New to the forum here and looking for a little insight. I just recently purchased my V6 G8 with 138,000 miles and have had nothing but issues since the start. On the way home after buying it, I got a check engine warning light with the code p0009...took it back to the dealership the following day for timing chain and cam gear replacement work. The work performed was all new chains, cam gears, camshaft position sensors, VVT sensors, oil pump, radiator (it was leaking from the reservoir) water pump, rear seals, and gasket set ...yeah how they sold it with it having so many issues is beyond me, BUT after a week they claimed it was ready for me to pick it up. The issues began that night. First I noticed that my headlights were flickering. It would also spit out the CD in the player and reset my radio to factory settings. I immediately assumed alternator/battery. The next day it threw an alternator warning light. Drove it back home (yesterday) and let it set until today. Went back out and put it in engineering mode to check the charging values and that's when it started making a sound coming from the engine that I couldn't readily identify, but sounded like it was possibly lifter related. Just looking to see if there's anyone out there that knows what this issue might be. The only thing I can come up with is lifter. It also has a new code- camshaft position sensor. The sound is loud and in time with the engine RPM's at idle. Did not rev the engine to see if it accelerated with it, but it is constant and could be compared to the sound of a cracked intake vacuum leak or exhaust manifold leak.