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Dodge-Plymouth Neon: Overheating

61 messages,  Last post on Oct 28, 2009 at 2:42 PM

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What is this discussion about? Dodge Neon, Plymouth Neon, Dodge Neon SRT-4, Engine, Sedan

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#32 of 61 2001 Plymouth Neon overheating by steamed Aug 11, 2007 (12:00 pm)
Recently purchased 2001 Plymouth Neon LX. Driving on surface streets it does fine, but when I get on the interstate after about 10 minutes the temperature starts to rise and within about 15 minutes it is at the top of the gauge. Pulling over and idling does not cool it off, neither does exiting the interstate and driving on surface streets. The cooling fan is functioning properly. Here is a list of repairs attempted to fix problem: cooling system power flush, new thermostat and radiator cap, new radiator, new water pump, new head gasket, cooling system flush again. What is causing this problem? Replies to this message: mcmanus (Aug 13, 2007 4:25 am)
#33 of 61 Re: 2001 Plymouth Neon overheating [steamed] by mcmanus Aug 13, 2007 (4:25 am)
Replying to: steamed (Aug 11, 2007 12:00 pm) I've got the nearly the same problem with a 2001 Mazda 626 LX V6, but with my car it's associated with air conditioning. List of repairs: two thermostats, water pump, radiator flush, cleaned the outside of the radiator, recharged the A/C, replace coolant reservoir tank.   It all started with me leaving the cap off the reservoir after checking levels and two days later overheated in stop and go freeway traffic on a warm summer day.   I think it has to do with the computer, because the fan runs when the engine is cold, even on 30F degree days.   BTW I'm here because we "inherited" a 2001 Plymouth Neon with nearly 120K miles from the stepson (eventually for the next stepson) and was wondering if anyone could advise how much to invest in maintenance.   Thanks!
#37 of 61 Re: 97 Head Gasket Story [nicoli] by Mr_Shiftright HOST Aug 13, 2007 (8:54 am)
Replying to: nicoli (Feb 01, 2007 10:05 am) Maybe this will give you some leads:   http://www.complaints.com/november2002/complaintoftheday.november19.7.htm
#38 of 61 2004 Neon SXT Overheating by ocmike Aug 21, 2007 (2:49 pm)
Replying to: badral (Jul 15, 2005 6:37 am) My 2004 Neon (45000m) overheats- as other posters have written- when slowed in traffic or idling for extended periods. My fans do not come on. I am in the process of replacing the relays- but how do I test the fans? "Jumping" fans is a bit outside my limited expertise here.   The AC unit works well- but falters (as in warm air) as the temp fluctuates. When I "open it up" the temp returns to normal.   Any assistance would be greatly appreciated as car repair costs are not something I can absorb right now.   Thanks!
#39 of 61 98 neon cooling fan relay location by blackdayz Jan 08, 2008 (3:48 pm)
the post says that the cooling fan relay location is underneath the battery box. Could it be possible that they changed the location of the fan relay in 98? Any information on this subject would be helpful. I re wired the fans to come on when the ignition switch is on so I know they work.
#40 of 61 95 neon sport by tomw6323 Apr 16, 2008 (2:58 pm)
I have a car with 61 k. When I shut my car off I can hear the water bubbleing back into the coolant bottle. It does not do it all the time. I check my oil everyday thinking maybe it may be a headgasket going. But, there is no signs of coolant in it. My car does not over heat and I recently changed my water pump. What could this be!? Replies to this message: Mr_Shiftright (Apr 17, 2008 6:59 am)
#41 of 61 Re: 95 neon sport [tomw6323] by Mr_Shiftright HOST Apr 17, 2008 (6:59 am)
Replying to: tomw6323 (Apr 16, 2008 2:58 pm) If there is actual PRESSURE in the coolant overflow tank, that is not a good sign.   You can test the coolant for combustion gases and you can also pressurize the cooling system with a pump and then pull the spark plugs and look for coolant on them. Both these tests would reveal a bad head gasket issue.   It isn't always the case that coolant enters the engine oil. It depends on where the head gasket fails within its pattern of various sealing surfaces, holes, openings, etc.   You can get water in the oil, oil in the water, gases in the water, or none of the above and still have a bad head gasket.   I'd certainly keep an eye on this since Neons are a bit notorious for bad head gaskets. But unless you are overheating, you don't have to worry just yet. But keep an eye on that temp. gauge.

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