'94 cavalier, replaced ,rockers,springs,rods head, gasket, etc..

Did all the gaskets new oil and everything. But once it gets warmedup, it starts knocking real bad. ?????????? anyone have a clue? do you think it is the main bearings?:banghead:

since you've already replaced the rods, it could very possibly be the bearings, you got kinda deep in there, why didnt you just replace them too?