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Dodge-Plymouth Neon: Overheating

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

You are in the Dodge/Plymouth Neon Forum. Your Hosts are pat & karens

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


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#2 of 61
95 dodge neon coupe, overheating after 10 mins. by badral
Jul 15, 2005 (6:37 am)
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Hello!
 
I have 95 neon sports. 114k miles. (I know it's crap!) It's overheating after 10 mins of driving. The shop I took it to said the problem was thermostat housing, which I replaced. Coolant is usually full, though sometimes it is gone (I don't know why). Even with coolant, it heats. If I turn on the heat at max to my foot, heat marker gradually normalizes. If I turn off the heat, it goes up again. I don't think I should be driving like this. It makes me hot.
 
I don't wanna go back to that shop. Anyone have an idea what is the problem? Thank you!
 
#3 of 61
Re: 95 dodge neon coupe, overheating after 10 mins. [badral] by 71charger
Jul 18, 2005 (10:56 am)
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Replying to: badral (Jul 15, 2005 6:37 am)

Could be a lot of things. Do you have bubbles in the coolant? If so, I'd say headgasket. If not, possibly a clogged radiator, stuck thermostat, collapsing radiator hose are a few possibilities.
#4 of 61
Re: 95 dodge neon coupe, overheating after 10 mins. [71charger] by badral
Jul 21, 2005 (6:51 am)
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Replying to: 71charger (Jul 18, 2005 10:56 am)

that sucks. well you gave me something to start with. thanx.
 
its good clean car. I just replaced timing belt and waterpump. I'd like to at least reach 150k, before dumping it.
#5 of 61
car overheating, radiator fan is not working by phatbecker
Aug 13, 2005 (2:49 pm)
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I have a 97 Dodge Neon Highline (DOHC) and my car is overheating. The car does fine while I am driving (because of airflow) but when it sits idle the temperature gage increases to HOT in minutes.
 
I can see the the radiator fan is not kicking on when this happens. I also turn on the AC and the radiator fan is not starting (I believe turning on the AC, turns on the radiator fan.)
 
To try and troubleshoot this, I put +12V to the radiator fan motor and it worked fine, so I am guessing it is one of the relays and/or switches. I checked the connection to the engine coolant temperature senser and it was good. Also, I replace the engine coolant temperature senser. I am now stuck. I checked the Haynes manual and it explains that this problem could be in the PCM (Powertrain Control Module) and should be serviced by a dealer.
 
Does anyone have any recommendation before I go to a dealer? Would it be better, easier, cheaper to just replace the PCM.
 
Thanks in advance for your help.
#6 of 61
Re: car overheating, radiator fan is not working [phatbecker] by rtulloch
Aug 14, 2005 (7:59 am)
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Replying to: phatbecker (Aug 13, 2005 2:49 pm)

There is a rely that controls the radiator fan. Have you cheked that?
#7 of 61
Re: car overheating, radiator fan is not working [rtulloch] by phatbecker
Aug 14, 2005 (2:36 pm)
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Replying to: rtulloch (Aug 14, 2005 7:59 am)

I did not check the relay. I am not sure where it is at? I could not find it in the fuse box and it seemed that all wires lead to the Powertrain Control Module (PCM).
 
Do you know where the relay is?
#8 of 61
Re: car overheating, radiator fan is not working [phatbecker] by rtulloch
Aug 14, 2005 (3:05 pm)
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Replying to: phatbecker (Aug 14, 2005 2:36 pm)

Should be with the other relays. There should be 3 or 4. If you can't find let me know I will get a book.
#9 of 61
Re: car overheating, radiator fan is not working [rtulloch] by phatbecker
Aug 14, 2005 (3:13 pm)
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Replying to: rtulloch (Aug 14, 2005 3:05 pm)

I have a Haynes book and I am only aware of relays on the fuse box (power distribution center) and my 1997 Dodge Neon does not have the radiator fan relay there.
#10 of 61
Re: car overheating, radiator fan is not working [phatbecker] by rtulloch
Aug 17, 2005 (6:19 am)
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Replying to: phatbecker (Aug 14, 2005 3:13 pm)

Hi:
 
  Looking in my Neon 2k manual from Haynes, the relay is shown on the electrical schmatic for the AC and physically located inside the fuse/relay box.
#11 of 61
Re: car overheating, radiator fan is not working [phatbecker] by tsteele6
Aug 19, 2005 (9:18 am)
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Replying to: phatbecker (Aug 14, 2005 2:36 pm)

I have a 1997 Neon. When I got it the fans would not work either. There is a small Mopar relay mounted (oddly) underneath the battery tray. For some reason, this fails reliably. It costs around $80 from Dodge, but I found it on Ebay for $32. Search on Ebay for "dodge fan relay" and it is the only thing that comes up. The relay is used on many Dodge models. Plug it in and the problem will be fixed.
 

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