They are the intake 1# and #3 lifters. In fact there is not preload because they are solids.What happens is the valve starts to open when i,m giving the 1/2 turn wich was giving me a false preload sensation. I have checked it with a dial gauge .When i tight the 1/2 turn the valve opens 0.020 or so,then it backs to its close position very slowly.
