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Type 85 floppy side mirror fix??

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 Post subject: Type 85 floppy side mirror fix??
PostPosted: Mon Jan 06, 2020 1:25 am 
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Is there a known fix for the floppy side-view mirrors? My family has >5 cars with this problem, caused by the cast metal bracket within the housing bending under the stress of the springs. My dad has attempted to strengthen it by filling in the"I-beam" part of the bracket with epoxy after straightening but that didn't last. I'm not sure what the base metal is...not magnetic and melts easily under too much heat, could be aluminum.

Image

Apparently the Type 44 used steel brackets? At least, my dad showed me such a bracket and it couldn't be retrofitted to the Type 85.

I'm wondering if the magic of 3D scanning could yield a CAD file that leads to machining or 3D printing. I've got no experience on that so am doing some research. Any input is welcome.

Cheers, Eric


Last edited by ejfluhr on Thu Apr 30, 2020 9:47 pm, edited 1 time in total.

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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Tue Jan 07, 2020 7:48 am 
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Location: Near Sacramento. Sometimes at Derracuda's place(Oregon)
maybe after straightening it you could get some wood nails of proper diameter and cut them the fit perfectly inside the indention along the center and then epoxy them in on both sides as a way to strengthen it. Those wont bent easy. maybe even add a could tiny zip ties around it to make sure the nails cannot move around.

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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Thu Jan 09, 2020 10:52 am 
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The issue I found was that the stamped metal plate that the motor attaches to gets bent where it contacts the piece you've pictured. My solution was to bend that plate back and that fixed the preload so no more flop. Has held up for a year.

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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Thu Jan 09, 2020 10:58 am 
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Simply bend this back down and it'll tighten up.

ImageIMG_20191022_142341 by Vex Art Media, on Flickr

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1992 Porsche 968 (07K transplant in progress)
1983 Aud UrQ (MC1, GT2871R, IIc)
2003 Audi S8 (DD)
Past Audis: 87 CGT, 87 4kcsq, 93 S4, 90 CQ, 87 5ktq, 95.5 S6Avant, 86 CGT CE, 95 90qs 1.8T, 83 UrQ, 87 CGT 7A
Past P-cars: 80 931, 87 924S, 87 951


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Fri Jan 10, 2020 1:12 pm 
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Alex, what is broken in there below the piece you bent back?

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1985 4000S quattro AUX 40V 4.2 - Just about to get S8 40V and new face.
1984 UR quattro Lotsa Mods.
1987.5 Coupe GT Special Build
1991 200 20VT
1991 200 10vt fwd auto
1990 Jetta GLI 16v
1989 Jetta Coupe


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Fri Jan 10, 2020 9:04 pm 
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Just the tip of the cast piece (the short leg in the OPs picture). Doesn't really do much. Accidentally pryed against it trying to get the springs installed.

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_________________
-Alex- @vexartmedia on Instagram
1992 Porsche 968 (07K transplant in progress)
1983 Aud UrQ (MC1, GT2871R, IIc)
2003 Audi S8 (DD)
Past Audis: 87 CGT, 87 4kcsq, 93 S4, 90 CQ, 87 5ktq, 95.5 S6Avant, 86 CGT CE, 95 90qs 1.8T, 83 UrQ, 87 CGT 7A
Past P-cars: 80 931, 87 924S, 87 951


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Sun Jan 12, 2020 12:31 am 
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My father believes that tab was used to facilitate manufacturing installation and isn't otherwise necessary.

My bracket is really, really bent and I don't think bending the metal frame to compensate is going to help enough, or for long. I'm going to try and get my brackets 3D-scanned (I think it will cost $100-$200) and then I can see what it costs to make replacements.


Last edited by ejfluhr on Thu Apr 30, 2020 9:48 pm, edited 1 time in total.

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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Sun Jan 12, 2020 3:04 pm 
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Sure they weren't cast bent to clear the motor housing/etc? Mine were super floppy. It's free to try bending the plate vs spending hundreds of dollars and time... But to each their own.

