Grinding valve seats, and valves is factored into Toyota's design. This is why the factory service manual provides guidance on how to grind the valves and valve seats.
If you are taking the engine down for a major overhaul (200k+) and you don't grind the valve seats and valves you aren't fully rebuilding the engine.
So is "tip the valves" and "grind the vales and valves seats" a similar action in the FSM?
I'm curious even though it doesn't apply to me as I commissioned a new OEM long block where none of this applies. Thanks for any correction!