Each manufacturing company and /or car, can have a particular amount recommended. That said, when I doubt, I always mixed mine 50/50 or close.. ie... 8 qt.
it could be that you've put too much coolant to percentage of water in
It is usually marked, but halfway should be good.
Most likely because you have added to much coolant when it was cold.
Yes , when the engine is cold the coolant should be up to the cold fill mark
2 to 3 volts.
You should use a gallon of coolant.
about 1 gallon your owners manuel should have this info
Depending on the vehicle, there should be a fill line on the over-flow resevore
Fill it up to the full mark.
engine US measure metric measure 4.7 liter 17qt 16L 5.2 liter 14.3qt 13.5L 5.9 liter 14.3qt 13.5L
How much acid and chlorine should be added to a 5000 liter to make 5 ppm solution
It should be up to the cold mark ( at least that's the way it is on my vehicle )