RnrdTheFox
Sr. Member
Ok. I understand now. We order the pushrods at the end so he could determine what to get. So I'd say yes I think they are right but I will ask again when I talk to him.
Thanks.
Thanks.
Yes, I'm going to replace them while I have it apart.
It's a roller cam setup. 94 351 roller block with Comp Cam 35-514-8. I ran it for 10 min at about 1200 rpm for break in.
Sorry for the troubles you experienced, way odd. Why this break-in feature? Everything I've ever been told or read said to vary the RPM's if you are even going to do that. Racers have proven that taking a brand new motor out and racing it without a break-in period seats the rings MUCH better than the factory break-in procedure. I plan to let it warm up once, cool down and then go bang gears and lay rubber.
I took a peek at your cam - I've got a 351W .030 over that I had built and that has the next cam size up in it, the 35-518-8. How do you like yours?
Can you take a close-up pic of one of the studs from the side? I'm curious about the threads..they appear to be quite "shiny" in the pic you already posted. I would expect some of that appearance from using the crimped locking rocker nuts...but I'm wondering if those threads are cut and not rolled. The difference in stress concentration values between rolled (as ARP studs always are) and cut or machined threads is huge.
I wouldnt use the ARP studs with those comp magnum rocker nuts. ARP has a differnet thread, and you end up with jacked threads or the problem you already have. Makes me wonder if you have similiar probs with your crrent studs.
I have the same rockers just put on some edelbrock heads, and I galled one rocker stud taking the nut off, I became a bit leary of them. They go on super tight, lots of heat generated. I coat them in oil, and work them on slowly. Id still bet money the cause of failure was the nut nicking the bolt or setting it up in tensile for failure.
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Those nuts are that way by design there locking nuts that do have some thread interferance. Better type to run is poly locks. From the pics it appears that the stud broke below the nut so I highly doubt that the nut even if it did gall the threads caused the issue.
As I mentioned earlier its seems AFR cheaped out on the studs many people have had the same exact issue
Have the same Rockers and Cam in my 351w. Great Cam! You will love the torque once it is broken in and you can stand on it.
Best pic I could get was the top of the broken stud. Also a close up of the failure and push rod.