Route 66 NHRA Nationals parking pictures.

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Originally Posted by TS310C

Jeff,

Yep it sure was a Jesel! It is the second one I have broke. They are breaking at the adjuster. I talked to them at Jesel and they said that if you don't use a torque wrench to make sure you don't over tighten them you will stretch the threads and weaken the rocker at that spot. Since I am the second owner of this motor, I am not sure how they were tightened. I just bought 16 new rocker arms so I can start over fresh. They treated me really fair on the price!

This makes 3 for me. every time it is an intake rocker. Breaking in the adjuster area. Almost look like it breaks with the grain and all three breaks look identical. I bought these rockers used along with the heads from a guy who used to travel with us. What is the torque spec? I always just snugged the lock nut up with a normal combination wrench.