Hello all. My neighbour, who I help quite often, has a problem. His Transit 3.2L 5 cyl 2008 is loosing coolant, mostly on runs over 50 miles and up to 3 pints.
There is no visible sign of the leak looking under the bonnet. There does not seem to be any water or steam coming out of the exhaust although this may happen when pulling hard when hot.
When you rev the engine coolant can be seen returning to header tank. No sign of oil in water or oil contamination. The cap is new.
Any suggestions welcome.