i had my motor rebuilt a while ago, and the coolant system is fine but im doing a flush soon.
I noticed that when i always top the overflow to the max line, when i go for a drive it will always overflow the bottle, then suck back what it needs into the radiator leaving it empty.
I have no leaks in the system, and the cooling is perfect in the car, its just the overflow never likes to be full, just empty. The car has a new clutch fan, a new water pump was put in when the motor was built too. Basically the coolant system is 100%, except it doesnt like any water in the overflow.
Where does other people's levels sit in the overflow, and would there be anything wrong with the coolant system?
thanks.