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Go Back   E46Fanatics > Tuning & Tech > DIY: Do It Yourself

DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 12-20-2005, 09:52 PM   #1
Activ3
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DIY: Fender Rolling

Well today GIO_21 and I were bored, so we adjusted my coilovers and washed the cars, then sat and did nothing... after realizing that both of our cars had rubbing problems in the rear, we decided to roll our fenders, hehe.

Step 1: Remove the filling under the fender

Our cars have this rubberish filling between the fender and lip preventing the fender from being rolled competely. You have to remove as much of it as you can in order to begin rolling. We used a small flathead and an hours worth of elbow grease to get it most of it out. My car was a pain in the ass since I had so much of the filling, and it was so hard to come out. GIO's car had less filling and it came out with the touch of a finger, lucky bastard, lol. Well anyways, just get as much out as possible so that you can feel the sharp edge of the fender. You have to jack up your car and put it on a jackstand to work at it, unless you want to just remove your wheel.

Step 2: Find an old baseball bat and some fat friends

Luckily Gio plays baseball, so he had a ton of bats, we just grabbed an old beat up one.

Jack the car up and place the bat between the tire and fender, then lower the jack completely so that the bat is now stuck between the tire and fender. Make sure you place the bat at either the front or rear of the rear fender.

Open your trunk and get a few of your bigger buddies to sit on the trunk ledge so that the car sinks and puts even more pressure on the bat between the tire and fender.


Step 3: Roll it!

Find a trustworthy friend and have him hold the bat and press down on it, getting it as vertical as possible. Turn on your car and keep the door or window open so you can communicate with your trusty friend. If you placed the bat at the front of the fender, but your car in reverse and slowly roll it backwards while your trusty friend pressed the bat and moves with it as it rolls along the fender backwards. Do the same if you placed the bat at the rear of the fender, except with the car in 1st gear or Drive if you have a step.

Repeat this about 3 or 4 times. Jack up your car and remove the bat. Your fender should now be rolled!



Some people may consider this way cheap and stupid, but it definatley worked for us, and it saved us the time and money of getting it done at a shop. Our fenders did not have any paint crack or anything, and there was no visible difference outside. However, the metal under the fender is now rolled upwards noticeably, and we both no longer have rubbing problems
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Old 12-20-2005, 11:42 PM   #2
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amazing....I will consider this!!!! and put it in my favorites
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Old 12-21-2005, 10:59 AM   #3
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Very creative!
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Old 12-21-2005, 11:04 AM   #4
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im trying to get a visual of all this happening....i cant...some pics would have been awesome.
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Old 12-21-2005, 04:47 PM   #5
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i did this when i was like 18....
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Old 12-21-2005, 05:07 PM   #6
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hahhaha, David, that should be interesting.

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Old 12-21-2005, 05:46 PM   #7
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Sounds interesting, and very creative, but if I have to roll my fenders, I think I would just buy the tool from tirerack or take it to a shop.
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Old 12-21-2005, 05:48 PM   #8
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lol once I got most of that crap filling out, I could see exactly what had to be done, and how easily it could be done. Ken, if you ride out to tropical tomorrow, check out mine or gios fenders, hehe.
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Old 12-21-2005, 05:55 PM   #9
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sounds scary haha - post up some pictures of the beating
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Old 12-21-2005, 07:17 PM   #10
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damn i wouldnt have the guts to try that.... NICE
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Old 01-01-2006, 10:34 AM   #11
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sounds funny as hell to watch.
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Old 01-02-2006, 03:16 PM   #12
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you also have to be very carful when dropping the car down, as too not let the bat make a huge dent in the quarter.

And if you dont have a trusty friend, rather then rolling the car, you can roll the bat instead by your self.

Another precation for paint is to heat it up, preferably with a heat gun till its hot. A hair dryer will work, but you will be heating it u for a while.
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Old 01-03-2006, 01:20 PM   #13
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This sounds exactly like what the guy at HW Motorsports did with my car. I payed $100 for both fenders (got ripped off, coulda done it myself). He comes out with a big metal bar (not as thick as a baseball bat). He pops the trunk, tells me and my buddy to sit on the edge of the trunk, and then he starts prying up the fender with the metal bat. Took about 5 minutes for each side. Cheap@ss shop didn't tell me that this was their version of a "professional fender roll"....my fault for not asking. I still get some rubbing in the back, but there is no visible wear on the outer tire wall...the tire is probably rubbing on the inner edge.
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Old 01-03-2006, 08:42 PM   #14
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I tried that baseball bat sh*t with my E30 and f****d up both rear quarters doing it.
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Old 03-13-2006, 05:47 AM   #15
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Lol
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Old 02-09-2008, 10:00 PM   #16
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I'm in the same boat and it looks like I need to remove the liner before I can roll the fender.

What purpose does the liner serve and by removing it what potential problems would I have to deal with?
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Old 02-10-2008, 06:24 PM   #17
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Cool

anybody know?!?!?
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Old 02-11-2008, 10:48 AM   #18
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I'm guessing to prevent rust?
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Old 02-12-2008, 03:15 AM   #19
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The bat trick has been around forever, but I could never actually figure out how it worked untill I read this write up, it all makes sence now!

That "filling" is called under coat... or at least that is what you call it if you don't want to sound like you have no idea what you are talking about. you can get is a spray can but what the factory uses is actually more like spray-on seam sealer.

Its there for weather proofing, and road noise.(and to weight the car down so it goes slower.)
If you diddnt have it all over the car it would sound like you were riding in a snare drum.

The only thing removing under coating from that spot would hurt is if you plan on driving on salt roads it could be a big problem with rust becasue that is a prime spot for it.

I just used a plastic hammer on my fender lips and it came out so perfect it was not very hard either, I diddnt completely smash them though I just got it out of the way.

It would probably be a smart idea to put tape or mark the bat so the bat veries in thickness, so you can go at it more gradually and controlled, rather than going from nothing to fully smashed in one roll.

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Old 02-16-2008, 03:17 AM   #20
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I'm guessing to prevent rust?
hmmm...
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The bat trick has been around forever, but I could never actually figure out how it worked untill I read this write up, it all makes sence now!

That "filling" is called under coat... or at least that is what you call it if you don't want to sound like you have no idea what you are talking about. you can get is a spray can but what the factory uses is actually more like spray-on seam sealer.

Its there for weather proofing, and road noise.(and to weight the car down so it goes slower.)
If you diddnt have it all over the car it would sound like you were riding in a snare drum.

The only thing removing under coating from that spot would hurt is if you plan on driving on salt roads it could be a big problem with rust becasue that is a prime spot for it.

I just used a plastic hammer on my fender lips and it came out so perfect it was not very hard either, I diddnt completely smash them though I just got it out of the way.
Well since I don't live in an area that get's any snow I guess I shouldn't be too concerned. If I wanted to reapply new undercoating how would I do that?

Thanks for the info.
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