GSL-SE engine. From what I can tell the flow went from the nipple on the rear iron through the intake and to the nipple on the water pump housing. I will be running a S4 intake with no intent on running coolant through the manifold. I am hoping that I can use this line for a S5 HT18 turbo. Looks like on the TII the turbo is fed from the same location on the rear iron / manifold/ turbo/ lower water pump housing. After inspection it would seem the coolant coming off the turbo would be recirculated through the engine without the benefit of going through the radiator. But, as the engine coolant is running through the radiator anyways, does this really effect the operating temperature in any meaningful way?

 

Yes, those are the two points to use for turbo coolant lines.

 

Thank you. I would hate to have twoptressure sides an not a suction side of the water pump.