I'm assuming my '53 Jubilee has solid lifters. As per the shop manual, I set each valve at .015 with engine hot, each cylinder at TDC. I still get a heavy valve tick but only when the engine is not completely warmed up and only when running between 400 - 1100 RPM. I pulled each spark plug wire off w/engine running and tick does not stop or lesson w/any one wire. Engine does not tick when completely hot, like after being driven for 15 mins. So my question is, do I leave well enough alone, or pull the valve cover and check what's going on when the engine is cold - i.e. put a feeler gauge at each tappet to find the offender. If I reset when cold (or to be quiet), then would I be too tight when hot? Do all Ford NAA's have a cold valve tick?