I was running my car on the track today for the first time its a sierra 4x4 running 400bhp the car ran great but the header tank cap was leaking due to the extra heat caused by the turbo and i was wondering would a turbo cooler help this and does any one use them as the engine temp stayed about 85 degs but the cap was leaking and causing the coolant to leak out and i thought after seeing them in some magazines a seperate radiator just to cool the turbo water before entering the expansion bottle i thought i would ask to see what others do about this problem any ideas please