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Thread: Seat Back Clip Repair.

  1. #1

    Seat Back Clip Repair.

    These shots were sent in by braindilley, and clearly illustrate the seat back clips that have failed on several cars. They are a very tight fit, and take quite some work to slot back in place once they are glued. The glue info come from our team chemical engineer, FWK-Z8

    1.) Clean both surfaces with a fine 80-100 grit sandpaper to remove any residual adhesive/roughen up the mating surfaces.

    2.) Spread a thin coat of cyanoacrylate (like MXBON 105, or any other good industrial superglue) to each surface - make sure you get it to the edges of the parts so as to eliminate stress concentrations that would allow peel.

    3.) After getting the initial adhesion, run a bead around the perimeter of the clips to allow the adhesive to get in by capillary force . If possible clamp the two pieces together for about 2 hours.

    4.) Wait overnight before reinstalling the shells.

    5.) The top hooks, which are the ones that fail, slide up to engage. The bottom ones push in when the top hooks are fully engaged. The hardest part of the fix is re-installing the seat back. Due to the thickness of the leather, it's difficult to get the top hooks to "click" in place. Go slow, be patient, and you'll eventually get it.
     
    Andrew Macpherson

    Expert Z8 Inspections, with full support for both Z8 sale and purchases.

  2. #2
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    I have "fixed" my seat clips numerous times; but eventually they come loose again.
    I notice that they flex whenever you enter or leave the car (driver or passenger) ad this pressure eventually breaks them loose.

    Has anyone discovered a permanent fix?

    I Squared

  3. #3
    Team Z8 jawz's Avatar
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    Not sure it applies, but I haven't noticed any ALPINAs with this problem. Andrew would probably have info on this, though if they have. The ALPINA seat backs are different than the Z8 (they're not glossy), but the entire seat could also be different as far as I know. I don't think that's the case, but may be something to check out.

  4. #4
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    Quote Originally Posted by I Squared View Post
    I have "fixed" my seat clips numerous times; but eventually they come loose again.
    I notice that they flex whenever you enter or leave the car (driver or passenger) ad this pressure eventually breaks them loose.

    Has anyone discovered a permanent fix?

    I Squared
    Hard plastic glue for PVC tubes. Never game off again (4 years now)
    Z8Ros

  5. #5
    Sorry for reviving an old post:

    I lost one of the clips from the seatback. It seems when I got the car detailed it fell off and was lost. The problem I face now is how do I find a replacement clip? The dealer only lists the entire seat back.

  6. #6
    Make certain the clip didn't fall down into the gut of the seat back, I seem to recall fishing one out of there when I addressed this problem. My guess is you will not be able to purchase the clip separately from the entire seat back shell. If you are unable to find or replace the missing piece, try installing it with just the one remaining clip. I think it will hold it in place firmly enough that no one but you will know.

    Bill

  7. #7
    Hi Bill,
    Thanks for the tip. I did install the RT hand clip> It held but I have a quarter to a half inch gap still. The unprimed seat back piece is about $440.

    It is one of those things that bug me when I get into the car. You are right, only I will notice it...OR one of the Z8 guys will, then I will be an outcast with a defective Z8! ( JUST KIDDING) I am bugged that the clip was lost. I can see it on the floor of the detail shop right now.

  8. #8
    How about a Velcro square?
    Skip Hammerman

    2002 BMW Z8 - Meisterschaft GT, PP installed, CDV delete. 100,000 Mile Club
    2013 BMW X3
    2015 Porsche 911 Targa 4S

  9. #9
    Quote Originally Posted by Musta10000 View Post
    How about a Velcro square?
    Thanks,
    That Might work!
    Thanks,
    Worth a try to save $450.....

  10. #10
    Sport Button On lamakdaddy's Avatar
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    I have just comissioned the 3D printing of these clips. One of mine is broken and one is missing..I will post pictures and feedback of the end result...

