Totally new? Like assembled, tested, and shipped as a crate motor?
Theoretically, it shouldn't.

This is something I've never understood. People often reccomend this.
However, every year millions of cars are built and sold new.
None of them has the owner return 1000 miles later for the head bolts to be retightened.

Yes, I know the manufacturers runs the engine before install for the pre-break in etc - but not 1000 miles...

I understand the "better to check anyway" philosophy - but why would this case be any different from a new car?

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
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'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah