1995 Dodge Neon Overheats After Thermostat

DODGE NEON
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NCORBIT2006
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  • 1 POST
I have a 1995 dodge neon/150,000 miles. I replaced my t-stat and now, after driving a very short time, the needle goes up 1/2 - 3/4 up and we can hear a bubbling noice for a short period after cutting the car off. The cooling fan is coming on after reaching a certain temp, which I know is normal. I have been told I may have a air pocket in the system. I removed the radiator cap, let the car run with the heater on full blast. I let it run about 30 minutes but the water level never dropped any. Do you agree this could be the problem and if so, how do you burp a cooling system. I have done it on fords & gm's but how do I do it on a dodge neon?
Thanks in advance to anyone who can assist me.
Mar 16, 2006 at 6:58 PM
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VANDRAGON
  • ✓Experienced Mechanic
  • 298 POSTS
post type and size of motor? on a mini van if it has the mitsu 4 cylinder, the t-stat has to sit it the motor
a certian way because of a bridge just under the stat.
if not it will not work correctly. did you check the water pump for leaks?
Mar 18, 2006 at 1:27 AM
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VANDRAGON
  • ✓Experienced Mechanic
  • 298 POSTS
sorry, i forgot to tell you how to burp it. while car is cool, without removing the radiator cap, remove the coolant sensor and let the coolant rise to the top of the whole and watch for bubbles, even let some drain out of the hole, if there are no bubbles then it should be burped. i hope this helped.
Mar 18, 2006 at 2:13 AM

Suggested Repair

Confirm engine type and that the thermostat is seated correctly, since a bridge under the thermostat can keep it from working if installed wrong. Check the water pump for leaks. With the engine cool and the radiator cap left on, remove the coolant sensor, let coolant rise to the top of the hole, watch for bubbles, and allow some coolant to drain until bubbling stops.

Conversation Summary

The owner of a 1995 Dodge Neon with 150,000 miles replaced the thermostat and then saw the temperature gauge rise to halfway or three-quarters after a short drive, with a brief bubbling noise after shutdown. The cooling fan comes on normally, and running the engine with the radiator cap off and the heater on full did not lower the coolant level. An expert asked for the engine type and size, noted that thermostat orientation can matter when a bridge sits under the thermostat, suggested checking the water pump for leaks, and described burping air by removing the coolant sensor while cool with the radiator cap installed.

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