Picked up an early gen 4 GT recently and on getting it home, found that someone has fitted a non-turbo radiator and blocked off the hose from the radiator to turbo tank.
After swearing and ordering a new correct radiator, I started wondering why this hose is needed. Coolant flows from the heads, through the turbo, into the tank, then back out the bottom of the tank to the water pump suction side.
I will replace the radiator with the proper one, but is this likely to have done anything bad? The turbo is original and still in good condition and the car's pretty decent overall with no other evidence of playing around.