instead of putting fluids in over flow put it directly in the radiator. take cap off radiator start car and wait like 5 minutes then add to radiator until full.
OR on the top of the water pump there will be a brass fitting with a small brass bolt in it, loosen the bolt to allow air to be pushed out of the cooling system as you add coolant, otherwise when the air in the system gets hot it expands and pushes the coolant back out and the car overheats. when coolant starts coming out tighten the bolt again and run it up to operating temp.
no it doesnt........the overflow container is just there to catch the extra coolant.......it has nothing to do with the heating system
You could have a bad water pump causing no coolant flow, inoperable radiator fans, a coolant leak,............
The lower radiator hose is the intake to the water pump, the coolant has already passed thru the radiator and has cooled down.
Open the hood on your Sunfire. Remove the radiator cap from the radiator overflow bottle. Turn the engine on in the Sunfire, and let the engine run for no less than 15 minutes. Set the dials on the heater control panel to full fan speed, full heat, and front defrost positions. This will speed up the processes of heating the engine to full temperature. Removing the radiator cap and performing these procedures will allow the pressure in the engine to build up. As the pressure gradually increases, the weight of the coolant will force air bubbles out through the radiator overflow bottle hole. This process is called bleeding the cooling system. Turn the engine off when you notice that there are no more bubbles coming from the radiator overflow. Top off the radiator overflow bottle with fresh coolant. Use 50/50 diluted, universal coolant to fill the overflow. Replace the radiator cap when the reservoir is at the "Full" mark. http://www.ehow.com/how_7734216_bleed-system-Pontiac-sunfire-22l.HTML
A lot of heat is gonna build up when there is no air going through the radiator fins. This is one way that the cars vents some of this pressure. It is possible that it had too much coolant in it and the overflow tank filled up and pushed the rest out the overfrlow tube. It is normal for coolant to go back and forth between the overflow tank and the radiator. Just keep an eye on it and if it is not over heating then I wouldn't worry about it. Good luck.
try taking out the thermostat and have you put to much oil and coolant in the radiator
if it is losing it thru the overflow pipe you need a new radiator cap
There is a petcock on the bottom corner of the passenger side on the radiator. If you turn the petcock and open the valve the coolant will drain out of the drain hole on the bottom passenger side of the radiator. Make sure you have a big bucket to catch the coolant in or you will be making a huge mess. The proper way to fill the radiator is to take the upper radiator hose off and pour the coolant in until the radiator is full. Then replace the radiator hose and fill the overflow to the correct level. Start the car and let it run till it is hot and the fans kick on (should be about 220F ~ 230F). Turn the car off and let it cool, then top off the overflow bottle. You should be fine to drive the car at this point, but after heating up the car again you may need to top it off again so keep some coolant handy. The cobalt uses dexcool.
It's probably the radiator. Make sure there's enough coolant in the radiator.
Low coolant? Water pump not circulating coolant? System air bound? cooling fans not working? Defective radiator cap? Bad temperature gauge?
The most likely cause of this is a blown head gasket dumping oil back into the coolant passages. The oil will mix with the glycol in the antifreeze and make a thick yellow paste. It is very important to flush the cooling system after the repair or this sludge will cause heating problems.
Low coolant? Cooling fan not working? Radiator plugged or restricted? Water pump not circulating coolant? System air bound? Defective radiator cap?
Coolant leak, plugged radiator, failed water pump, inoperative fan.
Make sure you have enough coolant in your radiator. The radiator is the thing in the very front of the car, the very front of the under the hood area.
fan not working or coolant level too low or fins on radiator loose
Low coolant? Radiator plugged or restricted? Water pump not circulating coolant? Cooling fan not working? Thermostat not opening? Cooling system airbound?
yes, or should i say its supposed to. If your cars cooling system uses a expansion tank you have a problem on your hands, coolant should be flowing through the expansion tank on a regular basis(when the thermostat opens or closes). if you have a overflow tank, coolant flows in or out as needed by the systems heating and cooling cycles. If the radiator is low top it off then fill the resivor to the minimum cold level(shown on side of tank). But if your coolant levels are low you should ask yourself where is it going? if you cant find a external leak (around waterpump,bottem of radiator or hoses), then you might have an internal leak.
Originally this car had R12 refrigerant. It may have since been updated to accept R134a. The coolant/radiator system is not part of the air conditioning system. But the hot antifreeze-coolant is used for the heating system...
If it is leaking trans fluid into the coolant it can cause overheating.
Stuck closed thermostat, cracked head, bad head gasket, low on coolant are some possiblities.
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There are two possibilities, one it is most likely the automatic transmission cooler( in the radiator) is leaking transmission fluid. The other, engine is oil entering the cooling system through a leaking headgasket, cracked cylinderhead or engine block.Keep in mind that the engine oil pressure( normally) is allways higher than that of the coolant system , when engine is running.It is rare but possible that engine oil @ say 40 p.s.i. is entering the coolant system, but when the engine is shut off the coolant system pressure is not high enough to leak into the engine oil .It is not uncommon for(in radiator) transmission coolers to leak oil into the coolant system.
You have two fans, one turns on when the AC is running. The other fan turns on when the engine coolant temp has reached aprox 210 degrees. The coolant temp sensor/switch determines that. So, it could be either the coolant fan motor or the coolant fan temp sensor or the coolant fan relay or the coolant fuse/circuit breaker is bad. I am assuming the head and head gasket is okay.
Probably not. There really is no way to increase the flow in the radiator, but when it decreases the coolant does not get cooled down as quickly thus the coolant gets even hotter. If the flow in the radiator decreases too much you could have an engine over heat which is bad news bears when it comes to the lifetime of your engine.
check your coolant if it low refill it. check your coolant bottle and radiator for leaks if all is still over heating..sell it you have blown heads