ok so really wasn't satisfied with my problem being a brand new water pump so I ran her up to temperature nice and warm till she started overheating again and did another compression test to find results were quite different over the the 4 cylinders number 1 was about 137 and cylinder 4 was around the 150 mark so took rad cap off to find shes under pressure, but a whole lot of bubbles coming up as well I may be wrong but I think I have a cracked head what do you guys think ? videos added --> http://www.youtube.com/watch?v=BjtFncVTOEQ. http://youtu.be/6QTz3cZadSc