Why is my car overheating and leaking coolant

What is your question?

I recently changed the thermostat housing in my car after discovering that there was a crack in the housing. My car is now over heating and leaking coolant from some where underneath the car. Can someone tell me why.

What makes this problem better or worse?

Happen when the car warms up

How long has your 2003 Ford Explorer had this problem?

Few days