Shattered rear Window - Page 4 - Toyota FJ Cruiser Forum
Problems / Dealer Service If you are having a problem with your FJ or want to discuss a visit to the service department, post it here.

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post #31 of 40 (permalink) Old 05-09-2019, 04:45 PM
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Re: Shattered rear Window

I'll bet you were you listening to really loud CD of one of those opera singers who's voice can shatter glass? Lol
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post #32 of 40 (permalink) Old 05-09-2019, 11:03 PM
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Re: Shattered rear Window

Iíve had it happen while pulling a trailer. Stone off the back wheel bounced of my trailer fender and blew the back window out. Sounded just like it was taken out by a gunshot. Hopefully youíll have it
covered by you insurance like mine was. Good luck! Stumper
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post #33 of 40 (permalink) Old 05-16-2019, 06:27 PM
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Exactly what Bigguy said.

Wife and I were towing our NRS raft last summer on a paved road and BAMM!

Same thing. Window shattered. No Bullet found. No rock found. All I can figure is a rock flew out of a rear tire, hit the trailer and ricocheted up enough to hit the glass but not come through(?)
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post #34 of 40 (permalink) Old 05-16-2019, 08:51 PM
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Re: Shattered rear Window

Check out the Rock deflector on this Tear Drop.

https://carpexpedition.com/trailers/the-apache-trailer/
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post #35 of 40 (permalink) Old 05-16-2019, 09:42 PM
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Re: Shattered rear Window

I thought all glass on a car had to be safety glass including the doors. Is there a different rule for rear windows? That is definitely not safety glass. It might be tempered glass which can fail in some funny ways. A friend had a shower door start a slow crumble in the middle of the night for no apparent reason. He heard some noise and watched the cracks grow and pieces fall. The shower door people said it happens all the time.

Jumping subjects. The old man's car had a safety glass windshield spontaneously crack while parked in the afternoon Phoenix sun. It was about 110degF that day.

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post #36 of 40 (permalink) Old 05-16-2019, 10:05 PM
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Re: Shattered rear Window

Rear and sides are Temperlite.





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post #37 of 40 (permalink) Old 05-17-2019, 05:12 AM
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Re: Shattered rear Window

"I thought all glass on a car had to be safety glass"

You are correct, all of the side and rear glass is tempered (which is extremely strong, but shatters into a million tiny squares when chipped), and the windshield is laminated glass (which has a PVB layer between two sheets of thin, flexible plate glass, which when broken, the PVB stretches and deforms to hold the glass shards together to hold you in, but who's glass edges are incredibly sharp so they'll cut skin if touched).

The reason why the windshield is different is because stone chips cause it to get impacts far more often.

Laminated glass is very soft. Individual stone chips don't always, immediately propagate, and when they do, overall visibility is usually still possible. Its flexibility is key to being able to laminate the layers together (the two sheets of curved glass must be able to conform to each other, and the PVB sheet, during the process to avoid air bubbles or gaps which would affect visibility).

So, although tempered glass windshields were used for some time (up until the '60s in the US, sometime later in Europe), the rule was eventually changed to laminated glass, so that at high speeds a single stone chip would not result in the whole thing in your face and lap.

Tempered glass, because it is so strong, and because stone chips and high speed are rare in bathrooms and buildings, it is the usual go-to for building construction where strength is required. Also, tempered is way cheaper to make, than laminated.


By the way, in recent years, high end vehicles have begun using laminated glass on the side windows, because the inner, resin sheet can provide a noise dampening benefit. Although the window costs more it makes the cabin quieter.


N


Last edited by norm356; 05-17-2019 at 10:22 AM.
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post #38 of 40 (permalink) Old 05-17-2019, 07:24 AM
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Re: Shattered rear Window

Quote:
BIGGUY previously said: View Post
Rock off of FJ tire hit the trailer and ricocheted back into the window.

This is what happened to a friend of mine on our way to Moab.
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post #39 of 40 (permalink) Old 05-18-2019, 05:10 PM
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Re: Shattered rear Window

Any of those red strap buckles near the glass? It doesn't take a lot of force for car window glass to shatter with a pointy piece of metal. I've done it just throwing a BB at a window before.
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Re: Shattered rear Window

Quote:
Thevenerable previously said: View Post
Any of those red strap buckles near the glass? It doesn't take a lot of force for car window glass to shatter with a pointy piece of metal. I've done it just throwing a BB at a window before.


No, it was nothing loose on the inside.


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