Need help c8 corvette convertible top squeaking
Thread Starter
Navigator
Joined: Jul 2022
Posts: 9
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Need help c8 corvette convertible top squeaking
Hello , I just get my c8 corvette HTC and i run around 400km , I heard the squeaking from the rear middle windows behind the driver and passenger seat.
When i open the mirror or hard top down the squeaking gone. so i read old thread its can resolve with 3m dielectric grease but i dont know where can i paint or apply it. If someone know or have this problem before and get resolve please help thank you so much.
When i open the mirror or hard top down the squeaking gone. so i read old thread its can resolve with 3m dielectric grease but i dont know where can i paint or apply it. If someone know or have this problem before and get resolve please help thank you so much.
Melting Slicks
Joined: Apr 2021
Posts: 2,597
Likes: 2,653
From: Texas
It's most likely the rubber seal around the perimeter of the window squeaking when the top is up. Grease the very top edge of the rear window with the top lowered and the window raised fully so you can get a thin line all the way across the top edge. About 1/4-1/2 inch of greasenalong the top edge. That *should* fix it unless the squeaking is coming from the HTC motor assemblies.
Drifting
Joined: Sep 2020
Posts: 1,423
Likes: 639
From: Columbia SC
Or better yet.. go to your local Chevy, Buick or GMC dealer and have them put the OEM window grease on it. When I got my 2021 HTC the back window had some clear grease smudges on it... I wipe it off the window , but it came back every time I opened it. After 12 months it stopped smudging the window, but the squeak didn't return
Don't need a specially trained Corvette teck to do that..
Don't need a specially trained Corvette teck to do that..
Melting Slicks
Joined: Apr 2021
Posts: 2,597
Likes: 2,653
From: Texas
Vaseline can be worse. I recommend using Gummi Pfledge (on the rubber seal). I used it on my HTC weather seals for years on my SLKs and it was aces. Vaseline can actually break down any rubber seals exposed to it.
Or as above poster said, OEM window grease on the window.
Or as above poster said, OEM window grease on the window.
Last edited by Korbek; Jul 18, 2022 at 02:41 PM.
Team Owner
Joined: Sep 2010
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Exactly what's worse about Vaseline vs. automotive grease ?? My Chevrolet dealer uses Vaseline, so it cannot be worse than petrochemical grease.
Race Director
Joined: Aug 2016
Posts: 12,763
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From: Garden Valley CA
If your dealer uses Vaseline on weather stripping you need to find another dealer. Your dealer should be using GM approved lubricants (silicone based) on the weather stripping. Petroleum based products will degrade the weather-stripping.
Team Owner
Joined: Sep 2010
Posts: 32,042
Likes: 4,610
Well, they probably use WD-40 too. GM approved? Who knows...
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Melting Slicks
Joined: Apr 2021
Posts: 2,597
Likes: 2,653
From: Texas
See below (although I already mentioned it in my post above).
This. Petroleum jelly (vaseline) will degrade rubber weather stripping. Bad idea. I've been driving HTCs since 2008 and avoid the stuff. I've never had a single squeaky HTC seal or leak in any of the 4 HTCs I've owned. (5 now counting the C8)
I didnt say to use automotive grease. I said to use Gummi Pfledge bc it is designed for use with wrather stripping. But really any similar product would work. I just recommend OP absolutely NOT use vaseline. You do you though.
I didnt say to use automotive grease. I said to use Gummi Pfledge bc it is designed for use with wrather stripping. But really any similar product would work. I just recommend OP absolutely NOT use vaseline. You do you though.
Safety Car
Joined: Nov 2007
Posts: 4,433
Likes: 873
From: Bay Area CA
GM uses Dielectric grease. Rub on thin coat, allow the weatherstrip to absorb the grease for 10-15 minutes. Then wipe off excess.There was a You tube video that Rick Conti did with his Corvette service technician. They did exactly what is described above. Don't use other chemical products because they will only deterioate the weatherstip in time.
Racer
Joined: Jan 2021
Posts: 402
Likes: 88
From: Rochester, NY
My dealer said don't do that with the dielectric grease and said they had complaints about it and reached out to GM. GM had a fix and said something needed to be tightened. Just read my repair bill:
contact tech assist center, advised on recommendation to R&I rear sliding window motor for possible retorque to fasteners. (Lists a bunch of numbers and some letters) removed rear covers to access rear window motor regulator, verified retaining bolts not properly torqued. Torqued all fasteners to spec and reinstalled.
contact tech assist center, advised on recommendation to R&I rear sliding window motor for possible retorque to fasteners. (Lists a bunch of numbers and some letters) removed rear covers to access rear window motor regulator, verified retaining bolts not properly torqued. Torqued all fasteners to spec and reinstalled.
Last edited by Hockeyfun1; Jul 18, 2022 at 11:53 PM.
Thread Starter
Navigator
Joined: Jul 2022
Posts: 9
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GM uses Dielectric grease. Rub on thin coat, allow the weatherstrip to absorb the grease for 10-15 minutes. Then wipe off excess.There was a You tube video that Rick Conti did with his Corvette service technician. They did exactly what is described above. Don't use other chemical products because they will only deterioate the weatherstip in time.
Can you please give me a link? Thank you. 😊
Race Director
Joined: Aug 1999
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From: Bluffton SC via Canton Oh
Why not just open the rear window just a hair? I bought the grease but it’s so much easier and cleaner to just crack the rear window! No noise,no rain gets in, I just close it when I wash the car.
Racer
Joined: Jan 2021
Posts: 402
Likes: 88
From: Rochester, NY
I was doing that but thought it's silly to have to do that. I thought it's silly to add dielectric grease too. I brought it to the dealer because it simply shouldn't rattle, and they had a fix that I posted in my last post.
Team Owner
Joined: Sep 2010
Posts: 32,042
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See below (although I already mentioned it in my post above).
This. Petroleum jelly (vaseline) will degrade rubber weather stripping. Bad idea. I've been driving HTCs since 2008 and avoid the stuff. I've never had a single squeaky HTC seal or leak in any of the 4 HTCs I've owned. (5 now counting the C8)
I didnt say to use automotive grease. I said to use Gummi Pfledge bc it is designed for use with wrather stripping. But really any similar product would work. I just recommend OP absolutely NOT use vaseline. You do you though.
This. Petroleum jelly (vaseline) will degrade rubber weather stripping. Bad idea. I've been driving HTCs since 2008 and avoid the stuff. I've never had a single squeaky HTC seal or leak in any of the 4 HTCs I've owned. (5 now counting the C8)
I didnt say to use automotive grease. I said to use Gummi Pfledge bc it is designed for use with wrather stripping. But really any similar product would work. I just recommend OP absolutely NOT use vaseline. You do you though.
Race Director
Joined: Aug 2016
Posts: 12,763
Likes: 10,199
From: Garden Valley CA
Vaseline is petroleum based. There are petroleum based greases, silicone based greases, etc. Grease is a generic term.