Question about 1999 Dodge Neon

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My 99 dodge neon keeps overheating when i turn on my AC ,i changed the radiator,AC condenser,thermostat.and i checked for oil in the water or water in the oil i also checked my fans but they are worki

My dodge neon keeps over heating and don't know what else to check i was told it could be my heater core that is clogged if it is could that be fixed or do i have to buy a new one?what else could be making my car over heat what should i check next?

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  • tstone26 Dec 04, 2008

    I have a 98 neon r/t have had it since 2000. Started overheating 4 years ago when i replaced the radiator... I have put at least 10 thermostats in it a water pump all new hoses new radiator cap tested the head gasket and replaced the fans and still cant find the problem!!!!!!! Its been an on going battle for YEARS!!!!!!!I I think the only solution is to replace everything!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



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What about a new thermostat? Ten bucks at the parts store and a few minutes of work. Here's a good link for a do-it-yourself installation:

Posted on Oct 23, 2008

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Are the fans turning on???? if this has ac turn it on high. fan should kick on instantly. good luck .....jimmy

Posted on Sep 24, 2008


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1 Answer

My 2004 dodge neon is over heating, i replaced the radiator and the thermostat. It is still overheating, can you help me figure out the problem?

i had this same problem with a 2004 dodge stratus. turned out to be mixed coolants. check to make sure that the thermostat is opening and closing properly. you can do this by dropping the thermostat into boiling water. if it opens its not that. could also be the water pump, to check this look for a slow drip of coolant coming from the water pump. water pump has what is called a weep hole and when it goes bad coolant will drip from the weep hole.

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Car keeps overheating

Assuming the engine is ok, no leaking head gasket or exhaust problem, you need to know if the radiator fan comes on when the engine reaches 225 degrees. It should also come on when you turn the ac on if the ac works.
Its also possible you have air in the cooling system.

Jul 20, 2012 | 2005 Dodge Neon

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My neon keeps running hot,the oil light comes on and the valves are tapping;i changed the oil but the same thing keeps occuring.

for the overheating problem, make sure you radiator is not obstructed, then check and make sure the thermostat is opening, this can be done by taking the thermostat out and drying it off and take a lit cigarette lighter and hold very close to thermostat, if it doesn't open, change it. For the valves, try dumping some lucas oil treatment in it and let it run for a while and drive it, usually works for me. Hope this helps.

Aug 24, 2011 | Dodge Neon Cars & Trucks

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My daughters 1995 has started to overheat while she is driving. i will replace the thermostat, but could there be something else i should be looking for.

Usually when the thermostat goes bad , it is in the open position, cooling the engine, not making it over heat. You can check it, but I would check for oil in the top of the radiator, and steam coming out the exhaust. When a head gasket goes, you can drive 300 miles without it overheating, then another day, you won't go 10 miles, then all of a sudden, it won't go at all. A radiator shop can do a compression check for you and tell you exactly what piston it is. If you are still driving it, keep an eye on the temp gauge, don't let it overheat, and carry water with you. Make sure the radiator is clean, inside, no rocks clogging up the tubes, no grass on the out side, no bugs, make sure it has coolant in it, not just water, and make sure the fans are working in city traffic, and the AC is working properly. For some reason, it will upset a radiator some times. Check it out.

Aug 10, 2010 | 1995 Dodge Neon

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My 1999 dodge neon is overheating and just changed water pump and thermostat radiator. No leaks and no water in oil. Changed thermostat again and same problem . How can you tell if water pump is bad and...

Last time I had this problem I had a cracked head. With the cap off the radiator, run the engine at idle to operating temperature. When your looking in the radiator you should see the water circulating if the water pump is working. When you say the motor is over heating, if you have fluid coming out of the over flow hose then yes you are most likely overheating, if you are just seeing the gauge indicate you are over heating you may just have a bad engine temp sensor.

Jun 26, 2010 | 1999 Dodge Neon

3 Answers

Over heating

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Oct 23, 2009 | 2003 Dodge Neon

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My 04 dodge 1500 keeps over heating when i turn the ac on or when im going up hills "why"

under maximium load your cooling system is struggling asuming you have an automatic transmission,it is cooled through the radiator,when running the ac your condenser is hot,right in front of the radiator,if your not leaking,and your anti-freeze looks bright green an clean ,and the fan or fans are working ,first change the thermostat,cheapest,remove the serpintine belt and inspect the water pump pulley,spin it by hand,try to tip it forward and backward,to see if it wobbles,it should spin smooth and quiet,if it has a chattering or growling feel,or the pulley wobbles change the pump,the only thing left is the radiator ,make sure that debri or something isnt stuck in front of it a small piece of paper is enough to restrict airflow,inspect the core is it turning green and the fins are falling out ,is the plastic shroud intact around it, lots of things could be going on ,the transmission could be low on fluid,and running hot,causing the excessive load on the radiator,disregaurd this if you have a manual.need more info to pinpoint further,hope this helps

Jul 11, 2009 | 2004 Dodge Ram 1500

2 Answers

96 Dodge Neon, not you average overheating issue

If the car runs good, and as long as you're keeping up with your regular oil changes, using the correct fluids (coolant, oil, fuel, etc), all coolant hoses are fresh, no leaks or excessive corrosion/contamination, and you followed all procedures correctly, then I suppose it could be the coolant temp sensor or related wiring/ connections. Normally this would trigger the cel (check engine light)...does it come on periodically when you turn the key on? Unfortunately, there are some dirty dealers out there who will tamper with this light (ex:remove the bulb) b4 selling. Have it scanned anyhow. If the check engine light works at startup/no codes, double check the thermostat. Did you flush the system b4 installing the water pump? Otherwise there may be some kind of blockage (or air) in the coolant passages. Don't get frustrated, and diagnose the ****** one step at a time. Good luck, hope this helps!

May 18, 2009 | 1999 Dodge Neon

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