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Old 04-24-2015, 12:11 AM   #1
AcquaCow
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Default 2011 WRX: Blown out moonroof due to temperature change.

We just had a rather wild temperature swing here in DC, it went from 70F and sunny to 40F with a cold rain. My car has been parked in my driveway, hasn't moved in the last two days... came out this morning to find this:







I guess I should take better pics tomorrow and get them to a dealer... I'm not going to mess with cleaning out any of the glass until I can verify warranty status, and I can't really drive it to a dealer as-is w/o glass flying everywhere...

2011 WRX with 22k miles on it, should be covered...

-- Dave
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Old 04-24-2015, 12:27 AM   #2
Annihilator817
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I doubt the temperature change had anything to do with it.

Something probably fell from the tree in the reflection and impacted it during the storm you mentioned.

I don't think Subaru will cover that.
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Old 04-24-2015, 12:50 AM   #3
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Quote:
Originally Posted by Annihilator817 View Post
I doubt the temperature change had anything to do with it.

Something probably fell from the tree in the reflection and impacted it during the storm you mentioned.

I don't think Subaru will cover that.
There is nothing overhead of my car for 20ft in every direction, even then, something falling from that height wouldn't have enough force behind it to break tempered glass.

This is 100% some sort of flaw in the tempering of the glass. It's erupted up and outward from the car, not smashed inward due to impact.
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Old 04-24-2015, 12:52 AM   #4
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Similar incidents:

XV with a blown moon from temp: http://www.subaruxvforum.com/forum/p...d-sunroof.html

2011 outback moonroof explosion: http://www.subaruoutback.org/forums/...-explodes.html

2011 WRX moonroof explosion: http://forums.nasioc.com/forums/show....php?t=2104976
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Old 04-24-2015, 01:06 AM   #5
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Apparently if there's a bit of nickel sulfide stuck in the glass, all you need is direct sunlight on the panel and you can end up with the nickel sulfide changing state, causing the glass to explode.

This is apparently a pretty common reason tempered glass explodes.
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Old 04-24-2015, 02:26 AM   #6
Amazing Asian
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This has been a common problem and not the only story posted on this forum of it happening.
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Old 04-24-2015, 11:17 AM   #7
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Pyrex is known to blow up this way with a slight temp difference "if" there's a small crack or any fault now that's its tempered and using cheaper glass material. Not sure if it's happening the same way but kind of thinking I should just take a very light tint so the glass would still stay intact.
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Old 04-24-2015, 12:00 PM   #8
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Quote:
Originally Posted by AcquaCow View Post
There is nothing overhead of my car for 20ft in every direction, even then, something falling from that height wouldn't have enough force behind it to break tempered glass.

This is 100% some sort of flaw in the tempering of the glass. It's erupted up and outward from the car, not smashed inward due to impact.
Highly unlikely temperature had anything to do with it. Something, probably small, sharp, and pointy, hit the glass and bounced off. If it were a flaw in the glass, it would have broken long before now, your car was very likely made in 2010, so we are talking 5 years already.

Anyway, that was only 30 degrees difference. Trivial for any area of the US that isn't within a couple hundred miles of an ocean. Personally my car is in a heated garage in the winter which stays around 50-60 degrees. It gets to go outside in temperatures as low as -40, so up to 100 degree temperature change in a matter of seconds.
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Old 04-24-2015, 12:38 PM   #9
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Took some pics today with my real camera:
https://www.flickr.com/photos/acquac...7652090401886/







You can see the glass came upward and outward and is currently bowed up about 1" from the normal curve of the roof



There is nothing around the car in any direction that could fall on it... it just sits here in my driveway, parked in by my other subie:



Gonna see if I can send these pics to a local service advisor and see what they want to do about it.

-- Dave
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Old 04-24-2015, 01:07 PM   #10
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Well, that was quick... put a call into subaru, since I'm outside of the 3yr warranty, it's on me to get it fixed, they aren't going to cover it.

The part is $481 from subaru, and my deductible is $1000, so I'm just gonna pocket it and install myself.

Only 23k on the car too.

Joy.

-- Dave
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Old 04-24-2015, 01:30 PM   #11
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Quote:
Originally Posted by rkramer View Post
Highly unlikely temperature had anything to do with it. Something, probably small, sharp, and pointy, hit the glass and bounced off. If it were a flaw in the glass, it would have broken long before now, your car was very likely made in 2010, so we are talking 5 years already.
Actually nickel sulfide-inspired breakage is really common in the first 2-7 years, rarely up front and early in the life of the glass.

https://failures.wikispaces.com/Glas...ide+Inclusions
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Old 04-24-2015, 01:58 PM   #12
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Looks like it's just 2 bolts on each side and the whole panel lifts out... cake.


Last edited by AcquaCow; 04-24-2015 at 04:08 PM.
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Old 04-24-2015, 04:10 PM   #13
AcquaCow
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Just cleaned it up and covered it until the new panel shows up.








New panel is in stock and should ship tonight.

-- Dave
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Old 04-29-2015, 10:12 PM   #14
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New panel arrived today:


Dropped it in:


Lined it up:


All better.

Last edited by AcquaCow; 04-29-2015 at 10:19 PM.
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Old 04-30-2015, 10:00 AM   #15
Amazing Asian
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I guess on Kiro 7 news Seattle at 5pm tonight they're having Jesse Jones investigate exploding sunroofs
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Old 04-30-2015, 03:57 PM   #16
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I'm astounded to see this still happening. bummer it wasn't covered.
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Old 04-30-2015, 04:04 PM   #17
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Quote:
Originally Posted by AcquaCow View Post
Apparently if there's a bit of nickel sulfide stuck in the glass, all you need is direct sunlight on the panel and you can end up with the nickel sulfide changing state, causing the glass to explode.

This is apparently a pretty common reason tempered glass explodes.
Not really direct sunlight, just heat.

The building design community has been specifying heat-soaking of tempered glass for some time now. By heating up the tempered glass in the factory setting to about 200 F and holding for a few hours, you basically induce the breakage there, instead of on the building/car. Problem is, it does slightly reduce the strength of the glass slightly as it will affect the internal forces in the glass. I wonder if the auto industry just hasn't caught up yet, or if they're concerned about that strength loss.
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