Question about 2002 Dodge Neon

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Overheating my 2002 dodge neon is overheating I have replaced thermostat and it still is overheating. it overheats to the point that the coolant bubbles in the overflow jug what do you believe it is?

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  • Anonymous Oct 22, 2008

    when i am driving with a lot of traffic the overheating appears.

    when im driving qhith son grade of inclination on the road, like a little mountain, overheatinh appears too.

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Water pump plug heater core radater plug up or head gasket

Posted on Oct 19, 2008

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Sounds like a head gasket. make sure the radiator is full of coolant and the fan comes on

Posted on Oct 16, 2008

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2001 3.5 overheating stuck thermostats


you have to replace thermostat.check level coolant.Stuck in close.

Feb 24, 2013 | Dodge Intrepid Cars & Trucks

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How to burp your cooling system after replacing parts (works for ALL cars)


There's a common misconception that if part of a car's cooling system fails, the failing part can be replaced, the system closed up, fluid topped off, and the car will be ready to go. Many people have overheating problems, replace the offending component (thermostat, radiator, etc), top off the fluid, and then wonder why they still overheat.

This is because when the cooling system (which operates as a sealed system) is opened up and new components are installed, air bubbles become trapped in the system when it's reassembled. Coolant is added, but the bubbles displace some of the system's volume and become trapped in the cooling system.

The way to alleviate the problem is to burp the cooling system. It's easy to do, and only takes half an hour to an hour. It can be done at home very easily.

The first step is to reassemble the system after you replace whatever components are failing. Tighten all clamps, connect all hoses, and then fill the radiator or coolant holding tank, and fill the overflow reservoir to the indicated level (there's a small hose that typically runs from the radiator flange where the cap is positioned, over to the overflow container). Find the thermostat (trace the lower radiator hose back to the engine from the radiator - where it attaches to the engine is either exactly where, or very near, the location of the thermostat). Jack up the car so that the thermostat is pointed upward (the hose would be attaching at a downward angle). Now start the car.

You jack it up in this way so that the thermostat points upward. The thermostat will open downward in this position. Watch your temperature gauge as it rises to, and then beyond, the normal operating temperature. If it is rising very slowly, you can rev the engine, or hold it at 2000 RPM or so, to help build the heat. Eventually the engine will begin to heat up beyond normal and the gauge will climb. This is what you want. Allow it to climb to somewhere between 2/3 and 3/4 of the way to a full overheat, and then shut the engine off. Allow it to cool, and then CAREFULLY open the radiator cap. You'll hear a purge of pressure, and will probably see bubbling in the overflow container. Check the level of the coolant in the overflow and the radiator, top them off as needed, and repeat this procedure. Keep doing so until the car no longer overheats. Now, take it for a drive around the block a few times, and see if it overheats then (sometimes putting the engine under load will cause it to overheat even when it won't while sitting in the driveway). If it does not overheat, you are done. If it does, pull over, turn off the engine, and turn on the heat full blast (this will extract heat from the engine). Get the car home and burp it again.

Why are you doing this? Here's why. Those air bubbles in the system that I mentioned are the root of your evil. When you start the engine, the water pump spins and circulates the coolant (and air bubbles) throughout the engine. At some point, those bubbles come to the thermostat, which stays closed until the car gets to a certain temperature, at which point it opens and allows the coolant to go to the radiator to cool off. When the air bubbles get to the closed thermostat, they get stuck. In turn, having the bubbles pinned against the back side of the thermostat keeps it from opening since the system is pressurized and the thermostat can't open against the pressure of the bubbles. This is why the car begins to overheat. By waiting until you are most of the way to a full overheat, you get as many bubbles stuck there as possible.

Once you allow the car to cool enough that the coolant won't explode out of the radiator when you open the cap, you can open it. This relieves the pressure in the cooling system and allows the thermostat to open. The bubbles travel through the thermostat and hose to the radiator, burble their way to the top, and "burp" out of the cap's opening. With the bubbles out, the coolant level drops some (which is why the coolant as to be topped off), and you repeat the process since the coolant doesn't always follow the same pathway. You want to be sure that all the bubbles are removed from the system, so you do this a few times.

