it could be that it's a little over full
You can operate a car without an expansion tank but it will most likely drip engine coolant onto the road when the motor heats up.
As the engine coolant heats up, the coolant expands, so the coolant needs a reservoir or expansion tank to flow in and out of as needed.
Yes it could
above 200 degrees when the car is running
Yes, a lot of in-tank fuel pumps are cooled by the fuel in the tank and running the tank dry can destroy the in-tank fuel pump. A lot of discussions about this recommend not running the tank dry for that reason.
it will feel as if you are running out of gas, the car will start sputtering.
i take it you are talking bout expansion tank on a/c this is evaporation and is common on all vehicles if you are talking bout expansion tank on radiator, you have either got to much coolant in radiator,(check level when cold) or you have an air lock in the cooling system and need the system bled to remove air
Assuming that you add petrol to your tank, either you're driving it farther than it can go on the amount of petrol in your tank, or there is a leak from the tank.
Have you checked the water level in the coolant expansion tank, if low this will not heat up the car. If level ok maybe thermostat is stuck Have you checked the water level in the coolant expansion tank, if low this will not heat up the car. If level ok maybe thermostat is stuck
You have exhausted fuel from tank? Try to change fuel filter if fitted. Possible contaminant was in tank (water, solids) Try a cup of metholated spirit in tank water will be displaced or fuel filter for solids.
motor conected to fuel tank
your head could be cracked you will not notice the water lose when you car is running see if the water is coming out of the tale pipe