rocker arms tapping

I like to do it running with the engine at a stable temp. I think running is MUCH easier, No making sure the cam is on the back side of the lobe, nothing to confuse you. Just turn your idle down as low as it will stay running. 300~400 rpm for my old 170. The easy way to know you got it "right" when doing it running is when you put the feeler gauge in, that cylinder will have a slight miss and it goes away when you pull the feeler gauge out. I have never made a mess doing it running, even at 700 rpm.

TopHat