Can anyone help? Lifter preload

[WE287GN]

i have used an adj pushrod checker
and also 12" dial calipers to confirm


stock rockers, stock length pusrods(somewhere around 8.680)
used a wire guage (.040" biggest my set went) still too much preload,looked to be at least double

so i do the no lash thing with the adj rod, add 30-35 and come up with my number wich was around 8.625

i confirmed this number by making the adj rod this lentgh ,installing and rechecking preload,came out close enough

NOW
i order pushrods

didnt get the size i wanted (but thats a diff story),actually ended up with 8.605"

i was very worried they would give me enough preload

so i installe dhtem anyway, go to check my preload ,wtf still way over .040"

i came down apx .080" in pushrod length
and i see no change in preload, what the heck could i have possibly done wrong???

i checked on three diff cylinders before ordering

even if i measured wrong even if i was 100 deep in there and came down 80, i should have seen the diff,my 40 guage shouldnt have fit

i am stumped

i checked both by having lifters 180 off the ramp, and also tdc comp both confirming no lift off cam(valves closed)

any info would be greatly appreciated

Chris Pacheco

 

[WE287GN]

hmmm ,what if??

after reading some posts

i am strating to wonder if i have a valve stem height issue

i would think 3 out of 6 cylinders would have done it, but now i wonder if that wasnt enough

whats the best way to check the height,put a straight edge across???

or should i measure from the bottom (where spring sits) u to the top of the stem???

any info would be appreciated

Chris Pacheco

 

[burnout]

I know this question isn't helping you matter but how do you check lifter preload?


Thanks, burnout

 

[GNandGS]

A straightedge across the tops will at least tell you if they are all different.... cant really get an accurate measurement with a ruler for installed height but that wont be needed if they all measure the same.

S

 

[frankg]

Measure again with the adjustable pushrod. You either measured wrong or wrote the wrong # down. Good luck,Frank

 

[WE287GN]

thanks guys

i am going to take another wack at it to be sure of what i am measuring

thanks
Chris Pacheco