might want to check the water pump isnt leaking mate, seems like its going through too much to be the inlet manifold gasket but i cant be certain.

other thing could be the radiator/one of the pipes

 

One thing I will say is try to avoid using water to fill up the header tank.

A mix of coolant and water is specified for a reason. It has a higher boiling point so you wont get any air locks due to the water boiling in the engine creating little pockets of steam. Also coolant protects inside the engine against corrosion.

With the coolant leak, I would look on the back of the engine and the sump for any white/pink stains where coolant has been leaking. You could have a leaking water pump, leaking thermostat or leaking coolant rail.

Hard to tell without getting the car up on som stands and having a good look around underneath.

 

Hi, it's probably a leak from the waterpump... it's the most common weak point on the cooling system, it would be the first thing to check... some waterpumps on the later models have an evaporation chamber fitted so you won't see a visible leak from it but there should be signs of dry coolant stains around that area if it is that... x

 

thanks chaps, I'll have a poke around under the bonnet and see what I can find :broon:

cheers
Ben