1985 Other Dodge Models leaking fluid

Engine Cooling problem
1985 Other Dodge Models 4 cyl Four Wheel Drive Automatic tons miles

HI, yesterday I noticed that I was leaking fluid around the water pump. I bought a new one. My husband installed the new one last night. This morning when I drove him 1 mile downt he road to his semi, when I came back to the house I was smoking. Popped the hood and found coolant ALL OVER the drivers side. There was a puddle of coolant on top of the timing chain cover. Now hubby broke something that hold the nut in place on te timing chain cover, and we found a small crack on the cover. Could that be what is the problem with me loosing so much fluid. I mean we filled it up and I have a stream of fluid running out ONLY when running. The raditor is brand new, the water pump is new. Please help