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  4. Rear window blew out while car was warming up E30

Rear window blew out while car was warming up E30

Scheduled Pinned Locked Moved BMW Discussion
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  • M
    M
    michael1972
    wrote on last edited by
    #1

    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.

    1 Reply Last reply
    0
    • ClassEC
      ClassEC
      ClassE
      wrote on last edited by
      #2

      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!

      1 Reply Last reply
      0
      • B
        B
        Boris3
        wrote on last edited by
        #3

        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

        1990 325i racecar (ITS, former Spec E30); 2004 330i ZHP

        1 Reply Last reply
        0
        • jc43089J
          jc43089J
          jc43089
          wrote on last edited by
          #4

          It is angry at being winter driven lol.

          Sent from my potato phone

          2/94 325i Sedan, Arctic Gray: UUC LTW FW, EVO 3 and DSSR, +.020 Maxsil pistons, ASC delete, Eibach shocks/springs, 16" contour reps 238k
          3/93 325i Coupe, Schwarz 2, Sketchy stance action, ebay turbo, 300k
          '89 325i Vert, Alpine White: 5spd swapped, sold.

          '04 Toyota Sienna: 24V to 24V swap in progress

          '05 Volvo V70R, 6spd.  200k
          '85 Toyota LandCruiser: Lifted, gas hog. 205k
          '99 Nissan Maxima: 5spd, Rusty but trusty winter beater. 252k RIP.

          1 Reply Last reply
          1
          • M
            M
            michael1972
            wrote on last edited by
            #5

            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.

            1 Reply Last reply
            0
            • GB-335xiCoupeG
              GB-335xiCoupeG
              GB-335xiCoupe
              wrote on last edited by
              #6

              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.

              • 2011 335xi Coupe Black Sapphire Metallic (e92/N55/ZPP/ZCW)
              • 2011 335xi Coupe Deep Sea Blue Metallic(e92/N55/ZPP/ZCW)

              Both on Drivewaymod.jpg

              1 Reply Last reply
              0
              • M
                M
                michael1972
                wrote on last edited by
                #7

                Just a pic of my blow out. New glass is finally in. We'll see how it goes.

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

                1 Reply Last reply
                0
                • YoungCRY
                  YoungCRY
                  YoungCR
                  wrote on last edited by
                  #8

                  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.

                  Chris Young
                  BMWCCA #458972
                  1986 528e/5  | 1994 530i/5 | 1995 540i/6 | 2013 X5 35d | 1998 C1500 Suburban | 1995 K2500 Suburban

                  1 Reply Last reply
                  0
                  • B
                    B
                    B C
                    wrote on last edited by
                    #9

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

                    1 Reply Last reply
                    0
                    • patsbimmer1P
                      patsbimmer1P
                      patsbimmer1
                      wrote on last edited by
                      #10

                      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.

                      2011 e90 M3 - DCT, Borla exhaust, BMW Performance Black Grille, ECS Painted Corners, Ziza Angel Eyes

                      07 335i Stella - sport package, BMS DCI, zhp knob, TMS cf parking brake lever, VRSF downpipes, MHD tune, H&R race springs, other stuff *SOLD*

                      97 328i Lola - sport package, m50 intake manifold, m50 manifold.com install kit, custom CAI, K&N filter, Borla exhaust, FK silverline coilovers, 25.5mm front sway bar, Powerflex front sway bushings, Turner Radiator, fan delete *sold*
                      95 325is *sold*
                      93 nissan 240sx KA-T *sold*

                      BMWCCA #473306

                      Instagram @patsbimmer1

                      AKA- HALLWAY PAT

                      "burnouts bring babes and babes dont have time for bushings" - Kaiser Rolls

                      1 Reply Last reply
                      1
                      • jc43089J
                        jc43089J
                        jc43089
                        wrote on last edited by
                        #11

                        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.

                        Sent from my potato phone

                        2/94 325i Sedan, Arctic Gray: UUC LTW FW, EVO 3 and DSSR, +.020 Maxsil pistons, ASC delete, Eibach shocks/springs, 16" contour reps 238k
                        3/93 325i Coupe, Schwarz 2, Sketchy stance action, ebay turbo, 300k
                        '89 325i Vert, Alpine White: 5spd swapped, sold.

