Rebuilt Engine bearing wear

Phreakish said

Rod knocks don't come and go. But lifter noise does. Lots of folks think lifter noises are rod noises, but usually they aren't.

A rattle on start up is often a lifter issue. If it comes and goes, the lifter is probably junk. Hard to find good hydraulic lifters these days - assuming yours are hydraulic.

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I agree with what you say. Rod knock doesn't come and go. The noise Im hearing is 100% rod knock unfortunately. The strange part to me is these bearings are fresh. It made this EXACT noise in the EXACT same area when the previous bearings were fresh. That noise did go away. I know this noise shouldn't go away, but it did last time. We will see this time though... ****