Busted window

[CTMopar]

We have a 68 Coronet R/T sitting in one of those portable garages waiting it’s turn to be restored. This is in CT so the temperature isn’t crazy hot or anything. It’s been a couple of months since it was put in there so we went to start it up on Sunday. There was condensation dripping on the car from the metal garage frame which was somewhat unexpected as this has never happened in one of these shelters before. The thing that is puzzling is that the drivers quarter glass was shattered. Nothing was there that could have hit it and it was still all in place but shattered. Any ideas on what could have caused this?

 

[steve from staten island]

Distortion of the frame or steel surrounding the window would cause the glass to shatter. If the conditions are right and the glass was stressed id say its possible

 

[khryslerkid]

Hard to tell how much pressure was on it the last time it was rolled up. Then a sudden temperature change and pow.

 

[CTMopar]

The window wasn't cranked super tight and it's a hardtop so it's not totally encased. I looked on some auto glass sites and they say windows will not break solely from heat. They say that if the glass gets above 200 degrees and you blow the a/con it it can shatter. My only theory is maybe it got hot and the condensation dripped on it.

 

[Fran Blacker]

My 68 Dodge Dart had both quarter windows crack several years part. One in summer other I've forgotten. The cracks were corn pieces through whole window.

 

[69L48Z27]

Tempered glass is pretty tough until you hit it on an edge. Water dripping on hot glass won’t do it. Plus, there can’t be that big a temp difference from air temp, surface temp, and make condensation. Something hit the edge of the glass.

Sure you didn’t have some vandals?

 

[Fran Blacker]

Got a picture?

 

[LMSC33]

We have a 68 Coronet R/T sitting in one of those portable garages waiting it’s turn to be restored. This is in CT so the temperature isn’t crazy hot or anything. It’s been a couple of months since it was put in there so we went to start it up on Sunday. There was condensation dripping on the car from the metal garage frame which was somewhat unexpected as this has never happened in one of these shelters before. The thing that is puzzling is that the drivers quarter glass was shattered. Nothing was there that could have hit it and it was still all in place but shattered. Any ideas on what could have caused this?

If the glass is still in place, you probably have some evidence. Tempered glass will form a pattern as it breaks. If you step back and look at it, you will see a pattern that forms from the point the failure started. Either a side impact or a failure from a pinch point. I’ve been in the glass industry since I was 14. You can generally tell where the failure began.

 

[CTMopar]

If the glass is still in place, you probably have some evidence. Tempered glass will form a pattern as it breaks. If you step back and look at it, you will see a pattern that forms from the point the failure started. Either a side impact or a failure from a pinch point. I’ve been in the glass industry since I was 14. You can generally tell where the failure began.

It has fallen in now but initially looking at it, it seemed pretty even across the window because we were looking for a possible impact point but nothing stood out.

 

[CTMopar]

Got a picture?

 

[CTMopar]

No I should have taken one though, as soon as my brother touched it the whole window fell in.

 

[scottmann27]

The car is cursed!!!!! Just give it to me. lol

 

[CTMopar]

I’ll stand in front of it and say “show me”. If it fixes its self it is all yours.

The car is cursed!!!!! Just give it to me. lol

 

[Fran Blacker]

Sorry no. Thought first one vandalism but no point of impact. The window was intact but in small pieces, like you packed corn kernels between two panes of glass. Found a picture of tempered that looks close to what happened to mine. Pieces of mine were a little smaller. https://en.wikipedia.org/wiki/Tempered_glass

 

[chargervert]

Do you have another window for it? If not let me know, I have about twenty of them.

 

[CTMopar]

Do you have another window for it? If not let me know, I have about twenty of them.

I will be needing one. I will be in RI next month.

 

[Begood03]

Tempered glass can break if it is subject to quick temperature change. It doesn't happen often, but it can happen.

 

[Mopardrew]

No idea what did it. Used to enjoy breaking tempered glass with porcelain though. Tiniest pieces thrown at glass will do that with no holes. Crazy stuff