Yes. There may be some exception for stiff valve springs. Stock, or mild valve springs...no break-in needed.I take it break in is more for flat tappet cams then rather than roller
Nothing beyond assuring that the lobes and lifters have appropriate assembly lube, (which might be as mundane as regular engine oil, ATF, or a specialized liquid assembly lube, unless you've got Superman valve springs.hydraulic roller just wondered if there’s any kind of procedure recommended for that
Last roller cam I installed got ATF as an assembly lube on the cam lobes/lifter rollers/lifter internals. It's about the right viscosity at the room-temperature that engine assembly takes place at. Doesn't really have the perfect additive package, but it's only in-use for a few seconds, because as soon as the engine starts, the cam and lifters are bathed in engine oil which does have the right additives and protectants.
If the engine is in a Tahoe, it's really unlikely you're going to use valve springs stiff enough to bother with a "break-in".
Having done occasional oil analysis on pretty-much all of my vehicles going back multiple decades, it concerns me that folks recommend too-soon oil changes; including too-soon oil changes due to perceived contamination or other issues during "break-in".
IF (big IF) a person uses thick, moly-based paste assembly lube on flat-tappet cam lobes and lifter bottoms, then certainly the oil filter needs to be changed at 20 minutes. The moly-paste assembly lube can plug the filter in that time. I'd be reluctant to change the oil, however. Replace filter, top-off, and keep going.
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