Why is your rover 400 throwing water out of the header tank?

If your Rover 400 is throwing water out of the header tank, it could be due to several reasons. A common cause is overheating, which can lead to excess pressure in the cooling system, forcing coolant out. Other possibilities include a faulty radiator cap, a blown head gasket, or a blockage in the cooling system. It's essential to diagnose the issue promptly to avoid potential engine damage.