Just took my 2018 G80 Sport 3.3T back for what I described to the Dealer Service Tech as a weak lifter(used to be a problem with hydraulic lifters back in the day). The first time I took it in they blamed it on the High Pressure Oil Pump. It was obvious they didn't hear it. The noise I heard was on startup, backing out of garage with window down. A definite tap, tap, tap .... that isn't heard until the car is in gear to slow the initial high idle. The noise went away once the engine was warmed up. And then back again the next morning backing out of the garage.
So, as it went back for next oil change, I mentioned the noise again and offered to leave the car sit overnight and meed the mechanic the next morning to let him experience the noise. Well 6 weeks later after CVVT sensors, Fuel pump & fuel pump lifter replaced, Cams out and inspect, lifter lash checked and rechecked, multiple checks with the Genesis Tech line and expert, the car still makes the noise. A different tone now that doesn't go away after warm. The tech expert will be on site next week with a similar G80. Plans on letting both sit over night and compare noise(s) the next morning between to two engines.
I'm hoping I can listen to the difference once the Tech Expert is finished. I've been told I can not be present when he is diagnosing. He is not permitted to talk to customers?
At the same time, both times I complained about the steering having spots where the wheel sticks and doesn't return from minor turns. The first check didn't find any diagnostic codes and supposedly all the adjustments and settings were correct. The second time in, I was told there was a computer setting incorrectly set to RWD where that auto is really AWD. It's is an HTrac Drive System. The Tech Expert said the setting could be the difference. Oops, steering still the same & with colder weather it seems to be worse.
I requested that while the Tech Expert was looking at the engine noise he could drive both cars to see if he feels any difference in the steering. I drove a G80 5.0 with HTrac and it handled like a dream. I couldn't get the mechanic to test drive the G80 5.0 that I drove.
I insisted with the Service Rep that he lets me drive the G80 Sport that the Tech Expert is bringing in.
I'll update later next week.