[JD159]

All lifters are solid. Again, my issue was not on cold start, but hot. It is indicative of this condition..

"Noisy when engine assembly is idling slowly or when engine assembly is hot. Lifter
assemblies are quiet when engine speed is increased or when engine assembly is cold.
This may be caused by high leakdown rate in one or more lifter assemblies. Replace any
suspect lifter assemblies."

Having said that, it is tricky to diagnose because I can't quite replicate the hot oil temperatures. I spoke to Greg Brown in Anaheim and he agrees. I tried swepco 502 as a cleaner and it didn't do a thing. He said that clogged oil passages in the lifter probably aren't the cause of my problem. More the leakdown of a specific lifter.

How do the surfaces look? If they are not wearing properly I'll change them all and repeated the break in procedure.