Sunday, March 22, 2009 - 12:00 am, by: Shane Sartori(Kingmoron)
ok well i jumped in my car to get myself some pizza tonight and realised there was a rather large crack in my windscreen, i wondered how the hell it happened. i cant take a pic cos its pretty dark outside, ill post later but there was a small pinhole down the bottom (doesn't go all the way through i dont think) and a big say 8 inches by 3 inches 'S' shape. one would think u know small hairline crack gotten bigger, but this is overnight.
anyone know what might of caused it? is this usual for a crack to develop overnight like this. only thing i was thinking that *might* of had something to do with it, was it was raining (no hail afaik)
Sunday, March 22, 2009 - 01:20 am, by: Adam Lonergan(Alchemistal)
Same thing happened to me six months ago with no warning. Came out in the morning and found a 8 inch crack down the centre of the windscreen, passing through the point where the rear view mirror is attached.
Sunday, March 22, 2009 - 01:57 pm, by: Wess McManus(Bar)
Shane I had a ford once where this occured. Turned out water got in seals,corrosion formed and the pressure cracked windshield. Probably unlikely in the galvanized soarer but possible.
Tuesday, March 24, 2009 - 08:53 pm, by: Michael Crimp(Zen1953)
One answer is and I have seen this happen: Because I opened a car door on a 48+ day and the windscreen shattered. The difference in temperature between the inside and outside and sometimes the resultant air pressure can blow or crack a weak spot in a windscreen. They are more likely to blow on a very hot day. It might also have something to do with the layering of the glass. This acknowledgment has led to numerous further strong discussions in the past but I'm not saying any more.
Tuesday, March 24, 2009 - 10:08 pm, by: Peter Nitschke(Pen)
Air pressure won't be a factor. The cabin isn't that airtight, and there are vents in the boot to assist pressure equalisation for when you shut the car door etc.
More likely the glass expansion due to heat put it under pressure and allowed a weak spot to be exploited.
Windscreens used to be made from tempered glass, where the glass is heated then rapidly cooled, making the glass much harder that normal. When anything happens, the windscreen would shatter, almost explode, as the internal pressure in the glass is released. The small pieces of glass also grind each other in the process, so you are left with a lot of very small and mostly blunt pieces of glass.
Tempered glass is still used in the side and rear windows, but the front windscreens are now made from laminated glass. Laminated glass is glass sandwiched on a plastic layer, so if the glass breaks, it sticks to the plastic and doesn't fly around doing damage. The other advantage, is that the glass can just crack and stay intact, whereas tempered glass shatters completely if any part of the glass fails.
Wednesday, March 25, 2009 - 02:33 am, by: Joshua Rao(Soaren1)
thats really random. I think they can patch that up pretty nicely. Otherwise I am wreking a soarer and you can buy the windscreen if its not repairable
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