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Burp air bubble coolant system of dodge neon 1998

My heat indicator go up and down when I drive, never stay more than 30s at the max and then go down to normal, then after few minutes, go up again for about 30 seconds and go back to normal etc. Someone told me I may have air in the system.

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  • mag_irl
    mag_irl Jul 15, 2013

    thanks for the response. I changed the thermostat a week ago, so i don't think it's the problem.

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I don't believe you have air in your system. It sounds like a sticking thermostat to me. But you better figure it out quick those neon motors don't like big temp changes. Your playing with cracking or warping the head. Any way here's what i know about burping.
When you drain & refill a cooling system air is often traped in places like the heater core. If so the coolant level will appear full before it really is. To burp you need to add coolant till full or just over. Adjust the heater control to MAX heat. This will let full force of water pump to push air out of heater core. Fan speed dose not matter. Next start the motor & let it idle. As it warms up the thermostat will begin to open and close. This is when you should see fluid level drop as trapped air is pushed from system ( add fluid as needed). If this is working right you should fell quite hot air coming from heat vents. If air doesn't seem hot enough adding RPM by pulsing gas pedal should do the trick. And that should do it.

Posted on Jul 15, 2013

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SOURCE: 97 Diesel Jetta OIL LIGHT sensors mistake (Require?)Burping of a coolant system?

Most probably an air pocket in ur coolant system, just let it run without the cap on the coolant bowl until no bubbles come out.
As for ur oil light and buzzing, it's most probably the low oil level sensors tripping out, which is normal for a VW.

There are two oil sensors, one on the front of the engine near the distributor and one on the right hand side of motor when ur facing the motor. The are both the same size and have only 1 wire on em.

If i remember one has a white connector and one has a black connector. Costs about 20 bucks for the pair.

Good luck and get back to me if u have questions.

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water comming back through overflow always have to fill it every day . no water in oil

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SOURCE: 1997 2.4L Chevy Cavalier LS; Low Coolant Indicator and Temp Gauge

take the cap off of the radiator (whil engine is cold) start and run the vehicle. keep runnig 30mins after the vehicle is hot keeping notice of the rad fluid level.
keeping the cap off will prevent the pressure build up that woiuld keep the air in the system, keep adding water or antifreeze as the level goes down. this may take an hour or so.
also with the cap off, you will be able to see if your water pump is operating correctly. you will visibly be able to see movement in the rad when the pum is engaged.

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SOURCE: Honda 98 CRV temperature gauge goes way up after an hour on hwy

You will need to change your thermostat as it is stuck and is not responding correctly to temperature changes. Have your mechanic change the thermo, do a flush of the system and all should be good again.

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SOURCE: Why does my 91 VW Jetta stall out and lose power while driving?

I had a similar problem and the mechanic diagnosed it as a problem with the ignition coil. So you might want to get that checked.

Posted on Nov 11, 2009

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1 Answer

How to burp the cooling system a 97 neon


Just Crack it up take the cap off and let it run for a while if it has air in it you should see bubbles coming out.let it run for 20 minutes like that.

Hope this helps.

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No heat coming from the vents.


If it is a manual system--sounds like coolant low ie: air bubble in system. If it is ATC system, Check Codes, if no failure codes, coolant may be low--air bubble in system--most Durango's have air bleeders in system.

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sounds like air in system ...
Leave the radiator cap off, turn the engine on and let it run until the radiator "burps": You will see the coolant level drop and may see or hear a large air bubble come to the top as the system burps.
Keep an eye on the temperature gauge throughout this process

  • Refill the radiator to the top and coolant reservoir as needed. Put the radiator cap back on. Note that if the engine runs hot after this procedure there may have been another pocket of air that "burped." Let the engine cool down and then add more coolant to both the radiator and the coolant reservoir.
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  • Add a mixture of one-half water and one-half antifreeze to the radiator. Fill it right up to the top.

  • 2

    Fill the overflow/coolant reservoir with the same 50/50 mixture.

  • 3

    Leave the radiator cap off, turn the engine on and let it run until the radiator "burps": You will see the coolant level drop and may see or hear a large air bubble come to the top as the system burps.

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    Keep an eye on the temperature gauge throughout this process.

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    Refill the radiator to the top and coolant reservoir as needed.

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    Put the radiator cap back on.


  • You might have some air inside coolant system, try follow the steps that i just created. if its not work out please relay me back thanks

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    My 98 dodge neon's speedometer started jumping up and down while driving, then the air bag light came on and stays on, next the car started making a puttering noise and sounds kinda muffled when shifting...


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    The heat works fine when the car is idleing/sitting still, but when I start drinving the air becomes & stays cool very quick. What is causing this & what can I do?


    The thermostat is stuck open. The idea behind it is, the thermostat should stay closed until a certain temperature, keeping coolant in the engine where it can absorb heat, which is used to heat the climate air. If the thermostat sticks open, the coolant doesn't absorb much heat because it just flows right through and out of the engine. Sitting still, that's ok because the coolant stays at temperature. When driving, the slipstream air flows through the radiator and cools it way down, and there isn't enough heat left in the coolant to warm the climate air. You'll need to change the thermostat, refill the coolant, and burp the air out of the system, and you'll be good to go.

    Jan 10, 2010 | 1996 Toyota Camry

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    1999 DODGE NEON OVER HEATING ISSUES


    You probably just need to "burp" your cooling system. Run the car (from cold) with the radiator cap open and the heater on full blast. As the engine heats up and the water level goes down, fill it up until it stays full and starts to overflow.

    Regards,
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    Overheating


    Who did the replacement of the parts? Was it done at a shop or at home? Do you know if the cooling system was "burped" after the parts were installed and the coolant was refilled? If you're not sure, burp the radiator. This is easy to do. Jack up the vehicle so that the thermostat is angled upward. Start the car and let it idle until it's 3/4 of the way to overheating, then shut it off and allow it to cool down somewhat. Then pop the cap, let the coolant drain down, and refill it. Restart the vehicle and repeat the process, until the coolant level doesn't drop anymore.

    What you're doing is this - anytime the cooling system is opened up, especially when the fluid is drained and parts are replaced, air gets into the system. When you reassemble and refill with coolant, you trap air bubbles in the system. Since the system is sealed, it operates under pressure. As the car runs, the coolant and the air bubbles are circulated. The bubbles get caught behind the thermostat (if you have it angled upward) and keep it from opening. This causes the engine to heat up to the point of overheating. You want to allow it to get about 3/4 of the way to an overheat so that you know the air bubbles are blocking the thermostat. Shutting down the car stops it from heating up to the point of damage, and allows the system time to cool off so that when you pop the cap, you don't get an explosion of coolant in your face. Once it's cool enough to open the system, you open it and release the pressure. This allows the thermostat to open and bleed the bubbles upward to the open cap, where they "burp" into the air. The space they took up fills with coolant, which is why your coolant level drains down. You top it off and repeat to make sure that all the bubbles are out. You'll know you're in good shape when you let it run and it gets to operating temperature and doesn't overheat anymore. Let it cool that final time, open the cap, and since you have no air pockets left in the system, nothing will burp out and your coolant level won't decrease. Then you should be good to go - put the cap back on and drive away happy.

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