Koyo Radiator Questions R32 GTR

[powerdbygarrett]

Koyo Radiator Questions R32 GTR

I received my koyo 53mm radiator, this one to be exact: http://www.rawbrokerage.com/koyo-53mm-aluminum-racing-radiator-for-nissan-skyline-gtr-r32/

Looking at it, i am slightly confused. There are three ports:

1: Small port, looks like 1/8 npt, it came with a blocking screw already in, with a ton of teflon tape, I unscrewed it to make sure it was a npt port but the sender from the autometer gauges does not fit. So whats this port for?

2: Large port, looks like it would house an adapter for a gauge sender. both adapters from the gauges do not fit. Did not come blocked off. Is this where the stock sender for the car goes?

3. That's a drain plug, I'm not that crazy. lol!

 

Thanks in advance

[r32-25t]

The one right next to the bottom radiator hose is for the thermo fan sensor and the one on the other side is the drain plug

[powerdbygarrett]

The one right next to the bottom radiator hose is for the thermo fan sensor and the one on the other side is the drain plug

Thermo fan switch, got it thanks.
lol I knew #3 was the drain plug.
Now what about number 1?

[r32-25t]

I didnt have it on mine but I'd be using it for if you had a header tank fitted you plumb in to that hole 

[89CAL]

Maybe it is for an additional temp sensor? Just not the one you have apparently [emoji14]

Or as above, might be for a header tank