Thanks for the replies lads maybe I need to stop being so paranoid about things, have said this before in another post: Driving normal temps on the water gauge are around 82-86 degrees, I know that's normal, when in heavy traffic my water gauge goes to 99-100 degrees then the fan comes on and it will drop back down to about 92-93 degrees, The water gauge sensor is on the top rad hose, with adaptor, now I'm gonna be putting a twin core half rad on ASAP (have all bits already) I suppose I would like to just have my fan come on alittle earlier or is the top rad hose where it's at its hottest point? Thanks lads pat