Aftermarket heads: Rocker stud holes
Since I've had a bad experience with header bolt holes breaking into the water jackets on aftermarket aluminum heads in the past, I have to pose this question. A number of years ago I remember someone on this board posting a thread about going crazy for several weeks trying to get his engine to run right with a new pair of fully assembled AFR aluminum heads he purchased. When he finally called AFR, he was told that some of the rocker arm stud holes on their cylinder heads break into the intake ports, and that it can cause vacuum leaks. He was instructed by AFR to remove all of the rocker studs that they installed, and re-install and torque them down with thread sealant to stop any vacuum leaks. And once he did that, the problem was solved.
That was a number of years ago, and I don't even remember who on here that was, but can this still occur with AFR or with any other aftermarket cylinder heads? I'm thinking that if it can, then the thing to do with any heads purchased fully assembled, would be to remove and re-torque the studs with either thread sealant or Red Lock-Tite 271 as a routine measure. Has anyone here ever seen any of the threaded rocker stud holes break into the intake ports on aftermarket heads from any manufacture? I didn't have that problem with the AFR heads that I bought a number of years ago, but I just thought I'd ask.
70 Chevelle SS clone (632 CI powered).