                        '04 Toyota Sienna: 24V to 24V swap in progress

                        '05 Volvo V70R, 6spd.  200k
                        '85 Toyota LandCruiser: Lifted, gas hog. 205k
                        '99 Nissan Maxima: 5spd, Rusty but trusty winter beater. 252k RIP.

                        1 Reply Last reply
                        0
                        • M
                          M
                          michael1972
                          wrote on last edited by
                          #12

                          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.

                          1 Reply Last reply
                          0
                          • B
                            B
                            B C
                            wrote on last edited by
                            #13

                            jc43089 said:

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

                            Sent from my potato phone

                            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

                            1 Reply Last reply
                            0
                            • jc43089J
                              jc43089J
                              jc43089
                              wrote on last edited by
                              #14

                              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...

                              Sent from my potato phone

                              2/94 325i Sedan, Arctic Gray: UUC LTW FW, EVO 3 and DSSR, +.020 Maxsil pistons, ASC delete, Eibach shocks/springs, 16" contour reps 238k
                              3/93 325i Coupe, Schwarz 2, Sketchy stance action, ebay turbo, 300k
                              '89 325i Vert, Alpine White: 5spd swapped, sold.

                              '04 Toyota Sienna: 24V to 24V swap in progress

                              '05 Volvo V70R, 6spd.  200k
                              '85 Toyota LandCruiser: Lifted, gas hog. 205k
                              '99 Nissan Maxima: 5spd, Rusty but trusty winter beater. 252k RIP.

                              1 Reply Last reply
                              0
                              • B
                                B
                                B C
                                wrote on last edited by
                                #15

                                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

                                1 Reply Last reply
                                2
                                • B
                                  B
                                  Boris3
                                  wrote on last edited by
                                  #16

                                  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.

                                  1990 325i racecar (ITS, former Spec E30); 2004 330i ZHP

                                  1 Reply Last reply
                                  1
                                  • B
                                    B
                                    B C
                                    wrote on last edited by
                                    #17

                                    Or electrons that spilled out all over the back seat

                                    1 Reply Last reply
                                    0
                                    • GB-335xiCoupeG
                                      GB-335xiCoupeG
                                      GB-335xiCoupe
                                      wrote on last edited by
                                      #18

                                      Flashbacks to Pulp Fiction where Vince shoots Marvin on accident.

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

                                      • 2011 335xi Coupe Black Sapphire Metallic (e92/N55/ZPP/ZCW)
                                      • 2011 335xi Coupe Deep Sea Blue Metallic(e92/N55/ZPP/ZCW)

                                      Both on Drivewaymod.jpg

                                      1 Reply Last reply
                                      1
                                      • patsbimmer1P
                                        patsbimmer1P
                                        patsbimmer1
                                        wrote on last edited by
                                        #19

                                        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!

                                        2011 e90 M3 - DCT, Borla exhaust, BMW Performance Black Grille, ECS Painted Corners, Ziza Angel Eyes

                                        07 335i Stella - sport package, BMS DCI, zhp knob, TMS cf parking brake lever, VRSF downpipes, MHD tune, H&R race springs, other stuff *SOLD*

                                        97 328i Lola - sport package, m50 intake manifold, m50 manifold.com install kit, custom CAI, K&N filter, Borla exhaust, FK silverline coilovers, 25.5mm front sway bar, Powerflex front sway bushings, Turner Radiator, fan delete *sold*
                                        95 325is *sold*
                                        93 nissan 240sx KA-T *sold*

                                        BMWCCA #473306

                                        Instagram @patsbimmer1

                                        AKA- HALLWAY PAT

                                        "burnouts bring babes and babes dont have time for bushings" - Kaiser Rolls

                                        1 Reply Last reply
                                        0
                                        • M
                                          M
                                          michael1972
                                          wrote on last edited by
                                          #20

                                          No mini sledge I swear

                                          1 Reply Last reply
                                          0

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