To all 36QBOK owners.....

[Pbalmer65]

I have a 2014 36QBOk-7. As I wash my 5er a few times a year I noticed a hairline crack in the rear fiberglass of the main wall. Not thinking to much about it I went on washing. This list wash now has me very concerned. The hairline crack is now a thumb nail wide crack and also on both side of the unit...... If your having trouble trying to think where I'm speaking of if your standing in front or your outside kitchen look at the small section that is from the kitchen slide to the rear of the 5er. That corner at the top is the crack. Same location on the other slide as well. If I were a guessing man I would say the rear jacks is the cause of this issue. Thoughts?

[ependydad]

My first thought is, don't wash it! See what that causes?! Sorry, bad time for a joke.

And I'm dumb- I still can't see were you're talking. Can you take and post a pic?

[Pbalmer65]

Sorry it took so long to get pics posted. IMG_4411.jpeg IMG_4983.jpeg IMG_8322.jpeg IMG_9142.jpeg.

[Pbalmer65]

[VinceU]

Originally Posted by Pbalmer65

I have a 2014 36QBOk-7. As I wash my 5er a few times a year I noticed a hairline crack in the rear fiberglass of the main wall. Not thinking to much about it I went on washing. This list wash now has me very concerned. The hairline crack is now a thumb nail wide crack and also on both side of the unit...... If your having trouble trying to think where I'm speaking of if your standing in front or your outside kitchen look at the small section that is from the kitchen slide to the rear of the 5er. That corner at the top is the crack. Same location on the other slide as well. If I were a guessing man I would say the rear jacks is the cause of this issue. Thoughts?

That appears to be a anchor strip for the slide topper not installed. The slide side wall cut out has been working and the failure has propagated from the slide cutout to screw holes securing the strip. Hopefully you have extended warranty, it needs to be repaired both sides.

[MillerTime]

I would watch the crack as i ran the rear stabs up and down, but honestly i doubt it is caused from them. They would put stress further forward on the unit.

I would venture a guess that the pressure exerted on the top of the wall by the slide as it finished the extend cycle is what is causing it.
This would be easily verified by extending the slide out and watching the crack.

Either way, there is not going to be a good fix if this area is flexing. The best thing at this point would be to just put a nice bead of flexible seam sealer over the crack and just use the crack as an expansion joint. Any other fix other than a new sheet of filon won't hold up and will probably make it look even worse.