01 camry radiator high pressure but Not overheating

Hey there, I’m have troubles finding out
what’s wrong with my 2001 camry 4cyl. It
started smoking from radiator cap and
overheating then I noticed a crack on top of
radiator. Replaced it with a new radiator and
replaced the thermostat as well. Now it
doesn’t overheat anymore, but it keeps
pushing the antifreeze back to the cap, and
start smoking from the cap too! Do you guys
have any idea what might be the problem?
Thank you