLOW DOWN IN RADIATOR UNTIL COOLANT LEVEL STOP AT FULL COLD MARK.IF COOLANT LEVEL OKAY.YOUR THERMOSTAT NEED CHANGING ALSO RADIATOR PRESSURE CAP.HAVE RADIATOR FLUSHED OUT.HAVE ENGINE BLOCK FLUSHED OUT.CHECK ENGINE OIL IF OIL LOOK LIKE MILK SHAKE ON OIL DIP STICK YOU HAVE LEAKING HEAD GASKET THAT WILL CAUSE ENGINE OVER HEAT WHILE CAR IN MOTION.CHECK WATER PUMP MAKE SURE ITS WEEP HOLE NOT LEAKING ANTIFREEZE IF SO WATER PUMP NEED REPLACING.

Jun 20, 2011 | 1997 Dodge Intrepid

1 Answer

Yes it is normal just no hot air


1. When setting the temperature to MAX, blower level to FULL and outside air Vent CLOSED, no hot air comes out after 2-5 minutes?
If YES, when did you last flushed your radiator and is it full?
2. if more than 5 years ago, flush radiator system, instructions are usually in Owners manual. Use a bottle of Radiator cleaner, run egine hot for about 10-15 minutes, carefully open petcock in bottom of radiator to flush out radiator, WARNING, careful as flushed coolant would be boiling hot. As sson petcock is open and water start to flow out, carefully open radiator cap to enhance flushing flow. Use garden hose to fill radiator while flushing until water coming out from petcock is cold and clear.
Once clear, start engine, turn heter full and blower full blast and keep hose in radiator flowing full, leave petcock open until clear water flows out again. Once clear waters comes out, turn off engine,turn off garden hose and let water drain empty radiator. Once it stops flowing out, close petcock snug and put radiator cap on, pull off radiator coolant catch bottle, clean bottle for any debris and dirt. Drain any water, leave bottle empty and put it back onto its place.
3. Fill radiator with 1 gallon (4L) of concentrated coolant, top up radiator until full, fill catch bottle with concentrated coolant, start engine and keep it overflowing until no bubbles comes out and the radiator is fully hot. Once it is flowing good, close and connect everything. Drive with it and keep catch bottle filled as necessarry.
Good luck. Give as vote and good comment if this advise solve youor problem. Thank you.

Jan 05, 2011 | 2000 Chevrolet Suburban

2 Answers

Heat is not working - coolant was low so filled it.... problem here... heard something about an air pocket


If you dont have an external coolant leak anywhere under your hood that has shown up on your driveway it could be the intake manifold or the headgasket leaking. Also check the thermostate to solve the heat issue.

Jan 05, 2011 | 1998 Pontiac Bonneville

2 Answers

Water comes out of the over flow bottle(i checked the cap)


make sure you dont over fill the radiator bottle past max, something else to try is run the system with out the cap on for a few minutes at idle to expel any air pockets in your cooling system.

Jun 22, 2010 | 1992 Toyota Celica

1 Answer

How to replace thermostat on


Do this when cool. Take radiator cap off, start the engine, turn on heat (not defrost) and now top up coolant to about an inch or 2 from top of radiator, as level drops down, and let vehicle run until the radiator fan comes on, then off, about 3 times, and add coolant as needed while it's running. After that, put radiator cap back on tight & make sure return bottle is filled to proper level. Now try that & see how heat is, temperature gauge etc, and keep an eye on return bottle level for a while. Let me know how it is.

Mar 27, 2009 | 1992 Nissan Maxima

1 Answer

1999 astrovan heat system


check your engine coolant, sounds like it is low.

With the vehicle off and engine cold, take the radiator cap off. If the water level isnt at the top of the radiator neck and/or the adjacent plastic bottle doesn't have any coolant in it...

With the radiator cap off, start the engine and let it warm up. Completely fill the radiator to the top of the radiator neck and fill the plastic bottle to the "fill line" inscribed on the bottle...both with a 50% water, 50% coolant solution.

install the radiator cap and after a minute or so check your heat in the passenger cabin...hope it works well now.

Dec 23, 2008 | 1999 Chevrolet Astro

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