If you are pouring it directly into the plastic antifreeze reservoir, it most likely has a crack in it.
The bigger your car, the more coolant you need to put in. The bigger your engine and car, the more coolant you need
No , when the engine is cool
Virtually all automobiles have a drain plus (petcock) on the bottom of the radiator for the purpose of draining coolant. Your car should have that on the inside of the radiator, on the botom, on the driver side of the car.
In the top of the radiator but be sure you've put all the pipes back on
put coolant into my over flow car was running hot and the coolant erupted like a volcano on the side of the over flow
When the car is cold the thermostat is closed. When the thermostat is closed the coolant does not circulate or get in to the engine block.
In the coolant reservoir when the engine is cool.
Clean water should be used and mixed with the proper coolant for your car.
After coolant is added run vehicle to normal operating temperature and re-check coolant level
If I were wanting to remove the coolant without draining the whole system which would do the trick, I would siphone the coolant out with a small hose like cleaning out an aquarium. Put the hose in the coolant reservoir and use a apparadius to start the sucking and eventual withdrawal of the liquid. Ken
It is possible to put water only in the reservoir for coolant on a car. However, this should only be a temporary fix until it can be repaired by a mechanic.
If your car is leaking coolant get it fixed and put in the recomended coolant for your car. You should locate that info in the manual, also putting water in the winter is a bad idea since the water could freeze causing engine damage. I supposed you might be able to run it for a while in the summer with just water but get the leak fixed and put in the recomended antifreeze/coolant