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Loudest quiet car ever!

sandwich

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Hi All,
I just acquired a new-to-me G80 and while I love the car, the noises from the interior are absolutely driving me nuts. The car is a 2018 with just 12500 when I bought it, and I've spent the last two months trying to track down a couple of squeaks and rattles that are irritating the heck out of me.

The first and most obvious is the sunroof, which on my car isn't squeaking but rather rattling/clunking. I've lubed the seals and now the squeaks are gone, but it seems to be clunking when the body twists where the two plastic sliders sit in the tracks. I could be wrong, but there's no noise with the roof in vent position, and I can replicate the noise by pressing on the rear corners of the glass. The same sound occurs and it seems to be coming from further up where the sliders are. I already see white lithium grease on the tracks, but is there anything else I should add? Anyone else experienced similar symptoms and remedied them?

I also have a somewhat more annoying squeaking noise coming from the front right passenger dash area. I have lubed everything I can find with silicone oil (even under the hood!) but I still can't get this to quiet down. It seems to disappear in the rain or after a wash, suggesting that it's outside the car, but nothing seems to be the magic bullet. I've lubed window tracks, door seals, plastic components, underhood plastics, glovebox damper, nothing will silence it. It has a "weighted" sound to it, such as when I go over a dip or swing left and right, the sound changes...like it's a door or hood or something and the momentum is increasing the sound. It's faint but persistant, and I'd argue it's more annoying than the sunroof as at least I know what that is. I'm hoping I can get a passenger to drive around and press on things in the next couple of weeks, but if anybody has ideas I'm desperate...!
 
I have a G70 and the MrCleeen solution here is what I used and it still holds for the sunroof, if your issue is the same:
 
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You will also need to occasionally lube the door frame seals; that was a source of noise for me. Once you mostly get the sunroof lubed and mostly-quiet and whatever that dash rattle is, you will find that the biggest source of noise intrusion is rough roads sending noise through the wheel wells and especially under the trunk carpet. Aside from the carpet, there is zero sound insulation between the sheet metal in the trunk and the trunk carpet. I had always intended to get some knockoff Dynamat and line underneath the trunk carpet; I've heard anecdotally that made a big difference in the road noise level, but never got around to it before trading my car in on my G70.

Good luck in any case.
 
Thanks. I haven't looked at the front of the sunroof, that could be worth exploring. I've tried adding some rubber bumpers under the rear overhang, which did *something* but it didn't silence the noise. Perhaps something soft up front would quiet it.

I've lubed the doorframe seals. There's so much silicone oil on this car I've probably added a few lbs to the curb weight. Whatever is making that creak/groan noise is the worst...I saw a thread on the genesis coupe forums where people found a broken spot weld, and that's honestly one of my guesses. I'm hoping it's not that though, and that I'll find a random plastic bauble that needs a squirt :(
 
I have a G70 and the MrCleeen solution here is what I used and it still holds for the sunroof, if your issue is the same:
I tried putting some towel pieces on top of the shuttles and it seemed to do something, maybe I am on the right track.

Do you have an image of the un-altered tracks as shown above? I can't figure out what I'm looking at. On the G80 there's a similar piece, but the slot angles downward rapidly. I'm not sure it's the same thing or not.
 
 
Thanks, I'll see if i can try that next. I used a pair of towel strips placed on top of the plastic shuttles at the back of the sunroof. This seemed to help, maybe a 30% improvement. That might be enough. I'm going to try a more permanent solution with some EPDM rubber strips on the same shuttles, and while I have it open I'll take a look to see if there is a similar piece as seen on the stinger pictures and the fix above. I'm not sure the track is the same, but I can give it a shot.

The real killer is this groan/creak thing. It's killing me. Each commute I add a little lube to another location, but I can't figure out what's causing it. I just lubed the rubber strip in front of the sunroof. It's the only rubber thing close to the windshield that I can see that i haven't lubed yet.
 
I finally made some headway.

Seems like the creak I was getting was due to something in the wheel well. I tightened the bolts down there and shook some dirt loose...now it sounds like a real car!

Sunroof is still rattling, I've narrowed it down to the little pegs that enter the slots to move the glass panel up and down. I wonder if I can wrap them with some shrinkwrap or teflon tape to mute the rattle. The Kia fix did nothing, sadly. Adding some grease helped but it's temporary as the track gets cleared over time.
 
Try the Krytox 205. It takes a lot longer to wear off. As for wrapping, I'd use the old standard felt tape.
 
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