Bout time to reset valve lash and I haven't found anyone's previous post about what they recommend. I am setting the lash for my new stock motor for my 99 at .10 and .20, but is there any recommendations for durations of a motor with 100hp injectors and a quad with wiretap? Anything helps, thank you!

Nothing different for modified engines, .10 and .20 are good.  Those measurements are the lower third of the Cummins spec ranges .006-.021 intake and .015-.034 exhaust.  I have always set at .10 and .20 no matter what stage of mod my truck was.

 

I think the 6.7 is different on the exhaust side at .026...probably because they run hotter than ours. 

3 minutes ago, Bullet said:

Nothing different for modified engines, .10 and .20 are good.  Those measurements are the lower third of the Cummins spec ranges .006-.021 intake and .015-.034 exhaust.  I have always set at .10 and .20 no matter what stage of mod my truck was.

 

I think the 6.7 is different on the exhaust side at .026...probably because they run hotter than ours. 

Do you know by any chance the torque spec of the adjustment nut and the bolt that holds down the rocker to the head? 

18 minutes ago, TheGreatWhite said:

Do you know by any chance the torque spec of the adjustment nut and the bolt that holds down the rocker to the head? 

27lbs...Cummins spec on the rocker bolt.  18lbs on the adjustment nut.  Those are ft. lbs. 

 

 

Edited March 21, 20196 yr by Bullet