Don,

I haven't set hydraulics with the motor running for at least 30 years. The method I used above is the one recommended by all the cam companies, and it was in the instructions that came with my GMPP cam. You can easily set hydraulics with the motor off, and you'll never have to touch them again. (although that may not be obvious from several of my early posts on this thread) I just had a moment or two of temporary insanity.