Hopefully this will help you with overheating problems and with diagnosing future issues. I know this is listed under Chevy cars, but that is only because I had to select something, and those are commonly owned cars. This process is important on ANY car, regardless of manufacturer or engine.

on Dec 03, 2009 | Chevrolet Blazer Cars & Trucks

2 Answers

2002 ford windstar sel overheating


first check coolant level in radiator coolant level sound low.if coolant overflow jug empty.coolant sysyem low, when add coolant to coolant overflow jug coolant level should stay at full cold mark.if coolant level okay,engine overheat while sitting or moving in slow traffic either coolant fan relay or fuse could be bad.or engine coolant temperature sensor could be bad. coolant sensor turn on cooling fan at certain temperature.hot wire check to make sure cooling fan motor not bad or short in wires.if all is good have pcm check it controls fan relay to through the coolant temperature sensor signal when coolant get hot.

Nov 04, 2012 | 2002 Ford Windstar

1 Answer

Jacking


engine running too hot.check coolant level, should be 50/50 antifreeze and water.replace thermostat and radiator pressure cap.check antifreeze level in the radiator,coolant level should be just below radiator cap, add coolant to overflow jug,should alway be at the full cold mark.empty coolant overflow jug will allow air be drawed in the coolant system causing overheating.if overheating happens when coming to a long stop.could have faulty engine coolant temperature sensor or bad coolant fan fuse or relay.

Sep 02, 2012 | 2002 Kia Optima

1 Answer

The car is overheating but ck eng light not coming on. The transmission catches hard intermittently. The rpms seem to be running higher than normal.


check for low coolant level.check coolant overflow jug if it is empty, more likely air is in the coolant system.add more coolant to overflow jug until coolant level stay at cold full mark,dont over fill coolant overflow jug.if all is good, to be on the safe side, replace radiator cap,replace thermostat,if your engine overheat at a long slow driving traffic.or long stop idling, if cooling fan dont turn on more likely engine coolant temperature sensor could be faulty.

Jul 28, 2012 | 1999 Pontiac Sunfire

1 Answer

No my alero is overheating. I have replaced the thermostat and waterpump and put a new cap on reservior and im losing coolant out the overflow


YOU NEED BLEED AIR OUT THE COOLING SYSTEM.WAIT TO ENGINE COOL DOWN.YOUR VECHICLE YOU HAVE TO POUR COOLANT IN THE COOLANT OVERFLOW JUG UNTIL COOLANT LEVEL STAY AT THE FULL COLD MARK.THEN START ENGINE LET IT IDLE A FEW MINUTES WATCH COOLANT IN THE OVERFLOW JUG WHEN IT DROPS ADD MORE COOLANT UNTIL COOLANT LEVEL STAY AT FULL COLD MARK.WHEN COOLANT LEVEL STOP DROPPING IN OVERFLOW JUG.SCREW RADIATOR CAP BACK ON OVERFLOW JUG WATCH ENGINE COOLANT TEMPERATURE GAUGE AS COOLANT TEMPERATURE START CLIMBING TURN OFF ENGINE LET IT SET A WHILE KEEP FROM GETTING SCALDED.TAKE LARGE RAG PLACE OVER COOLANT OVERFLOW JUG CAP SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL PRESSURE RELEASE.REMOVE OVER FLOW JUG CAP.ADD MORE COOLANT UNTIL COOLANT LEVEL AT THE FUL COLD MARK ON THE OVERFLOW JUG.THEN SCREW CAP BACK ON THE OVERFLOW JUG.START ENGINE LET IT IDLE AGAIN WATCH ENGINE COOLANT TEMPERATURE GAUGE WHEN TEMPERATURE GAUGE START CLIMBING.TURN OFF ENGINE WAIT A WHILE.CHECK COOLANT LEVEL IN THE OVER FLOW JUG.DO THIS PROCEDURE UNTIL THE COOLANT LEVEL IN THE COOLANT OVERFLOW JUG STOP DROPPING AND STAY AT FULL COLD MARK,WHEN THE TOP RADIATOR HOSE GET HOT THERMOSTAT OPENING AIR IS OUT THE COOLANT SYSTEM. WHEN ENGINE COOLS DOWN.CHECK COOLANT OVERFLOW JUG COOLANT MUST BE IN THE COOLANT OVER FLOW JUG AT THE FULL COLD MARK WHEN ENGINE COLD. DONT .DONT OVERFILL COOLANT OVERFLOW JUG.KEEP COOLANT IN THE OVERFLOW JUG IF YOU LET COOLANT OVERFLOW JUG RUN DRY AIR WILL BE DRAW IN COOLANT SYSTEM CAUSE ENGINE TO OVERHEAT.

