New radiator question

[abe_lugo]

I did get to install a new radiator, also did a flush and 160 tstat. Did the coolant.  Car ran cool up to Vegas.  Getting back it also ran cool about 179-180.  Only a bit 190 a few streets from home.
One thing I noticed this morning  was a small leak and chased it down to the heater hose. 

Then I decided to open up the radiator cap and it had some pressure all night. Thus the loosest hose might gotten the weep.  The current cap is 13lbs.  Thoughts.  I'm going to get a new cap anyhow. 
Anything else I should be checking. 

When I initially added the radiator I filled with all water drove to check for any leaks.   
Next day drained it and added coolant and water. 

The only thing I didn't change was the cap.

That was the only odd thing   Everything else went great on the trip.

[RICH MUISE]

I keep my coolant about an inch or more below the top in my ACC alum. radiator. Leaves room for expansion. I also use distilled water (Walmart), and a sacrificial anode. I've never had anything but clear green coolant in the radiator even after years.
Kept pressure all night? I don't think I've ever had that happen on any car. LOL, my 4.6 has so many coolant hoses something is always seeping.

[abe_lugo]

It seeped a little from one of the coolant hose connections.
I just never had that happen when I remove the cap I had pressure the next morning. Maybe an air bubble that needed to escape.