It does not matter how you adjust the valves. Running hot just gives the 360 degrees of adjustment on an engine at steady state operating temperature. On initial I adjust them cold by turning the crank by hand. Then hot and running , rarely much adjustment needed. With friction adjusters all you need is a ratchet, an extension, and a swivel socket. No burned hands or moving wrench or ratchet. There is no right or wrong way to adjust valves.