  11. #11
    Awesome idea, thanks for sharing!
    Andrew Macpherson

    Expert Z8 Inspections, with full support for both Z8 sale and purchases.

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    How much MX 105 to apply

    I will try the super glue on my seat back repair. I saw a bottle of it is $10 for 4 grams on Amazon. Is this enough to glue down all the clips on a pair of seats or should I purchase a few bottles or try to find a larger container of the glue?

    Jay in Southeast Florida
    Z8 #436
    License Plate: MYBMW Z8
    Eisenmann Mufflers
    Dinan Performance Software

  13. #13
    Last night I was watching Wheeler Dealers on the Velocity channel. They were refurbishing an old 70's Mercury Capri, which had a non-functioning sunroof due to the failure of a plastic component. They took the damaged piece to a company called GoEngineer (www.GoEngineer.com), who was able to scan the damaged piece, correct the scan for the damage, and recreate the piece with a 3-D printer. The cost for the pieces (two were needed) was $125.00, although they did state that the price did not include the scan work, which I suspect would be the expensive part of the deal. The part was considerably larger and more intricate than the seatback clips. Just food for thought.

  14. #14
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    And as Boomster noted, the cost of the printed parts did not include the 3D scanning. And that is the problem. I spoke to two firms with 3D scanners and frankly they wanted a fee equal to the cost of the seat back to scan the parts to be printed.

    Jay in Southeast Florida
    Z8 #436
    License Plate: MYBMW Z8
    Eisenmann Mufflers
    Dinan Performance Software

  15. #15
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    Getting seat back clips

    BMW only sells the entire seat back and not the top clips. They sell the bottom clips but they are useless as they sell only one part of that two-part clip. So don't bother ordering it from BMW. It is not the complete assembly. The Z8 seat also has two side clips which are not shown in the Z8 parts manual. There is a BMW dealer in Germany (see other seat back threads) who can get you 3D printed replacements for the top clips. Check out the other threads on this topic for more details. BMW sells the entire seat back assembly but their price was twice that of what can be purchased from BMW parts dealers. The seat backs (unpainted) are a little less than $500 each.

    Jay in Southeast Florida
    Z8 #436
    License Plate: MYBMW Z8
    Eisenmann Mufflers
    Dinan Performance Software

  16. #16
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    All the glued parts have starting to fail in my car...surprising since most of the time it sits in a cool garage. What I've found is that BMW didn't do any surface prep on the parts. Glue applied to two parts without any abrading of the parts will eventually lead to the parts peeling away from each other. My door compartments have all started to separate, but with a little careful sanding of the mating surfaces and fresh glue I'm sure they'll easily last far longer then the original glue used at the factory.

  17. #17
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    My seat backs have started to pop off...the top clips are intact and I'm using Velcro to pretty successfully keep those clips attached to the seat backs. What I did find is that the side clips are breaking...Has anyone had the necessity (yet) to 3D print those parts? Thanks.

  18. #18
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    As the original owner of a red/red black Z8 I've resolved many of the small maintenance issues myself. Recently I repaired my seat backs using all the instructions I could glean from this website. Just the top clips had come unglued, and I chose epoxy to fix them since I've had a lot of experience with West Systems products. No problems to reattach the clips, but the seat backs just don't fit as tightly as they once did. I can see the indentations from where originally the seat backs pressed against the leather, but now the seat backs have maybe a 3/8" gap up top. I feel like all the clips engaged at the correct levels. What am I doing wrong? I've considered removing the seat backs again, measuring the thickness of the seat with a micrometer, and then building up the clips so they tighten as I slide them up into place. I know I could solve this, but don't know why I have to. Any one else have this problem?

  19. #19
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    Most likely the top clips engaged with the leather and not with the metal frame underneath. It does take a good bit of pressure to compress the upholstery layer enough so that the clips slide under the metal seat structure. Iíve always had the seats out of the car when fixing the seat backs. Donít know if I could get enough compression pressure on the upper seat back if it wasnít on the workbench.