<![CDATA[Rear window blew out while car was warming up E30]]>WTF would cause this? I was sitting in my car this morning warming it up rear defroster was on. I hear a loud bang. Thought the car backfired. Go to back out the driveway and glass falls into the car from the rear window. Whole thing spiderwebbed.

]]>https://wibimmers.com/topic/3358/rear-window-blew-out-while-car-was-warming-up-e30RSS for NodeWed, 16 Sep 2026 04:52:02 GMTSat, 20 Dec 2014 00:49:59 GMT60<![CDATA[Reply to Rear window blew out while car was warming up E30 on Tue, 30 Dec 2014 03:58:24 GMT]]>Damn I'm disconnecting my rear defrost! That's crazy.

]]>https://wibimmers.com/post/51891https://wibimmers.com/post/51891Tue, 30 Dec 2014 03:58:24 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sun, 28 Dec 2014 21:05:56 GMT]]>b5ce56790d49eb2bff254990620bc00c.jpg

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]]>https://wibimmers.com/post/51820https://wibimmers.com/post/51820Sun, 28 Dec 2014 21:05:56 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sun, 28 Dec 2014 20:59:52 GMT]]>This exact same scenic happened to me in my e30 about 4 years ago. I got a new rear window and installed it myself. It took me a few hours to do but it wasn't very difficult. Used silicone spray and my Wisconsin I.D.

]]>https://wibimmers.com/post/51819https://wibimmers.com/post/51819Sun, 28 Dec 2014 20:59:52 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 19:20:50 GMT]]>No mini sledge I swear

]]>https://wibimmers.com/post/51748https://wibimmers.com/post/51748Fri, 26 Dec 2014 19:20:50 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 15:51:44 GMT]]>

GB-335xiCoupe said:

Flashbacks to Pulp Fiction where Vince shoots Marvin on accident.

www.youtube.com/watch?v=LBBni_-tMNs

Pulp Fiction has some of my all time favorite movie scenes!  Good choice!

]]>https://wibimmers.com/post/51722https://wibimmers.com/post/51722Fri, 26 Dec 2014 15:51:44 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 15:45:03 GMT]]>Flashbacks to Pulp Fiction where Vince shoots Marvin on accident.

www.youtube.com/watch?v=LBBni_-tMNs

]]>https://wibimmers.com/post/51719https://wibimmers.com/post/51719Fri, 26 Dec 2014 15:45:03 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 13:54:34 GMT]]>Or electrons that spilled out all over the back seat

]]>https://wibimmers.com/post/51711https://wibimmers.com/post/51711Fri, 26 Dec 2014 13:54:34 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 12:57:34 GMT]]>I'm with Snap, though wondering about the mini-sledge scenario? Given the hole I'd start checking for shotgun pellets...have any irate neighbors, ex-s, etc.

]]>https://wibimmers.com/post/51708https://wibimmers.com/post/51708Fri, 26 Dec 2014 12:57:34 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 10:06:03 GMT]]>So what REALLY happened is Mike chucked a mini-sledge through the window to attempt insurance fraud.

i cant electrical maths

F*** electrons

I'll use an ice scraper

]]>https://wibimmers.com/post/51706https://wibimmers.com/post/51706Fri, 26 Dec 2014 10:06:03 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Fri, 26 Dec 2014 04:18:41 GMT]]>

Snap said:

If the grid is wired in parallel then voltage is constant through the circuit but current is the independent variable.

Ohm's law V=I*R Would say that you are right and that resistance would have to drop for current to increase for a given voltage. SO im thinking some of the lines no longer had a complete circuit/were bad and the remaining lines had to carry more current which caused the hot spot

But if resistance remains the same on the individual wires (how would it decrease) then overall resistance increases when one or more breaks. Ohm's lawed like a boss. 1/(1/r1+1/r2 etc) formula might not be right, lots of eggnog with brandy today...

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]]>https://wibimmers.com/post/51705https://wibimmers.com/post/51705Fri, 26 Dec 2014 04:18:41 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Thu, 25 Dec 2014 20:27:21 GMT]]>

jc43089 said:

You mean low resistance? Not sure how that would happen when they are already just a thin wire.

