If you had to deal with GM, GM Customer Service and GM corropraite like I had to, you would be bitter as well.
Anyway, the point I was trying to make that you missed is that this engine is in a lot of GM products. More than the G8, Camaro and Caddy. It's also in buicks and GMC cars and SUV's. All have the same inherient bad design of the cam's, timming chains etc.
So why cant GM fix the problem? That is what the OP and I are asking. Performane enhancement parts are a different story and I know that. For performance cams, it's a lot of work to try and design a better cam since these are variable timming/duration cams for both intake and exhaust. About the only thing that they could change would be the amount of lift. But there are other issues with adding lift as in clearances between valve and piston at different durations.
At this point the motor is pretty much maxed out without going to DI or power adders which is evident from the one tune that is available for this motor. They gained a whopping 4 HP and 5 TQ with their tune.
Also why would an aftermarket company invest money into replacement chains/tensioners if there is no market for them? replacing them does no enhance performance. And most of the failures happen within the power train warrenty so no one would be replacing them just because.
So untill GM can fix the actual chain problem, there are going to be a lot more unhappy GM owners like me.
Ansd if you'd really like to know the whole story on my issue, there is a thread on it in the V6 Tech forum titled possible cam issue. There is also another thread on the cam issue with pictures in there as well form a caddy failure. And now there is a third thread on here from another G8 failure.
'12 Hyundai Genesis 5.0 R Spec Titanium Gray 5.0L 429 HP. Lovin it.
'08 Magnetic Gray Metallic Sedan. V6, Sunroof, Comfort and Sound package. Debadged, GT Rear Tail Lights, Tinted windows, 35% rear, 50% front. Royal Purple oil and K&N oil filter. (GONE Lemon Law)
'06 Harley Roadglide.
95" kit w/ custom heads and 50 mm TB. 101 HP/ 104 TQ.Lot's of custom body work as well. And it's Built by ME.