Was doing the Cap'n (RIP) valve adjustment method the other day and started wondering - is there a way to tell when a cylinder is at TDC by rocker arm position(s)? I certainly can feel when one of the cylinders is compressing air/air leaves the combustion chamber based on how hard it is to turn the non-blocked wheel/tire.
Thought this may be a good way to mark the fan with TDC points for doing a leakdown test soon (can't figure out how to get TDCs on a hot engine for the leakdown).