How do ya tuck in those bumpers?

E28 technical advice asked and given! Troubleshooting, modifications and more.
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smackmybutter535i
Posts: 426
Joined: Feb 12, 2006 12:00 PM

Post by smackmybutter535i »

Any literature on this process or can somone walk me through?
RetiredDoc
Posts: 1316
Joined: Feb 12, 2006 12:00 PM
Location: Aiken SC

Post by RetiredDoc »

If you do a search using the term "bumper liposuction" both here and on roadfly.com, you will get a lot of information about the process.

If you do this liposuction, you will cause a gap at both bumper ends between the bumper and the black plastic trim. This is shown on the vehicle in this link.

http://www.geocities.com/dinanbmw/535is2.html

If the black trim piece above the bumper is wavy to begin with, the liposuction will also make this look more pronounced. However, new trim is available.
booker
Posts: 4354
Joined: Feb 12, 2006 12:00 PM
Location: New Orleans

Post by booker »

You need a drill, some safety goggles, and a desire to be covered with some weird goo.

You basically need to drill a hole in the bumper shock to releive the pressure of the goo that they are filled with. Use safety glasses, because it really shoots out with some serious pressure.You then need to give them a good push to "break the seal" and push all the rest of the goo out. I did this on my parts car, so I used the neighbors tree to push them in. At first I tried to inch up to the tree until it was snug. The tranny just stalled up and spun out in the rocks. I backed up, and took a 3' rolling start. Nothing. I then backed up and gave it a little goose and rolled int the tree pretty good. It pushed in one side, but not the other. I backed up and hit it lightly on the high side and it compressed, as well. After that, you could move them in and out freely.

I ended up not putting them on my car. It leaves a gap in the bumper rubber surround that is unsightly, to me:

Image

You can cut the rubber back to where the radius of the bumper matches up, but it still looks off, to me.

I sold them to a board member, eventually. I hope he enjoys them! I would try to get a set from a junkyard and drill and compress them. That way, if you don't like it, you have your stock set to put back on.
smackmybutter535i
Posts: 426
Joined: Feb 12, 2006 12:00 PM

Post by smackmybutter535i »

Any way to shave the rubber bumper surrounds to look like it is supposed to be like that?
Tjn182
Posts: 1782
Joined: Feb 12, 2006 12:00 PM
Location: Charlotte, NC

Post by Tjn182 »

I really haven't heard of anyone making the lipo look good. I did it on my rear and didn't care for it. I suppose you can lipo it a little without making it look awkward.
Layton
Posts: 562
Joined: Feb 12, 2006 12:00 PM

Post by Layton »

[QUOTE="smackmybutter535i"]Any way to shave the rubber bumper surrounds to look like it is supposed to be like that?[/QUOTE]

The PO did lipo on my car, and actually did a good job -- the rubber is trimmed on all four corners. I will be selling all four pieces + all compressed bumper shocks within the next 30 days or so -- if you're interested, let me know! I can also get some photos to you as well.
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