If your MOUNTING STUD is
accurate, and your measurement of the cam lift and setting of the push-rod and
valve to MID-LIFT was all accurate, then this (and the following) is what you
will see. But what if you see something like the image depicted on
PAGE 9.
If you have a GAP on the BACK of your rocker (over the cup), then your stud
angle is less than factory specs. Your measurements during the first two steps
were WRONG. BUT... not to fear. The SPREAD was correct. So there is an easy fix.
Simply go back to turning the
engine over SLOWLY in the clockwise direction, as normal, and watch how much the
DIAL INDICATOR opens the valve until the G-TooL is FLUSH atop the rocker arm.
Lets say it is .030". It took .030" MORE VALVE LIFT to LEVEL the G-TooL FLUSH
atop the rocker arm. Okay?
You must REMEMBER that you are
using the PUSHROD to ADJUST for VALVE LIFT. That means that RATIO must be
accounted for, to adjust for VALVE LIFT CHANGES. (This is NOT subject to our 80%
rule... this is a VALVE LIFT issue.) You need to DIVIDE the CHANGE
by the ROCKER RATIO. If you are using a 1.50:1 Ratio, then you would divide the
.030" extra valve lift by 1.50. This would be .020" required change in
your pushrod length. You need to LENGTHEN the push-rod an additional .020" over
the length you calculated. THIS IS YOUR TRUE and ACCURATE net lift.
Since the head studs were
incorrect from factory dimensions, the first two steps were also incorrect in
the pushrod length they said was required for .500" and .700" valve lifts. But
your dial indicator is accurate (we hope), and it reflected the error in our
third step, because the calculated lengths were based on wrong lengths. You've
just corrected for that. If you went back to the first two steps now, they would
be off again. So you can't try to use them without correcting as we have in this
final step.
PLEASE NOTE: If by chance
you have a GAP on the opposite side of the adjusting nut (roller tip side)
because of a wrong stud angle, then you need to rotate the engine
COUNTER-Clockwise to set the G-TooL flush atop the rocker. Your push-rod length
changes will also be shortened now, instead of lengthened.