HELP my is losin coolant but ive no leaks iiiiii think head gasket is ok and temp gauge as never moved past half way but im losin coolant . bout 8 weeks ago it had to have a new exhaust manifold fitted 4 weeks ago it started splutering and loss of power looked under bonet manifold was glowin red but it seems ok now just loss of coolant plus nastie smell when iput heaters on which stings me eyes and steam from engine , so you see i need help sorry my freelander does its the shi..y 18 petrol thanks