I know it's going to throw out any extra, particularly when it gets hot, do you have any sense of what the resting level is with no leaks? i.e. should I be able to see any when I look it or is there any other way of determining it?
Ok well it's definitely bellow the fins I can see inside- last time I filled it after a few days of driving it took 2 litres to bring it up the the neck. I'm not seeing any obvious wet patches but it must be coming out somewhere. Some of the hose pipes are a bit worn so possibly there. If I'm replacing the hoses are these various hoses on Paddocks essentially what I'm looking for? http://www.paddockspares.com/parts-and-accessories/land-rover-series-2-and-3/cooling.html