What should I check?
We just had a new/used engine put it and it drove a pretty good distance (about 2 hours worth) with no problems..
Then one day it just overheats. Coolant level is ok but we top it off... still over heats...
Now some coolant is coming from somewhere from the back of the engine..

The b/f tries to bleed the line but nothing but steam comes out as he says...

So i'm under the impression that the coolant isn't making it to the engine? He replaced the thermostate but that didn't do a damn thing.

waterpump?
hose?

any ideas? for when I finally get the damn thing back here and I can check it out?