Aug 12, 2011 | 1999 Oldsmobile Alero

3 Answers

I replaced my radiator on my 2004 with a 2.2 and it seems like the thermostat is not opening. It can not get the air out. It seem to just to over heat and push the coolant out. Randy


REPLACE THERMOSTAT IF TOP COOLANT COOLANT HOSE GOING TO RADIATOR IS HOT TO TOUCH THERMOSTAT OPEN. TO BLEED COOLANT SYSTEM FIRST YOU NEED TO ADD COOLANT TO THE COOLANT OVER FLOW JUG UNTIL COOLANT LEVEL STOP DROPPING AND STAY AT FULL COLD MARK.WAIT 3 MINUTES IF COOLANT DROPS ADD MORE COOLANT UNTIL COOLANT STAY AT FULL COLD MARK.WITH RADIATOR OVER CAP OFF CRANK ENGINE FOR MINUTE WATCH COOLANT LEVEL AT OVERFLOW JUG.IF COOLANT DROPS ADD MORE COOLANT IN THE OVERFLOW JUG.WHEN COOLANT LEVEL STOP DROPPING IN OVERFLOW JUG.SCREW BACK ON THE RADIATOR CAP TO OVERFLOW JUG.WHILE ENGINE IDLING WATCH TEMPERATURE GAUGE WHEN TEMPERATURE START CLIMBING TURN OFF ENGINE WAIT A WHILE KEEP FROM GETTING SCALDED.WHEN COOLANT COOL DOWN SOME. PLACE A LARGE RAG OVER THE COOLANT OVERFLOW JUG OPEN CAP LITTLE AT A TIME UNTIL PRESSURE RELEASED, THEN REMOVE CAP ADD MORE COOLANT IN THE OVERFLOW JUG TO THE FULL COLD MARK.THEN REPEAT THE PROCESS SCREW BACK ON THE COOLANT OVERFLOW RADIATOR PRESSURE CAP.THEN START ENGINE WATCH TEMPERATURE GAUGE WATCH COOLANT TEMPERATURE GAUGE WHEN COOLANT TEMPERATURE START RISING TURN OFF ENGINE AGAIN WAIT UNTIL ENGINE COOL DOWN ENOUGH TO KEEP FROM GETTING SCALDED TAKE PLACE LARGE RAG OVER RADIATOR CAP WHICH IS THE COOLANT OVERFLOW JUG CAP OPEN CAP LITTLE AT A TIME UNTIL PRESSURE RELEASED ADD COOLANT UNTIL AT FULL COLD MARK. WHEN YOUR COOLANT LEVEL STOP DROPPING.AND TOP RADIATOR HOSE VERY HOT THERMOSTAT OPEN AND AIR IS OUT THE COOLANT SYSTEM. MAKE SURE YOUR COOLANT OVERFLOW JUG HAS COOLANT IN IT,WHEN ENGINE COOL DOWN CHECK COOLANT OVERFLOW JUG KEEP COOLANT LEVEL AT FULL COLD MARK.BECAUSE IF OVERFLOW JUG IS EMPTY THATS A SIGN RADIATOR COOLANT LEVEL LOW.WHEN OVERFLOW JUG EMPTY IT WILL ALLOW AIR GET IN THE COOLANT SYSTEM AND CAUSE CAR TO OVERHEAT.WHEN REPLACING THERMOSTAT ALSO REPLACE THE RADIATOR CAP ON THE COOLANT OVERFLOW JUG.

