Building a 4.7 for my 97 XJ; zero-decked with 26cc bulltear floating pistons on 4.0 rods, .047" gasket, and a 68-231-4 with stock valvetrain save for the springs.
I don't have my build sheet handy, so at the moment I can't give any info on the springs.
The block & head were resurfaced; my pistons stick above the deck an average of .004" each, give or take a couple thousandths.
Anyways, I'm trying to figure out what to do for pushrods.
I used a dial indicator on the oil hole, and after a dozen or so attempts I averaged .103" preload on the exhaust and .125" preload on the intake.
Is that normal, to have different numbers for the intake & exhaust?
The method I used while checking preload, was to rotate the crank until the corresponding cam lobe was pointing 180* away from the lifter; is this an acceptable way to do it?
Assuming I haven't made any grave errors so far, my plan was to run 9.575" rods on the intake valves and 9.590" rods on the exhaust valves, to give me .045" & .043" preload; respectively.
I'm using Comp cam lifters and their specification calls for .020"-.080".
Intake- 9.650 - .125 + .045 = 9.575
Exh. - 9.650 - .103 + .043 = 9.590
Am I on the right path here??