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_________________
-Alex- @vexartmedia on Instagram
1992 Porsche 968 (07K transplant in progress)
1983 Aud UrQ (MC1, GT2871R, IIc)
2003 Audi S8 (DD)
Past Audis: 87 CGT, 87 4kcsq, 93 S4, 90 CQ, 87 5ktq, 95.5 S6Avant, 86 CGT CE, 95 90qs 1.8T, 83 UrQ, 87 CGT 7A
Past P-cars: 80 931, 87 924S, 87 951


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Thu Jan 16, 2020 11:40 pm 
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My father has ~9 brackets in various states of bentness. The picture I took is of the best one we have, which was slightly bent and he straightened it. Holding it up to my very bent one, you can easily see the difference. I'm a purist, would rather spend the time and/or money replacing the bad part then messing up another part. Plus my family has 8 type-85 cars (2 Urq, 3 4Kq, 3 CGT), so a quality fix goes a long way! (or at least amortizes the cost down)
Cheers, Eric


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Fri Jan 17, 2020 8:39 am 
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ejfluhr wrote:
My father has ~9 brackets in various states of bentness. The picture I took is of the best one we have, which was slightly bent and he straightened it. Holding it up to my very bent one, you can easily see the difference. I'm a purist, would rather spend the time and/or money replacing the bad part then messing up another part. Plus my family has 8 type-85 cars (2 Urq, 3 4Kq, 3 CGT), so a quality fix goes a long way! (or at least amortizes the cost down)
Cheers, Eric


Eric, how old are you?

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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Fri Jan 17, 2020 9:52 am 
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I've also got the floppy mirror problem on my cars. On my 84 urq, the rivet broke and the mirror is now hanging by the wires so I am interested on rebuilding/repairing my mirrors. My bracket is still intact in the mirror, but came disconnected from the door mount on the 1 inch popcicle stick cam thing. I've never taken a mirror apart. Can anyone post the steps to disassembly?

I've also got a few other B2 cars that can use a decent repair.


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Thu Apr 30, 2020 9:46 pm 
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Ok, so I had the bracket scanned and cleaned up to be stronger than stock & cheaper to manufacture (e.g. we cut off the extra tab, which we presume was used during production-line assembly of the mirror). I'm going to run off several sets for my cars, but may consider extras as a way to amortize the costs. I'm still getting quotes, but the price for a pair (right and left) looks to be less than $200. I'm not making money off these, just trying to cover costs and help the community. Given the current state of social distancing, there is no prescribed timeline for this project, but my Urq is not easily driven with the mirror wires hanging out the door so I am motivated to get this done soon.

Based on earlier postings, I'm presuming there is no interest in these, but wanted to poll the forum just in case.

Cheers, Eric

Picture of the scanned bracket, FYI:
Image


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Thu Jul 16, 2020 10:15 pm 
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Shazam! (just documenting the finale)

Here is the new bracket machined in aluminum alloy 7075-T6:
Image

Here is a comparison of the original versus my white-plastic 3D-printed copy used to verify the CAD file, along with driver and passenger side versions of the final product:
Image

The mirror pin isn't tight enough in the thru-holes for my liking so we need to source a replacement, which means final-final assembly is TBD. Also we made the material under the spring hooks a bit too fat so those have to be filed down a bit (mostly just rounding off the bottom). However, I am super pleased with the overall result and will never have to worry about floppy mirrors again!

My thanks to https://www.reverseaustin.com/ for the scanning & excellent CAD cleanup at an extremely fair price, and https://crownprecision.com/ for a small-batch job well done. (I am not affiliated with these businesses, just a happy customer.) We did come in under my $200/pair cost target (excepting personal labor/efforts, of course).

Cheers, Eric


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Fri Aug 14, 2020 10:50 am 
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I'd be interested in a pair of mirror brackets when you get them finalized if you're still taking an order count.


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 Post subject: Re: Type 85 floppy side mirror fix??
PostPosted: Thu Aug 27, 2020 9:27 pm 
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Final picture of bracket installed in my car:

Image

Works perfect! Ended up using an M3 bolt/nut combo for the mirror pin; didn't think it cleared the plastic housing at first but very careful inspection showed there was just enough clearance. Stronger than a roll pin, IMO, so I'm pleased with that.


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