Acutally, I'm using poly locks for steel rockers (this motor has Comp roller tips rockers) so I'm not likely to make the mistake with the socket. I had someone on here tell me to do the zero lash only just like taking out the inner spring on a dual spring setup. I guess it's supposed to be better on the cam for that 1st half hour.If you have a Comp hyd cam, they recomend zero lash and 1/2 turn preload. If you set them properly before initial fire up you don't have to re-adjust them after cam break-in... I have never heard of just setting them at zero lash for break-in
Getting to zero lash isn't hard but if you pick 10 guys out of a crowd at a car show to do it I bet you get 2 maybe 3 that actually set to zero. Too many use the spin the pushrod between your fingers method and set them beyond zero lash before making the 1/2 turn. The other problem is guys lean into the wrench and after they hit zero lash and pull the socket off the adjuster they haven't reached zero lash yet...
Bounce the pushrod between the rocker and the lifter and don't push down on the adjuster nut when you turn it. Zero lash is when the pushrod just stops bouncing.
Sorry, that may have been more than you were asking for...
Is it, and if so why, to take a push rod and pump on the lifters while they are in a coffee can of oil?? Yes they have been soaking. I'm not too concerned about firing quickly. I've done this a few times even though I'm asking very basic questions. I do this so I don't miss something that has proven to be better than the old way. The only constent in America is change, and someone is always building a better mouse trap.I always readjust the valves after breakin.
One "pitfall" seems to be determining where "zero lash" is. How many posts have we read on engines that pop and spit and won't start? A healthy percentage turn out to have the valve adjustment so tight the valves won't close. Also, if all this stuff is new particularly, the lifters will probably compress quite a bit, then pump up once they have full oil pressure.
Set them a lil on the loose side. Soak the lifters in oil for several days first if you haven't all ready installed them. If you didn't soak them, be very careful about "where" zero lash is, you want the "first one." If they loosen up after a few minutes, ignore it.