Hi there, Thanks for the prompt reply, it's a Y-Reg, 1.9Tdi, Ghia, manual, 6 speed, engine code will have to wait until I come home tonight. Mileage is 107K, car is pretty clean and well looked after, bought it about 2 months ago (privatly) and a few days later the turbo went, so had to get that done too. Put some K seal into the coolant reservoir last night and gave it a proper test run on the motor way, again, no apparent overheating according to the gauge (wondering if the engine coolant sensor could be faulty), the bottom of the radiator felt far too cold. also the lower fadiator hose wasn't very hot at all (the top one was hot) and lot's of pressure in the reservoir when I carefully released the pressure cap (level rising and gushing out, then level falling well below minimum). This time there was a lot of 'foam' filling the space above the coolant level (right to the top), not sure if that could have to do with the K seal which I put in... There is also a squeaky/brushy noise coming from the auxiliary belt are(got the belt and tensioner replaced only about a month ago)so was wondering about the waterpump. I am not a mechanic at all but Fraudster seem to be at a loss too (after block and pressure test) and say the next step would be stripping down the engine (taking the cylinder head off at which point I am already looking at