how often do you need to top up water, I am finding I need to do after some hot city running, water is going somewhere and not clear where.
checked hoses etc. engine oil is fine, new radiator so perhaps the a seal around the water pump or maybe thermostat housing - are there any known issues ?
very hard to find especially if it only happens under pressure
I do get water from the header overflow when it is really hot
is it common to have to top up water near enough weekly (depending usage)