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Old 11-02-2020, 03:37 PM   #1
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Brand: Thor Motor Coach
Model: Four Winds 31W
State: Tennessee
Posts: 5
THOR #21061
Thor Quality Issue - missing trim on Four Winds 31W

Hello, new quy here with a new to me 2017 Four Winds 31W, just picked up this beast from an estate sale it was nearly unused with 2700 miles on the clock.

However some Thor quality gremlins were present. Several issues, the Axxera radio was dead (replaced with a Pioneer, radio and cameras work great now), bottom screws missing from the mud guards in front of the rear dual wheels on both sides(screws replaced). So far, worst of all some trim pieces missing from the bottom of the coach panel just behind the cab of the chassis. These missing trim pieces have allowed water to penetrate the plywood on the drivers side and cause delamination and rot across the bottom of the panel and up about 4 inches. Pictures of the panel on the drivers side (behind and below running board) are attached.

I'm looking for suggestions on fixing the panel and where to purchase the missing U shaped aluminum trim parts.
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Old 11-02-2020, 03:58 PM   #2
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THOR #1469
Welcome to the forum.

Some folks have had good luck getting parts from Total Value RV in Elkhart, IN

Good luck and enjoy the travels.
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Old 11-02-2020, 04:19 PM   #3
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We're glad that you found us: welcome aboard!
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Old 11-02-2020, 05:22 PM   #4
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THOR #13932
It's a standard piece of channel available in aluminum or plastic on Amazon very inexpensive. Very easy to put on very easy to purchase. No need to call Thor.

Things shaped like the part you're looking for are commonly called Channel.
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Old 11-02-2020, 05:35 PM   #5
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Model: Fourwinds 24F
State: North Carolina
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THOR #9511
Thatís your wing wall - the other side will probably be the same. I had the same issue with my 2017 24F. I noticed it two years after the purchase. I called Thor and they had me take it to my dealer. The dealer told Thor it was a factory mistake, Thor confirmed that some units came off the line missing the bottom trim. Thor replaced both walls at no charge to me. It might be worth the call.
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Old 11-02-2020, 08:02 PM   #6
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Originally Posted by jimbo12 View Post
Thatís your wing wall - the other side will probably be the same. I had the same issue with my 2017 24F. I noticed it two years after the purchase. I called Thor and they had me take it to my dealer. The dealer told Thor it was a factory mistake, Thor confirmed that some units came off the line missing the bottom trim. Thor replaced both walls at no charge to me. It might be worth the call.


That is the best case and I hope it happens for you. It is a common failure point and you need to be certain where the water got in and fix it. It wonít always be the most obvious possibility. Then fix the wall. Simply replacing the channel really isnít enough - at least it wouldnít be for me. You need to remove the rot back to good material and replace it. If you canít do it yourself there certainly are people who can do it for you. Iíd recommend you spend an hour or so on your hands and knees on the roof and on a ladder examining the walls. Make sure every single seam, fixture, window and penetration has a smooth even well bonded bead of sealant. Self leveling lap sealant on the roof and urethane caulk on the sides. Resist every impulse to use silicone. This is THE best RV forum and youíll be glad you found it. Enjoy the ride!
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Old 11-02-2020, 09:12 PM   #7
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Brand: Thor Motor Coach
Model: Four Winds 31W
State: Tennessee
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THOR #21061
Many thanks for all of the helpful replies and advice!

I have contacted Thor customer service, they directed me to my local dealer and I have an appointment to have the missing trim/lower wing rot issues reviewed, the local dealer agreed to file a complaint with their Thor rep.

I'll also have the local dealer do an oil change and inspection while it's in the shop. Unfortunately my appointment is not until early January. I'll see what Thor will do for me and report back.

Worst case I purchased the channel trim from the dealer and also purchased the plywood and adhesives to fix the issue if Thor won't fix it as a factory mistake.
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Old 11-02-2020, 09:30 PM   #8
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Good. I have some factory pictures of these walls - I can't post them per dealer. They are pretty simple - 3/4" plywood clad in vinyl on the front. You can take the padded wall off on the inside of the coach and get a really good idea where the water penetration is and how far into the coach the damage is. Mine was all from the bottom - water wicking up the plywood. The inside padded wall has 6 buttons that pop off then you can remove the screws.
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Old 11-02-2020, 09:32 PM   #9
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Glad that things are moving forward; good luck!
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