Bought a Van......

The valve train noise in the valve covers continues on start up. As sloppy as the roller rockers fit vs the factory rockers I replaced them with, I thought that would cure it. Now I'm wondering about push rod length or the roller lifters used. On a side note, my '01 Ram with a 5.9 has ZERO noise at cold start up in any temp, and it's at over 270,*** miles.