Cheers Dave, will have a look.

Yea thats what im thinkin Daz, after its had time to warm up the level rises in the header tank and even with the cap on there so much pressure its overflowing. Which 1 u mean by upper most?! the turbo feed one? if so thats disconnected at mo. Faye pointed something out, my heater aint working, even tho the fuse is ok, and if its blocked there there will be a fair bit of back pressure poss causing the problem if the water aint getting round it!!! Gonna bypass the heater matrix so the water goes straight to the oil cooler and see what happens.