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Old 12-04-2014, 01:51 PM   #1
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sidewall crack

I just found a crack in the sidewall of my 3170ds. It is on the driver side under the slide out near the hot water heater.. I have an appointment with dealer 9 Jan 2015 look at it. Is this a common problem?
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Old 12-04-2014, 08:45 PM   #2
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I think this is a common issue and not easily fixed.
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Old 12-05-2014, 11:44 PM   #3
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We have a 2012 3170 with the famous crack. The crack extends at a 45° angle downward from the lower rear corner of the driver side slide cutout. There has been much discussion about the crack on this forum, some people claiming it to be the result of a serious structural defect. Some say the crack is caused by a missed well in the aluminum superstructure. Forest River has apparently agreed to fix some of them. In order to make the weld, the fiberglass skin must be ground out in a three or 4 inch circle so the heat of the weld will not damage the fiberglass and then that fiberglass, and the corresponding gelcoat, replaced. I took a less invasive route. If there is a missed weld I left it and with a Dremel tool ground out about a quarter inch groove to grind out the crack from the gelcoat. There was no visual indication of any cracking of the fiberglass wall itself. I filled the quarter inch groove with flexible epoxy and put a short piece of white electrical tape over it to keep sun off of it. The fix is about one quarter inch wide in about 1 1/2 inches long. You'll never notice it and I haven't ground out a 4 inch hole in the fiberglass wall of the coach. I've had fiberglass boats patched before, and the patch color is never right. If for no other reason, because the patch will fade differently than the original gelcoat. We have a total of 19,000 miles on the unit. We have put 4000 miles on the unit since the fix, some of those miles on a very rough pavement, and there is no further cracking.



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Old 12-06-2014, 12:04 AM   #4
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IMHO I'd be concerned that fixing the fiber glass crack with flexible epoxy just masks the problem. The fiber glass can't crack like that unless the aluminum structural members which it is bonded to are also cracked. However if the crack hasn't progressed that's a good thing. So far the aluminum structure probably is not cracking any further.
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Old 12-06-2014, 09:36 AM   #5
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FR repaired mine under warranty. Dealer in NC did a great job. Required aluminum welding. Personally I am happier it is fixed than patched.
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Old 12-08-2014, 05:20 PM   #6
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I had mine repaired with approval by Forest River by a group in Ocala, Florida who used to work at the factory. They repaired from the inside with a gusset plate. They then repaired the fiberglass. The total was something $550 under warranty. Forest River was easy to deal with even though I had the coach longer than 1 year.


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Old 12-09-2014, 09:27 AM   #7
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I am looking at buying a 2011 Sunseeker 3170. I am meeting a private seller in a week. I would like to look for the "famous crack". I was unable to open the last picture posted. Does anyone else have a photo I could look at. Other then the standard checklists is there anything else in particular I should look for with this model.

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Old 12-12-2014, 02:55 PM   #8
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I just had the same problem on my 3170. Noticed it this morning after three days in a row of 50+ mph winds. When the wind came up, I would pull the slide in, but guess I didn't catch it in time, now I have a stress crack. Same place. I'm getting mine looked at tomorrow.
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Old 12-12-2014, 05:01 PM   #9
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Forest River is going to cover my stress crack. 574-206-7600, ask for Russ in Sunseeker Warranties,

I have to drive 100 miles to an authorized dealer. Mine will probably be a week because it will have to be farmed out to a body shop as opposed to the lucky person who went to North Carolina and had it fixed in two days....
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Old 12-13-2014, 05:31 PM   #10
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Is the crack structure or cosmetic? We also have the infamous crack.


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