Hi, I’m currently building up a stroker motor (408), I’ve just installed the rockers but can someone advise me on what clearance I should give on the valve lash? It’s a hydraulic flat tappet cam.
I just put my 360 with Hughes cam/ comp lifters and roller rockers back together last week and went through this. I tried the whole spinning the push rods but found I was looking for more spin resistance than I needed and was preloading my lifters way too much so I restarted. The only cam lobes that are hard to see are cylinder #1, but what I did was starting on #1 I spun engine till both valves were on heel of lobes (compression stroke) and while rocking the rocker gently by hand I tightened both intake and exhaust to zero lash/ no rocker movement. Then I got cylinder #3 liters on heel and so on and so forth did that to each cylinder. I went around the motor counter clockwise getting them all to zero lash. Just to be certain I rotated the motor a couple revolutions in 90 degree increments and checked each rocker to ensure zero lash. I then went around again preloading them all 1/2 turn and locked em down. It may be the long way to do it but im confident they're all correct and I never lost track of where I was. That's just how I did it, with my simple mind I have to dumb things way down.
