There's 2 different issues being discussed on his blog as related when they really aren't. the "rattle" heard on nearly all of these engines is caused by the buffered supercharger coupling Eaton used. In nearly all of these cases, it's just a rattle and most owners will never hear it. I can hear mine rattle with the hood open and standing in front of the car but I don't hear it at all while driving. I've seen a couple of cases where the coupling components have cracked but it seems pretty rare. The dry bearing issue is nasty though. Good to see GM step up and take care of it.