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Old 05-13-2022, 05:55 PM   #1
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Broken windshield-what is my coach telling me?

So there I was, exiting a rv park. I'm driving, slowly, through the narrow roads. This park had a bunch of speed bumps. I went over one bump, and was surprised by the extreme jolt. There was a large Crack noise as well, which make me think of lumber cracking.

I inspected my woodwork I added to support the MCD blinds I added. Everything was fine.

2 weeks later, I noticed a large horizontal crack in the uppermost region of my driver windshield.

So, why did this happen?

The windshield appears to be 15 years old. The seals might have aged and became stiff.
Being this old, the windshield has a lot rock strikes that have been repaired. Maybe the right amount of flex and impact was just enough.

The shocks are fine and coach is driving great. I routinely hit jarring bumps on bridges at 60mph without issues.

This is a split windshield and the newer passenger side is doing fine.
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Old 05-13-2022, 06:11 PM   #2
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If the crack runs through a previous repair ; there's your answer .

Particularly if the repair was close to the edge of the glass.
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Old 05-13-2022, 06:29 PM   #3
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Thanks Skip.

I got out my ladder and inspected. The crack is 30 inches long left to right. It appears to travel through 2 pockmarks. Small rock strikes. There are several repairs about 10 inches lower.

I also inspected the windshield seals. Very stiff. Not flexible. I'm thinking the windshield didn't have the flex support it needs.

I'm just troubled that this happened at a 10mph speed. I don't want to replace the windshield just to have it happen again.
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Old 05-13-2022, 06:42 PM   #4
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I've had windshields crack from temp differential ; sat for 5 mins in A&W waiting for my burger with defrost on then pulled on to the street in sub freezing temps , accelerated to 35 mph and POW cracked top to bottom , no bumps just cold air hitting a hot windshield with a small flaw .
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Old 05-13-2022, 06:49 PM   #5
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I’ve had two windshields crack just sitting. Fine in the evening, cracked in the morning……this in very mild weather with minimal temperature swings.
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Old 05-14-2022, 01:12 PM   #6
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In the 3 years I have owned my coach I have had 8 driver side windshield installs. Last year I decided that I likely don't have the support I need for the front cabinets, so I added a truck bed bar to provide support for the cabinets(redneck fix). I keep it very tight in pressure. Since then I have put over 8k miles on the coach and hit lots of bad bumps, and windshield is holding up( knock on wood). I will continue with this apparent fix....
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