hi i need help again fitted 2l engine and got running up today only to see temp gauge go through roof again then to top it of fan switch not working. wired fan up permanent and it hovered around 90,not running with a thermostat in as no heater,the question is has any body had this problem before? i got a brand new rad fitted 35mm core from a polo could the water flow be too fast for the rad? it has got me baffled this one can any one help with any answers please?