Originally Posted by OM617YOTA

Thanks folks!

I'll do the O-rings and verify that oil is staying in the oil filter housing after shutdown. I do get 90psi oil pressure on the gauge within 1/4 second of starting(cold), and the rattling does continue after there's pressure on the gauge, so I'm pretty sure that's not a huge part of it. When it's warm at idle it'll only have 15-20psi and it doesn't rattle then. Pressure goes right back up as soon as it gets above idle.

I'm anxious to do another compression test. This new starter cranks a LOT faster, I bet my compression numbers are a LOT better now.