I'm geting ready for long holiday trip and need to double check this. I just replaced my radiator and have been checking things periodically and noticed that there is a hell of a lot of pressure on the return hose ... also that the rad cap is a lot tighter on the new rad ... possibly making pressure release diffcult?

The cap should release pressure into the res tank or outside, no?
Should I replace this cap? It is the new style cap, not the old dome type.

Happy Holidays and Thank you!

Ken