2008 f350, 6.4l.

Lower hose from the reservoir to the water pump ( I'm assuming) bolts in (1 bolt) right above the lower radiator hose connection.

Leaking out of the reservoir hose mount. I'm assuming there's an o-ring on the pipe. Anybody happen to have the size of the oring? Hose assy is dry but it's coming from the seam. With only 1 bolt, can't see a gasket so...

I got O-rings at work.

If need be, I'll tear it apart and bring old one into work but would like to do it all in 1 night. Luckily if it's down a day, it's no big deal. Trying not to though