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Username Post: Cant adjust lash        (Topic#356420)
Tstopher 
Poster
Posts: 1

Age: 50
Loc: Beaumont, TX
Reg: 05-14-19
05-14-19 08:54 PM - Post#2766420    

Probably something simple but here is what I have.
496, mutha thumpr hydraulic flat tappet cam, flat tappet pro magnum lifters, both brand new.
Using studs in heads for rockers, poly lock and roller.
Going through the assembly valve lash for zero I have a rocker that the nut is all the way down and cant tighten enough down to set the lash.
Is this a stud issue? Could the pushrod be bent so slightly I cant tell? Maybe a rocker problem?
Never experienced this. This engine has not been run.

70 Nova Pro Street
496 TCI TH350 Ford Big 9"


 


grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17329
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
05-15-19 07:47 AM - Post#2766448    
    In response to Tstopher

step one
verify your valve train geometry and push rod length
you'll want a adjustable push rod and rocker geometry check tool

https://www.youtube.com/watch?v=dbw8W8Oa6BQ


once youve got the correct geometry checker clearances,
and verified push rod length chances are excellent your issues resolved,
if not, check for cam lobe and lifter wear or clearances issues in the valve train

Proform Pushrod Length Checkers 66806 BBC 7/16" rocker studs
http://garage.grumpysperformance.com/index.php?thr...
https://www.summitracing.com/parts/pro-66806

http://www.summitracing.com/parts/tfs-9001 (7.5-to-8.7")

http://www.summitracing.com/parts/tfs-9000 (6.125-to-07.5")


IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 05-16-19 06:56 AM. Reason for edit: No reason given.

 


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