Sound like a HGF to anyone?
Car loses a litre of water every 15miles or so, also the header tank does have a funny whiff to it.
No other signs at all, no oil in anything, no water in anything, no big plumes of white smoke from the exhaust. I have checked everywhere for a leak, but can't see a thing.
Its 2wd with a 200 b/e, group A gasket that is only 2000miles old, only running stage 1.