Bought my first landy in dec. and it looses water have done roughly 8000 miles . have recently had the head gasket replaced , head skim etc due to the loss of water and the engine hydrolicing on starting 1st thing in the morning.but it is still loosing water ? My dad also has a td5 defender and his has never lost a drop ? any advice appriciated . also there is no trace of a water leek ,having to replace 1 ltr every 300-400 MILES!