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Guest Message by DevFuse
 

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* * * * * 2 votes

Making a Polyurethene Bush or Bushing

Suspension damper shock-absorber bush bushing polyurethene plaster mould mold EA82

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14 replies to this topic

#1 NickNakorn

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Posted 24 February 2013 - 01:51 PM

Well, it seems to have worked! For how it was done go to:

 

http://www.nagara.co...akingBushes.htm

 

 

They're not perfect but they're good enough for a top spring-damper mount.



#2 Subruise

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Posted 24 February 2013 - 02:17 PM

good write up



#3 mikaleda

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Posted 24 February 2013 - 02:21 PM

Nice write up, lots of pics and well written. :cool:

#4 86BRATMAN

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Posted 24 February 2013 - 03:05 PM

Color me impressed, great write up!!



#5 bendecker

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Posted 24 February 2013 - 03:08 PM

Really nice! I did some casting a while back for my mirror gaskets and new 4wd stick shift knobs. If interested, you can see my pic here:

 

https://plus.google....708382421326497



#6 86BRATMAN

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Posted 24 February 2013 - 03:10 PM

Really nice! I did some casting a while back for my mirror gaskets and new 4wd stick shift knobs. If interested, you can see my pic here:

 

https://plus.google....708382421326497

 

 

Is this the same Brat I got you a mirror for years ago?



#7 NickNakorn

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Posted 24 February 2013 - 03:23 PM

Hi all, many thanks for your positive comments. Bendecker, did you use a vinyl mould or is that a plaster mould with blue relase agent on it for those mirrot backs?



#8 bendecker

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Posted 24 February 2013 - 04:17 PM

Is this the same Brat I got you a mirror for years ago?

 

The one that broke off by a badly tossed hay bale? Yep!



#9 bendecker

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Posted 24 February 2013 - 04:19 PM

Hi all, many thanks for your positive comments. Bendecker, did you use a vinyl mould or is that a plaster mould with blue relase agent on it for those mirrot backs?

 

I used silicone. It releases really easily, but is expensive and tends to warp over time if you don't keep an original in it. You can crank out a lot of parts quickly with it, though, and it's really easy to work with. The detail is so perfect you can see lettering and even really minor scratches that were in the original.

 

BTW, I got motivated and just added some more pics of parts I've made, including the plastic parts that go between the back headrests and the vertical pieces they slide on.


Edited by bendecker, 24 February 2013 - 10:30 PM.


#10 NickNakorn

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Posted 24 February 2013 - 04:41 PM

first class work - excellent; my parts look very crude by comparison (but cheap!).



#11 86BRATMAN

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Posted 24 February 2013 - 05:53 PM

The one that broke off by a badly tossed hay bale? Yep!

I'm glad to see you're still keeping the old guy in good shape!!!



#12 bendecker

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Posted 24 February 2013 - 10:32 PM

Bushings don't have to be pretty, they just have to work. And cheap is a bonus! I'm definitely going to follow your lead when they need to be replaced on my Brat.


Edited by bendecker, 24 February 2013 - 10:32 PM.


#13 NickNakorn

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Posted 25 February 2013 - 06:33 AM

You're right, cheap is always good. Here's enough for either 2 sets of rear spring-damper units (1991 EA82 Wagon) or (I don't know if they're the same) perhaps two front and two rear? 

 

 

And the mould is still ok - so more will be very cheap!



#14 NickNakorn

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Posted 26 February 2013 - 10:51 PM

(Below) Here is set fitted to the spring-damper unit,

 

 

(Below)...used in conjunction with a bought Powerflex 60mm coaxial bumpstop. As I've also replaced the suspension arm bump-stop, the rear suspension will hopefully feel a lot more planted than before. Previously the car tended to 'float and bounce' too much on undulating fast roads. As for the longevity of the bushes, time will tell.

 



#15 NickNakorn

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Posted 29 June 2013 - 12:43 PM

To make the ride even smoother, to get rid of a slight front-end clunk and to help, possibly, remove the wheel shimmy and brake judder (it's a long story!) and to firm up the anti-roll bar (sway bar), I have replaced the anti-roll bar link bushes. The pics are self explanatory. You'll see one cardboard mold is a bit crap - I couldn't find my scissors or a knife for love nor money (just moved loads of things and tidied up so I could paint the workshop floor) so it has a torn edge.

 

anti-rollbarbushes001_zpsf42d0440.jpg

 

anti-rollbarbushes002_zpsa4a4efc1.jpg

 

Bushes very worn; one worse than another.

 

anti-rollbarbushes003_zps9ae1d8f6.jpg

 

I measured the inside diameter of the anti-roll bar end and found a socket with outside diameter same size

 

anti-rollbarbushes005_zpse4fa3025.jpg

 

 

 

then a socket of outside mold diameter

 

anti-rollbarbushes006_zps03e91076.jpg

 

anti-rollbarbushes007_zpsc19fc787.jpg

 

Inner sleeve/crush tube sits in the middle of each and polyurethene is mixed and poured

 

anti-rollbarbushes009_zps8242825e.jpg

 

anti-rollbarbushesandtidy-up010_zps4f637

 

A reasonable result for rough and ready job. Exact dimensions were not critical and the bushes fitted with very firm pressur from both thumbs plus help from a dab of dishwashing liquid. Off on a 100 miles plus trip to JapFest2 to have the car displayed with some Brats on a classic Brat stand display (there's no L-series/leone/loyale club because there's less than a dozen left on UK roads in total) - so if the polyurethene stands up to that trip I expect it will be ok. (The rear shock bushes are still fine by the way). Toodle-pip chaps!


Edited by NickNakorn, 29 June 2013 - 12:46 PM.






Also tagged with one or more of these keywords: Suspension, damper, shock-absorber, bush, bushing, polyurethene, plaster, mould, mold, EA82

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