theres ever so slight oil contamanation in the water.

it has all the symptoms of a cracked head/block

just cant beleive that after checking for cracks, warped head etc. that this is what it is. because its not over heating im hoping theres some sort of other answer.. but i dont think there is.

after so much money and work, when you think you've got it, theres always something (big in this case) that takes you back to square one. i feel like poo lol