"How the heck do you adjust them on a running engine? "
You do not grit your teeth - that might loosen fillings.
It can also tear/bend/abuse the feeler gauge/gauges.
With the engine warmed/running, loosen the adjustment-screw's nut;
then, turn the adjustment-screw downwards until the feeler cannot be moved;
then, turn the adjustment-screw upwards until the feeler-gauge/blade can be barely moved;
then, tighten.
Repeat for each of the other 11 valves.
Then listen to the valve chatter and wonder if you should do it again (in hopes to get them quieter)?
Last edited by tclederman; 10/26/2017 3:34 PM. Reason: DJ PM'd a correction
