[chippy]

have you tried bleeding it

 

[chippy]

that noise is not the water but air pockets, not good mate,,
dont drive till fixed, sounds nearly empty of water,

 

[chippy]

well, first i would try bleeding it, wait till fully warmed up, heating on full power full heat,bleed through the little bolt at front of engine near fuel rail,
if that dont work ide be looking at water pump, good luck mate...

 

[chippy]

more money lol