Window Cracking Spontaneously? - Toyota GR86, 86, FR-S and Subaru BRZ Forum

Bonburner · 02-10-2019, 12:37 AM

So I was driving on the freeway and I hear the window just make a sudden loud crack. But nothing hit it and there are no signs of anything bouncing off the window hitting anything else.

Has this happened to anybody else?

Impureclient · 02-10-2019, 01:03 AM

Here's an explanation of it: https://www.constructionspecifier.co...o-do-about-it/

humfrz · 02-10-2019, 01:21 AM

Nope, never happened to me.

I suggest that you will never know why it broke.

humfrz

Sapphireho · 02-10-2019, 02:24 AM

Yes. On my oven.

JD001 · 02-10-2019, 10:34 AM

Quote:

Originally Posted by Sapphireho

Yes. On my oven.

I thought it was "user" error... OP's issue looks like impact damage.

22R · 02-10-2019, 10:46 AM

I think a rock hit it from traffic and it was so quick and unexpected you could not have noticed. my 2 cents.
22R

Silverz · 02-10-2019, 11:08 AM

Snipers

BirdTRD · 02-10-2019, 12:23 PM

Wait, San Jose?....stray bullet.

ls1ac · 02-10-2019, 02:02 PM

I have had a few just break, usually on a hot day in the sun. The back window of a station wagon went and the bang was so loud I thought it was a shot. Side window put little pieces of glass all over the inside of the car. I was finding them for several years.

Tcoat · 02-10-2019, 03:20 PM

It could have been hit weeks or even months ago and just the right set of temperature, pressure and vibration set it off now. The brand new replacement windshield in my 58 Chev exploded the day after it was installed. They had installed it with a bit of a twist. Wasn't viable due to the wrap around nature of the glass but a bit a bump and BOOM.
Exploding windows can be a fairly common thing where the temperatures get really low.

Bonburner · 02-10-2019, 05:31 PM

Honestly I wouldn't say it was particularly low (compared to around the world), it was probably around 50*ish degrees F?

Here's a couple pics from the outside.

I just replaced a messed up windshield because of a rock and I'm familiar with various small pebbles and things hitting the car/windows. I really didn't hear anything along the lines of stuff hitting it.

Oh well.

Ultramaroon · 02-10-2019, 06:36 PM

Might have been something stupid like a scratch where the glass is clamped to the bracket.

humfrz · 02-10-2019, 06:48 PM

I'll go with this theory (that was lifted from @Impureclient 's reference, a few posts back).

"Frame-related breakage
Expansion and contraction of glass framing members may also lead to frame-related breakage—another common form of seemingly spontaneous failure. Such incidents occur when the gaskets, setting blocks, or edge blocks in a metal window or curtain wall frame are missing or do not sufficiently cushion the glass against glass-to-metal contact caused by temperature or wind-related movement. This can cause edge and surface damage to the glass as it comes in contact with the metal frame’s perimeter, producing stresses that eventually lead it to fail for no apparent reason."

humfrz

02-10-2019, 03:20 PM	#10
Tcoat He who smelt it... Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 63,222 Thanks: 55,995 Thanked 93,350 Times in 41,044 Posts Mentioned: 2276 Post(s) Tagged: 50 Thread(s)	It could have been hit weeks or even months ago and just the right set of temperature, pressure and vibration set it off now. The brand new replacement windshield in my 58 Chev exploded the day after it was installed. They had installed it with a bit of a twist. Wasn't viable due to the wrap around nature of the glass but a bit a bump and BOOM. Exploding windows can be a fairly common thing where the temperatures get really low. __________________ Racecar spelled backwards is Racecar, because Racecar.

02-10-2019, 06:36 PM	#12
Ultramaroon inverse square Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 25,760 Thanks: 39,496 Thanked 26,721 Times in 14,418 Posts Mentioned: 964 Post(s) Tagged: 9 Thread(s)	Might have been something stupid like a scratch where the glass is clamped to the bracket. __________________ service manuals

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02-10-2019, 01:03 AM	#2
Impureclient Your Mom is my Dad Join Date: May 2015 Drives: 2015 FR-S Location: NPR, Florida Posts: 2,397 Thanks: 1,792 Thanked 2,872 Times in 1,260 Posts Mentioned: 24 Post(s) Tagged: 2 Thread(s)	Here's an explanation of it: https://www.constructionspecifier.co...o-do-about-it/

02-10-2019, 01:21 AM	#3
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 27,000 Thanks: 23,832 Thanked 26,591 Times in 14,321 Posts Mentioned: 626 Post(s) Tagged: 2 Thread(s)	Nope, never happened to me. I suggest that you will never know why it broke. humfrz

02-10-2019, 02:24 AM	#4
Sapphireho Chicken tonight Join Date: Mar 2016 Drives: '15 JRSC twin, '06 Exige, '77 911s Location: Private Idaho Posts: 9,669 Thanks: 4,212 Thanked 11,457 Times in 5,896 Posts Mentioned: 115 Post(s) Tagged: 0 Thread(s)	Yes. On my oven.

02-10-2019, 10:46 AM	#6
22R 22R Join Date: Apr 2017 Drives: 2012 Camry SE 2017 Toyota 86 Location: South Louisiana Posts: 200 Thanks: 156 Thanked 93 Times in 60 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I think a rock hit it from traffic and it was so quick and unexpected you could not have noticed. my 2 cents. 22R

02-10-2019, 11:08 AM	#7
Silverz Senior Member Join Date: Dec 2018 Drives: Black frs Location: LA Posts: 103 Thanks: 1 Thanked 21 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Snipers

02-10-2019, 06:48 PM	#13
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 27,000 Thanks: 23,832 Thanked 26,591 Times in 14,321 Posts Mentioned: 626 Post(s) Tagged: 2 Thread(s)	I'll go with this theory (that was lifted from @Impureclient 's reference, a few posts back). "Frame-related breakage Expansion and contraction of glass framing members may also lead to frame-related breakage—another common form of seemingly spontaneous failure. Such incidents occur when the gaskets, setting blocks, or edge blocks in a metal window or curtain wall frame are missing or do not sufficiently cushion the glass against glass-to-metal contact caused by temperature or wind-related movement. This can cause edge and surface damage to the glass as it comes in contact with the metal frame’s perimeter, producing stresses that eventually lead it to fail for no apparent reason." humfrz

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