Windscreen crack

Faults and Technical chat for the Honda E
turntoport
Posts: 127
Joined: Mon Aug 09, 2021 9:54 am

Post by turntoport » Sat Aug 21, 2021 8:21 pm

yep, it's almost certainly a stress crack, and quite possibly caused by differential expansion of the car frame due to our sun-pal. [There's a thread relating to Caustic's rear screen 'bombed'; the latter is probably knobhead-caused (quite possibly with a fragment of fractured spark-plug ceramic) but there's a relationship here: Fracture mechanics. (See:
https://www.fracturemechanics.org/griffith.html )]

or if you fancy a chuckle, try googlying
'Giffith crack equation' and see what comes-up first. Appropriate, lol.
Not that your screen is a laughing matter: The centre sensor unit, being glued onto the screen, has apparently worked both as a local reinforcement/stiffener, but also a stress concentrator, for the glass.

If you fancy, having made some assumptions about the glass properties and estimated it's dimensions, you could calculate the maximum size surface flaw (fracture) that would not cause brittle (sudden) crack progression, but it's quite small. Very small. So it's a good idea to frequently check the screen and rapidly get any crack 'repaired' (i believe acrylic material is used to 'glue' the crack edges together and so prevent propagation).

I notice your car is dark grey: dark colours will obs exacerbate differential expansion, especially if the car goes from a relatively cool/cold environment to 1kW/m2 full-bore sunshine. But it seems to have happened to a few people, so i'm guessing there may be an issue with either the screen bead (too stiff/incorrectly fitted) or body stiffness - probably (hopefully) the former. Do Honda keep a database of this non-dealer failure-correction stuff?
good luck.

p.s. screen emergency repair kits cost about a tenner; think i'll get one when my e arrives.

MattHero
Posts: 234
Joined: Fri Aug 21, 2020 2:17 pm

Post by MattHero » Wed Apr 06, 2022 6:07 pm

PXL_20220406_165847247.jpg

My turn this time. Yesterday, nothing. Today a 40cm crack right from bottom edge into the middle of screen. Windscreen cover enable, 3 weeks to wait for replacement.

Meh.
Advance Charge Yellow on 16s.

zemdega
Posts: 55
Joined: Tue Jan 25, 2022 4:45 pm

Post by zemdega » Wed Apr 06, 2022 6:51 pm

I had super small crack on my A3 passenger side top corner. It took this crack about 2 years to get to the middle of windshield. As it wasn't on drivers side I got away with it in tech checks. Changed windshield just before selling it. Wasn't too much as it was from China. It's probably not so easy with Honda.

MattHero
Posts: 234
Joined: Fri Aug 21, 2020 2:17 pm

Post by MattHero » Wed May 11, 2022 3:42 pm

PXL_20220511_153754371.jpg

Windscreen finally replaced today by Autoglass. Chunk of missing paintwork on bonnet edge by wipers, definitely wasn't there when I dropped it off, they claim it couldn't have been them during their work. All very frustrating.
Advance Charge Yellow on 16s.

MaXPainT
Posts: 41
Joined: Wed Feb 16, 2022 6:34 pm

Post by MaXPainT » Wed May 11, 2022 7:11 pm

The wipers were lifted without putting them in the maintenance mode. Classic mistake, the issue is present on all cars at my dealer's.

Sad to hear that after all the trouble with the glass replacement you ended up with a chipped bonnet :(

MattHero
Posts: 234
Joined: Fri Aug 21, 2020 2:17 pm

Post by MattHero » Wed May 11, 2022 8:28 pm

MaXPainT wrote:
Wed May 11, 2022 7:11 pm
The wipers were lifted without putting them in the maintenance mode. Classic mistake, the issue is present on all cars at my dealer's.

Sad to hear that after all the trouble with the glass replacement you ended up with a chipped bonnet :(
And that's what I told them they'd done. They said they'd lifted the bonnet, removed the arms that way to get at the valance panel etc. I couldn't prove they done it, even though there were still paint chips present. Meh.
Advance Charge Yellow on 16s.

User avatar
ARTEM
Posts: 9
Joined: Mon Sep 12, 2022 8:43 am

Post by ARTEM » Mon Sep 12, 2022 1:02 pm

if you have a replacement order from a Honda dealer, please send a photo of it. It may have a spare part number(OEM) for the windshield

bossjohnc
Posts: 29
Joined: Mon Jun 14, 2021 8:49 am

Post by bossjohnc » Fri Sep 16, 2022 10:46 am

My turn - small chip that happened about a week ago spread over the passenger side before I got to it :(

Hoping that I get genuine parts and a heated screen from my insurer.

Will try to get some part numbers.

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