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If the grid is wired in parallel then voltage is constant through the circuit but current is the independent variable.

Ohm's law V=I*R Would say that you are right and that resistance would have to drop for current to increase for a given voltage. SO im thinking some of the lines no longer had a complete circuit/were bad and the remaining lines had to carry more current which caused the hot spot

]]>https://wibimmers.com/post/51701https://wibimmers.com/post/51701Thu, 25 Dec 2014 20:27:21 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Thu, 25 Dec 2014 19:23:09 GMT]]>Yea the whole widow spiderwebbed. I'm not saying it was or wasn't defrost related but the glass guy said he has seen it happen on other vehicles from the defroster causing a hot spot. So strange. It popped loud as hell.

]]>https://wibimmers.com/post/51700https://wibimmers.com/post/51700Thu, 25 Dec 2014 19:23:09 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Wed, 24 Dec 2014 14:34:26 GMT]]>

Snap said:

There was probably a high resistance spot in one of the lines that became extra hot

You mean low resistance? Not sure how that would happen when they are already just a thin wire.

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]]>https://wibimmers.com/post/51651https://wibimmers.com/post/51651Wed, 24 Dec 2014 14:34:26 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Wed, 24 Dec 2014 13:46:53 GMT]]>

CYoung said:

that seems really odd to me being just a section that went out. You would think if it was heat related it would have spread all the way across.

It looks like it shattered the entire window just coincidence that that exact chunk crumbled.

]]>https://wibimmers.com/post/51648https://wibimmers.com/post/51648Wed, 24 Dec 2014 13:46:53 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Wed, 24 Dec 2014 10:10:56 GMT]]>There was probably a high resistance spot in one of the lines that became extra hot

]]>https://wibimmers.com/post/51645https://wibimmers.com/post/51645Wed, 24 Dec 2014 10:10:56 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Wed, 24 Dec 2014 08:53:49 GMT]]>that seems really odd to me being just a section that went out. You would think if it was heat related it would have spread all the way across.

]]>https://wibimmers.com/post/51642https://wibimmers.com/post/51642Wed, 24 Dec 2014 08:53:49 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Wed, 24 Dec 2014 01:49:01 GMT]]>Just a pic of my blow out. New glass is finally in. We'll see how it goes.

post-2797-0-50783300-1419385783thumb.jp

]]>https://wibimmers.com/post/51630https://wibimmers.com/post/51630Wed, 24 Dec 2014 01:49:01 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sat, 20 Dec 2014 14:02:45 GMT]]>

michael1972 said:

Well I was supposed to get it replaced tomorrow at safelite but they screwed up and don't actually have the glass in the warehouse that the computer said they did. So now it should be Tuesday.

Bastages.

]]>https://wibimmers.com/post/51470https://wibimmers.com/post/51470Sat, 20 Dec 2014 14:02:45 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sat, 20 Dec 2014 04:53:12 GMT]]>Well I was supposed to get it replaced tomorrow at safelite but they screwed up and don't actually have the glass in the warehouse that the computer said they did. So now it should be Tuesday.

]]>https://wibimmers.com/post/51468https://wibimmers.com/post/51468Sat, 20 Dec 2014 04:53:12 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sat, 20 Dec 2014 02:28:31 GMT]]>It is angry at being winter driven lol.

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]]>https://wibimmers.com/post/51467https://wibimmers.com/post/51467Sat, 20 Dec 2014 02:28:31 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sat, 20 Dec 2014 01:33:07 GMT]]>That's not good. Glad no one was sitting in the rear!

Switch issue or replacement window install issue:

http://www.bimmerforums.com/forum/showthread.php?1731572-Rear-Defroster-breaking-rear-window

]]>https://wibimmers.com/post/51466https://wibimmers.com/post/51466Sat, 20 Dec 2014 01:33:07 GMT<![CDATA[Reply to Rear window blew out while car was warming up E30 on Sat, 20 Dec 2014 00:56:27 GMT]]>I've heard if that before - I think the defrost button sticks on and the rear defrost keeps going until the heat difference cracks the glass?!?

That really sucks tho!

]]>https://wibimmers.com/post/51465https://wibimmers.com/post/51465Sat, 20 Dec 2014 00:56:27 GMT