What is this part - help please

[gottabadf250]

My dad just got a 2010 F350 work truck and I'm not that familar with the 6.4 besides the fact that this thing huals *** stock, I can't imagine a fully tuned truck - unreal!

Anyway, on the top of the engine, right hand side, there is a small reservoir behind the degas bottle. It looks like you can put antifreeze in this small reservoir. I THINK it is the external oil cooler reservoir. Am I correct???

If not - fill me in.

Thanks guys!

[53 willy]

that is for the fuel and vgt cooling system, there is a small cooler to the left of the intercooler that is the cooler for it and there is a small elec pump that is mounted on the fan shroud that turns on when your fuel temp reaches 95 or higher.

[gottabadf250]

Ok.

So does this reservoir hold antifreeze???

And how often do you have to add fluid to the reservoir, just when/if it gets low?

[greasltn]

It takes the same antifreeze as your engine, It also has a sight glass on the front of it so you can see if it is low. You should never have to mess with it unless you open the system.