Hi all , I have a coolant loss that is starting to bug me . I had my waterpump changed not soo long ago . I have a feeling its my coolant tank cap because it becomes loose not excessively and i can see condensation bubbles and after a long drive hear a sort of hissing noise as so its loosing pressure . I can also smell coolant after a long drive there is a few white stuff floating on top of the water but not alot at all Could getting a new coolant cap sort it or Or could it be something worse . Any advise would be appreciated thanks all