Terribly sorry if I upset anyone. And thank you 300tdistu for your answer. Further info which I'm sorry I didn't reveal at first follows. The vehicle is a Discovery from 1996 so its a 300tdi which I haven't had any experience of before. Therefore I don't know what fittings are different from any other Discovery. Yes it has an expansion tank and it was easier to write radiator and it did get filled. There is oil in the engine as shown on the dip stick and of course the expansion tank is filled to the mark, now. Yes I bought it privately. Many do. I had a thought that someone among you would have a list of what in the engine there was to check. Possibly something from the manufacturer. Thank you.