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General E46 Forum
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Old 04-29-2017, 11:23 PM   #1
nellie330
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Fender flare/quarterpanel cutting question

Looking for some opinions on methods for installing my Hard Motorsports flares i have coming in the mail. I'm currently living in barracks and the plan is to do the install in the parking lot one of these upcoming weekends so im hoping to make sure i have everything ready to go. My big question is in regards to the 2 layers once the rear quarterpanel is cut. One option would be to bend the inner layer into the outer layer, weld and seal. the other option would potentially be to add some kind of expanding foam/water sealant sort of deal in between the two layers, bend the inner layer in and paint to prevent rust. I would obviously like to avoid trying to source a welder, i would most likely just have to get the welding done at a shop. im just concerned as to whether or not the second option wouldn't be structurally sound. if anyone has an opinion on this it would be greatly appreciated!
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Old 05-03-2017, 02:11 PM   #2
nellie330
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Bump, anyone have an opinion?


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Old 05-03-2017, 05:47 PM   #3
evanr614
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i've seen maybe 1 or 2 E46's on here with fender flares. im going to keep my opinion to myself on this one, but maybe search some other forums/internet sources on installing fender flares
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Old 05-03-2017, 05:53 PM   #4
Geo31
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The inner and outer fender do form an important structural component. You're right to be concerned about this. True structural foam (you need to be VERY careful about selection and would likely have to order it on-line) is amazingly strong. That said, I'd personally want to weld the inner and outer together. I have a friend who is an automotive engineer and he saw a car fold up going over a heavy bump (rally car maybe?) where the owner didn't weld the two together. Sure you won't be rallying, but seriously? A car folding up because of this, even in a rally, is pretty serious.
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Old 05-03-2017, 07:12 PM   #5
nellie330
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Quote:
Originally Posted by Geo31 View Post
The inner and outer fender do form an important structural component. You're right to be concerned about this. True structural foam (you need to be VERY careful about selection and would likely have to order it on-line) is amazingly strong. That said, I'd personally want to weld the inner and outer together. I have a friend who is an automotive engineer and he saw a car fold up going over a heavy bump (rally car maybe?) where the owner didn't weld the two together. Sure you won't be rallying, but seriously? A car folding up because of this, even in a rally, is pretty serious.


That's a solid point. I'm running some harsh suspension on shotty roads so it's probably for the best to do the extra welding.


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Old 05-04-2017, 12:40 AM   #6
TobyB
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Weld it up.
Carefully- you can shrink the outer panel if you go nuts-
short stitches, cooling, move around until it's dimensionally stable.

I did 1 car, once. It's a lot of work...

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