Lachute did cut off the spring and plunger from my cap. I'm thinking maybe in the process of doing that they may have damaged the cap itself and that's why it's leaking. I'm wondering though, does it matter if I got a 20psi cap or a 1000psi cap(I know they don't make them)? Is there a limit I shouldn't go over, like as a precaution so that the cap blows before the radiator? Thanks.