Aug 09, 2011 | 2004 Oldsmobile Alero

1 Answer

Need to know if i need to bleed the cooling system, after installing the radiator?


ADD COOLANT IN THE COOLANT OVERFLOW JUG UNTIL COOLANT LEVEL STOP DROPPING AND COOLANT LEVEL STAY AT THE FULL COLD MARK.PLACE COOLANT OVERFLOW JUG CAP BACK ON JUG.CRANK VECHICLE UNTIL ENGINE START WARMING UP. STOP ENGINE WAIT FOR A WHILE UNTIL COOLANT COOL DOWN TO KEEP FROM GETTING SCALDED. USE A LARGE RAG OVER THE OVERFLOW JUG CAP OPEN OVERFLOW JUG CAP A LITTLE AT A TIME REMOVE OVERJUG CAP CHECK COOLANT LEVEL ADD MORE. COOLANT IN THE OVERFLOW JUG.THEN START VECHICLE AGAIN.LET ENGINE IDLE UNTIL TOP RADIATOR GET HOT.THEN THERMOSTAT WILL BE OPEN.WHILE ENGINE IDLING WATCH THE TEMPERATURE GAUGE IN VECHICLE IF TEMPERATURE GAUGE START CLIMBING IN THE HOT ZONE.TURN OFF VECHICLE LET IT SET A WHILE THEN USE LARGE RAG REMOVE OVERFLOW JUG CAP.ADD MORE COOLANT, PLACE CAP BACK ON START VECHICLE AGAIN KEEP DOING THIS PROCEDURE UNTIL TEMPERATURE STOP CLIMBING HOT ZONE.AND WHEN COOLANT LEVEL STOP DROPPING IN THE COOLANT OVERFLOW JUG.AIR IS OUT THE SYSTEM, BUT KEEP COOLANT LEVEL IN THE COOLANT OVERFLOW JUG AT THE FULL COLD MARK.DONT OVERFILL.DONT LET COOLANT OVERFLOW JUG RUN DRY IF SO AIR WILL ENTER COOLANT SYSTEM BECAUSE COOLANT LEVEL WILL BE LOW ENGINE WILL START OVERHEATING.

Jul 24, 2011 | 2006 Dodge Grand Caravan

1 Answer

Overheating


CAR OVERHEATING FIRST CHECK FOR LOW COOLANT IN THE RADIATOR COOLANT OVERFLOW JUG.IF COOLANT LEVEL IN OVERFLOW JUG LOW REFILL ADD COOLANT BACK TO THE FULL COLD MARK.PUT RADAITOR CAP ON COOLANT OVERFLOW JUG START ENGINE LET IT IDLE UNTIL IT OPERATING TEMPERATURE.MAKE SURE TOP RADIATOR HOSE GETTING HOT WHILE ENGINE WARM UP.IF TOP RADIATOR HOSE DONT GET HOT WHILE ENGINE IDLING YOUR THERMOSTAT COULD BE STUCK CLOSE CAUSING CAR TO OVERHEAT.IF TOP HOSE IS GETTING HOT.CHECK FOR COOLANT LEAKS CHECK TOP RADIATOR HOSE AND BOTTOM RADIATOR HOSE FOR LEAKS.CHECK FOR LEAKS AT THE RADIATOR CORES AND PLASTIC SIDE CONTAINERS.IF ALL IS GOOD ENGINE OVERHEATING WHILE IN A LONG TRAFFIC LINE, COOLANT FANS NOT COMING ON.COULD HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR BLOWN COOLING FAN FUSE OR RELAY.COULD HAVE PCM FAULT.MAKE COOLING FAN ELECTRICAL CONNECTORS AND WIRING NOT DAMAGE OR BROKEN.

Jul 17, 2011 | 1999 Oldsmobile Alero

2 Answers

Overheats when not moving blowing out of the coolent jug


Most likely cause is a stuck thermostat, blocking coolant from circulating through the engine. When it heats up, it finds the path of least resistence, being your coolant reservoir. Replacing your thermostat should solve your problem. Best of luck.
Greg

Jul 04, 2009 | 1997 Dodge Neon

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