I need help from the experts.

I bought this car used a few weeks ago. 2005 C6 with 60 miles. The problem is there is a wind/air noise over the top of the windshield at high speed. I noticed this before I bought the car, I also noticed the removable roof panel looked like it sat low in the front when installed.

I took it to a place called Corvette Center in CT. Right away these guys were very helpful. I explained my issue, we looked at my car and tried another roof panel. After some head scratching, they came to the conclusion that the roof weatherstrip was being pushed up between the roof panel and windshield and catching the air at high speed. Because the roof looks low in the center but looks a little high by the pillar molding they believe the roof is not low but the windshield is high, and that is pushing up on the weatherstrip. Sure enough the windshield was replaced (no GM emblem). The fix is to cut out the windshield and reinstall it. They say there is a good chance the window can not be saved. If that is true this will be an expensive fix.

I want to make sure I am going in the right direction. I am looking for a second opinion. I attached some pictures with the top on the car. These are shot from the passenger side. Notice how the roof looks low on the gasket but high by the pillar molding. Also notice how the weatherstrip sticks out above the top windshield molding. The other C6 they had looked different (the weatherstrip went under/behind the molding).

Any help will be appreciated. If you need any more info, just let me know.

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BEFORE you jump the gun and change out the windshield. Take some masking tape or boxing tape and apply it on the top and windshield... basically closing/sealing off this area from wind. AND then test drive it. Knowing that someone got into it before...it can be highly likely that the installer of this aftermarket windshield did not give a crap....and left some important sealing material out.

I would purchase the windshield from GM. The company that I use that comes out to my shop and installs my windshields has mentioned to me that the GM windshield goes in like a dream...and some of the other types that they were forced to install ( due to an insurance company "thing")...seemed to be a bear to install and took much more time to TRY to get to fit. I have had several done by them (using GM glass) and never had a problem.

"DUB"

 

I will try the tape. Also it does not sould like an air leak in the cabin, but more like wind above the roof/windshield. I think, to work the tape would not be used to seal, rather to be used to smooth the transition from the windshield to the roof.

From what you see in the pictures, does thier (Corvette Center) theory seem plausible?

The glass is AP technoglass with no GM emblem. Should they be able to save it?

 

Make sure you take some of the bite out of the tape by rubbing it across your pant leg. This way it won't be so hard to remove after testing. There should be NO GM logo on the glass and I believe that the AP logo is correct. You can confirm this by going by a GM dealer and looking at any other that may be on the lot.

I believe that the top section of the windshield was not set down far enough.. because your top surely does look like ti is lower than needed.

As for removing it without damaging it. That I can not answer...but at least be ready for the worst. But make no mistake...get your glass from a GM dealer.

"DUB"

 

I talked with my glass guy today and he mentioned that IF the factory stop blocks were removed from the car...that you may have an issue. And he also looked at your photo's you posted while I was talking to him and stated that when these windshields are being installed at his shop. Once the windshield is installed...the first molding to get installed is the top molding so the glass can be pressed down to the factory stops and then the other moldings get installed. He felt that they did not get the top down all the way before the urethane began to set up.

For whatever this is worth.

"DUB"

 

DUB- First thanks for your help, greatly appreciated.

second-

Step Blocks, are these located on the pinch weld and used to determine the installed location of the glass? When you say pressed down to the stops, you mean pushing the glass toward the frame, perpendicular to the slope of the glass, correct? If the idea is the window was not pushed in enough, couldn't the step blocks still be there but just not hit? I am having a hard time visualizing this.

Would a factory service manual help me with this? I think I will order one.

 

Yes...from what my glass guy told me. The factory stops are glued to the windshield frame. When the urethane is applied to either the glass or the frame of the car...when the windshield is installed. He applies pressure to make sure that the glass goes down and contacts these stops. They are used to make sure that the bead thickness of the urethane is consistent... because these stops keep the glass away from the frame the same distance. Then he installs the upper molding and tapes the glass to it to keep the glass from sliding downward.

The hopefully your stops are still there and were not removed.

"DUB"

 

just wondering how it was fixed cause i have identical problem