[ZLRob]

Originally Posted by CamOnlyJabroni

The torque to yield process on the stock head bolts wasn’t done right or it just flat out stretched the factory bolts. Has been fine now with ARP head bolts using the same .028 gaskets. My C7Z is running 11:1 compression with 19-20psi and hasn’t had a hiccup with ARP head studs. Same tuner for both

Don't feel bad about what may have happened bro. These OE bolts are weird despite how stout they appear. During my initial torquing on my build one of the bolts broke deep down inside the engine block for no particular reason. It really made the extraction process difficult at the time, but luckily the block was saved without needing to do anything special to the threads in place, and nothing was damaged except for needing the obvious replacement bolt. I even noticed during the build that the FSM indicated to install the bolts dry when that goes against all traditional modern aluminum engine build wisdom, but I obliged as I thought maybe there was something special about this engine that wasn't being specified in the verbiage.

That is the second time GM has let me down while following their instructions to a T. Next time I'm doing something I have noted to myself that if I see something odd in their instructions that I'll go specifically out of my way to ignore it.