I have a recollection that there is a composite gasket for the 300tdi which is an improvement on the old tin ones anybody recommend a manufacturer/brand?. I got the new Disco home safely taking it steady with the filler cap loosened to prevent a pressure build up and no surprise that the possible air lock is certainly a blown head gasket I did come up with a novel way of bleeding the air out tho' top up the header tank and cap it then remove the filler plug from the thermostat housing insert a funnel that is a tight fit an pour in water until the funnel is half full and run the engine until the bubbles cease or in the case of a blown gasket not! . Got my fingers crossed the head is otherwise OK but I have got an engineering option if it needs skimming. Sometimes you smile and wonder if the world has gone mad the number 4 injector spillway banjo is one with 2 pipes one to the return pipe and one to spray derv on the bulkhead anti rust measure ? :-)
Derek Kato 200TDi Disco Miles 300TDi Disco