I was replacing a cracked heater core hose earlier and bleeding the air out of the coolant, as I was tightening the bleeder bolt down the housing cracked. I swore I was being careful, alas this is what I'm dealing with. I'm not really car sav vy but Id like to see if this is something I can do myself. If anyone knows the parts I would need or am I in over my head and should bring it to a mechanic?

 

The broken part is the thermostat housing case, Honda 19320-P0A-010.