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Question:

when i refill coolant do i pour where the radiator cap is or the big tube for coolant?

does it matter where you pur the fluid and how much should be poured in my vanhave a radiator caop and then like a long plastic tube that goes down to the engine and says coolant on it...where do i pour the antifreeze??

Answer:

Fill-up the plastic container The plastic container that connects to your radiator is the extra fluid. The level of fluid in that container will rise and lower as the heat of the fluid changes, but should be at the full mark when your car has not been running. If you are loosing fluid due to a leak and it gets too low fill it up with water. Radiator Coolant is used particularly in places were its cold, because its much harder to freeze. But if you run out, your car could over heat.
when the engine is cold you can fill it at the radiator, then fill the reservoir between the add and full mark, but if it,s hot don,t take the cap off or you will get scalded, just fill the reservoir and it will suck up into the radiator.
Better to pour into radiator, carefully. The other container is usually a spillover reservoir.
By the looks of all your questions recently you really seem to be doubting yourself with answers. So quite frankly, I would get someone to help you look into your cooling system problems if you are running hot. Or, stop by a good reputable repair shop for a coolant top-off and maybe a diagnosis of any overheating you may have. Good Luck to you..
Make absolutely sure you replace the radiator cap with an AC Delco closed system radiator cap. The correct part # for this cap is listed in your glove compartment manual in the specification pages. A closed system radiator cap has a large rubber gasket covering the inverted shell spring facing you as you look inside it. From your description the gasket is missing or the pressure rating is incorrect. Also, make sure the hose that run from the coolant recovery tank to the the small outlet at the top of the cap neck is free and clear. This allows the the radiator to push coolant back inside the reservoir when the pressure exceeds the pressure rating on top of the radiator cap. As the engine and cooling system looses heat when you turn off the motor a secondary check valve in the center of the radiator cap opens allowing the coolant to be pulled under vacuum back into the radiator, block and cylinder heads. The whole plan of this system is to evacuate all air bubbles from the coolant making the system more efficient.

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