maybe your head gasket
No. they're dissolved in each other and are quite hard to seperate.
The leak would vary on the size of the hole or seal failure.
If not tight enough to seal it will leak.
There may be a hole in the radiator?
An antifreeze leak.An antifreeze leak.
cap is off
You would have a leak, from either the pipes to the heater matrix (radiator), or the matrix itself.
A leak.
more info. 65;
most likely a blown head gasket.
heater coil
hater core is bad