Now mate try jetwashing thro the water in the car bleed the radiator,then refill it up and start the car and get all the air locks out also fit a override switch in the car for the fan.and if thats your first r5 turbo u have owned then let the car warm up for 2mins before you drive it anywhere!! as the turbo will go bang after a while! and another 3 things u might want to invest in is a grade a gasket set from
http://www.k-tecracing.com/index.asp ,and a turbo timer to cold the turbo down after running it, and to keep the turbo longer,a in car boost valve kit so u can lower the rate of the turbo and higher it when u need it hope this help you out if you need any more info give me a ring on 07788992309
Daz