Dan3312

Ok, I did try searching for the answer to this question and I have seen a few flow charts but nothing that has erased all doubt.

I am trying to set up my turbo for Thermal Siphoning as Garrett states for the water cooled turbos.

What I need to know is which line is the feed line and which is the return line for coolant on an S13 SR20DET. Is it the line that splits off of the heater core line at the back of the head or is it the hole near the front of the engine?

Has anyone set up a top mount set up with Thermal siphoning in mind? If the feed line is the one coming from the core heater line this will make things difficult to route and it is already placed so high up.

Thanks in advance for any and all insight on this subject.