A friend of mine, who is not a member of the forum, told me last night that in the last month he had to replace his windshield because a crack developed in the center of the windshield at the top behind the mirror. His initial thought was that something hit the windshield and caused the crack. Two weeks after installing the replacement windshield another crack has developed in the exact same spot. He says that he has not heard or seen a stone or debris hit the windshield, and there is not a bulls-eye or chip that started either crack. He is wondering if their are other coupe owners that have experienced this. I told him that I had not seen any comments like this on the forums, but would start a thread to see if someone else might be able to help him. Since I have a vert, not sure I would help him much. Thanks in advance for any useful comments!

 

Wow, that is bizarre. I've heard of a cracked windshield or two on the forum but never a reoccurring one. I certainly won't speculate as to whether this is an induced failure or not though. Did the first windshield get replaced under warranty? Did the dealer or authorized GM glass replacement company provide the new windshield? Safelight is an authorized 3rd party GM glass supplier as far as I am aware.

Regardless, I would strongly advise that he contact Chevy customer service, provide them with the info on the first windshield and get a case open immediately. 3rd time is a charm when it comes to lemon laws and if by chance there is something structural related to his issue (perhaps windshield frame out of form), then he may have an avenue to for a replacement car should this continue to reoccur.

 

Thanks for you comments. I have given him the same advise about Customer Service. His windshield was replaced by an authorized GM glass supplier (I believe Safelite) through his dealer. I was curious if there were other cars that had a similar experience and maybe some correlation with the type of lift off top?

 

I am thinking he might be the only one

 

There must be some stress that causes these cracks. I would think a call to a GM rep. is in order. It is odd that the stress wasn't relieved with the replacement window. Could be temperature related? I have seen windshields crack when the vehicle went from a cold garage (cold soaked garage) to a warmer exterior temperature.

 

After posting my reply, I did a search in the C7 section and found nothing. I will do a similar search in the C6 section and report back if I find anything. I certainly don't think this is related to the removable top. My first thoughts are something road related if he lives in an area of inclement weather where there has been a lot of snow however the fact that it's starting in the same place is rather strange but not out of the realm of possibility.

My second thought is that the repair company didn't clean the window frame well when they installed the new glass and for what ever reason, there is some stress on the glass where the mirror is located.

My third thought would be some sort of stress where the mirror is located that is being generated from outside the windshield frame. Does he have a radar detector hanging from the mirror? Is he clumsy with his mirror? Could there be something behind the trim cover that covers the upper window frame and mirror area that is creating stress on the windshield? I've had that upper cover off of my car and there is nothing there that I can think of that would cause that kind of stress.

Lastly, since the glass is glued in, it's not like they have to bend it to install it. It's a matter of setting it in place. Having said that, if there is a high spot in the window frame that is contacting the glass after the install, that could be an issue. There should be a thin layer of silicone between the window frame and the glass and if the cars structure is coming in contact with the glass in that particular area as a result of a high spot in the frame, than that may account for his reoccurring issue. It could be as simple as identifying a potential high spot once the window is removed and tapping it out with metal working tool before installing the new windshield. Frankly, this would be the first thing I would be looking for once the old glass is removed and the silicone is removed.

 

Thanks again for the comments. Weather is not an issue since we both live in Fort Myers, Florida. Our weather extremes typically run from 70 - 90 degrees this time of year. I do agree that it sounds like some sort of stress that maybe be causing this and a high spot in the frame could be as good a guess as any.

 

Wow, that sucks. Sounds like something in the car is tweaking it just right to crack it. Let us know what he finds out!

 

Post 18 of this thread mentions a similar issue being caused by a blemish in the window frame as I mentioned above. While it was not Corvette related, this could be the cuplerate.
http://forums.corvetteforum.com/c6-c...d-cracked.html

 

 

I would say that since it cracked again in the same spot that there is a factory defect in that spot , possible a defect in a spot weld that is raised up and not noticed to be ground down by the workers on the line. If that is the case , it will continue to break windshields and the replacement tech should have noticed it . Something is not smooth in that area. I would definitely let customer service know right away.

 

Mine cracked on Friday last week for no reason. Sent this pic to the dealer and they said to bring it in.

There is no sign of an impact and it was inside a garage when it happened.

Also it only had 58km's on the odometer!! (just under 40 miles).

 

Wow that's terrible