[screamingchief]

I dont see any bluing or such,so the failure almost certainly was'nt heat related.

Next most likely culprits are uneven wear or mechanical interference.

If those stamped rockers were run with any other cam than what your running now,then uneven wear becomes a very likely possibility,often that manifests itself more @ the pushrod cup (PR punches thru the cup),but it can manifest in the fulcrum area as well.

Stamped rockers really are'nt interchangeable/re-useable like roller rockers are,new builds should always get new rockers,and if you change cams,you should also change the stamped rockers as well,as the wear patterns in those stamped rockers tend to take a "set" and they dont always fare that well if those wear patterns change.

Some may also blame those grooved rocker balls too,but I dont think those are what caused this failure,not unless the rockers were used,and the grooved balls were new,as that would be the same deal as mentioned ^^^^ above.

I also agree with those that said to check the rocker slot travel too,especially if using a higher than OE lift cam or such (and of course the Crower #60243 cam is).

Would help to what valve springs ya'll are using on this?

Also,were they new rockers,if so what brand were they?



Bret P.