Issue with rocker arms

[Spencer73]

I’ve been having issues with a couple of my rocker arms coming loose. The lifters are good, I have replaced push rods, I’ve got new lifter bolts and have tried thread lock but soon the same couple of rocker arms will come loose. I’m stumped at what I should be looking at next to resolve the issue.

I’ve been going through with the new bolts to torque them to 5lb-ft or roughly 3/4 turn. Those two bolts that have come loose before aren’t really catching torque unless I try to push it way past 3/4 turn which doesn’t seem right to me. Has anyone encountered something like this?

 

[Don C]

For a 351C the rocker arm to cylinder head fulcrum bolts should be torqued to 18-25 ft.lbs.
5 ft.lbs. is what the rocker arm cover bolts are tightened to.
Make sure the fulcrum is installed correctly in the rocker arm and the slot in the cylinder head. Tighten the bolt when the valve is closed.

 

[Hemikiller]

You didn't say which engine you have, but like Don said, the factory 351C are simply bolt down and torque to spec. 302 rockers are also non-adjustable and are torqued to 17-23 ft-lbs