Thanks Tom, I'm pretty sure that the head gasket is gone as i took it to a coolant specialist who tested it using the blue/yellow dye and i also have no acceleration whatsoever for a 2.5td. Although it starts ok and there is no smoke or water in the oil and i thought at least one of these would be showing. Anyway as I'm now living in Poland and no-one wants to do the job I'm going to try and fix it using Thermagasket from the good ol' US of A. Wish me luck.