2014 Sportage EX
What is the correct pressure rating for the radiator cap? I heard a tech manager say 8; the last one I bought was spec'ed at 11 psi; and when I look them up today, only 16 psi are recommended. Mine will push coolant to the overflow when hot, but it doesn't suck it back to the engine when cold. I opened it this morning when cold and there's still pressure on it, even though the radiator is low.