dan8400
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| posted on 20/8/15 at 04:28 PM |
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Reducing bolt hole size. Possible?
Hi everyone
I am looking at changing my rear shock absorbers. The ones I have now are from a Peugeot 205 and I'm looking to replace with classic mini items
(the car should have had these from the start (tiger supercat)).
Problem is, the 205 shocks have a 16mm bolt through them (so holes enlarged on chassis) and the mini times are 10mm (I think?)
Is there a way I can reduce the bolt hole size in the chassis? Is there some kind of washer I can use as like a sleeve?
Sorry I don't know the technical terms (if such a thing exists)
Thanks
Dan
Hey - That's Journey!!!
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OliilO
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| posted on 20/8/15 at 04:39 PM |
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A top hat spacer/washer might do it.
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dan8400
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| posted on 20/8/15 at 04:41 PM |
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Ok. Thank you for the reply. Do you have a link?
Thanks
Dan
Hey - That's Journey!!!
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OliilO
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| posted on 20/8/15 at 04:43 PM |
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https://www.google.co.uk/#q=top+hat+spacers
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joneh
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| posted on 20/8/15 at 04:46 PM |
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On suspension I'd get the brackets remade.
I reckon a plastic top hat would wear out fairly quickly unless you can get them in steel.
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dan8400
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| posted on 20/8/15 at 04:48 PM |
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Thanks Joneh. I was looking for steel ones. If the only choice is plastic I'll do as you suggest and get new brackets welded on
Thanks
Dan
Hey - That's Journey!!!
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dan8400
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| posted on 20/8/15 at 05:13 PM |
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Can I get someone to weld in some thick penny washers at the right size? Or is this dodgy?
Hey - That's Journey!!!
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40inches
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| posted on 20/8/15 at 05:27 PM |
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Something like this?
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dan8400
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| posted on 20/8/15 at 05:30 PM |
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That's the kind of thing. I need it 16mm down to 10mm. Had a Google. Couldn't find anything yet. Might just get the brackets re done.
Thanks for the replies anyway guys
Thanks
Dan
Hey - That's Journey!!!
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rusty nuts
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| posted on 20/8/15 at 05:36 PM |
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The holes for the Mini shock absorbers are likely to be 3/8" not 10mm
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dan8400
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| posted on 20/8/15 at 05:38 PM |
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Thanks rusty
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joneh
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| posted on 20/8/15 at 05:41 PM |
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Those look nice. As he ^ says classic mini shock bolt size is 3/8.
[Edited on 20/8/15 by joneh]
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cliftyhanger
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| posted on 20/8/15 at 06:55 PM |
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You may be able to get polybush with correct outer and inner sizes? As in replace the bushes totally.
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joneh
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| posted on 20/8/15 at 07:29 PM |
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quote:
Originally posted by cliftyhanger
You may be able to get polybush with correct outer and inner sizes? As in replace the bushes totally.
It's the chassis that's too big, this would need the shock reamed but I doubt there would be enough material.
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Theshed
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| posted on 20/8/15 at 08:05 PM |
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This is a simple lathe job to make up some top hat spacers. I might be able to do these for you but am usually trampled by loads of folk on here with
a lathe
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dan8400
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| posted on 20/8/15 at 08:32 PM |
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Wow that's a generous offer thank you. I promise I won't trample on you! What sort of cost do you think?
I will need 8 in total. Outer size 16mm inner size 3/8. I will double check though.
Thanks
Dan
Hey - That's Journey!!!
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Theshed
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| posted on 21/8/15 at 05:59 AM |
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Ok I can make you some top hat bushes to suit the holes. A sketch would help. How thick and how wide a "brim". I think I have a 3/8
reamer. Are you sure 16mm is not actually 5/8"?
What material would you like? Mild steel should be fine but I do have much more exotic stuff.
Cost - pass on a favour
Time scale - I could do this on the weekend
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cliftyhanger
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| posted on 21/8/15 at 06:12 AM |
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quote:
Originally posted by joneh
quote:
Originally posted by cliftyhanger
You may be able to get polybush with correct outer and inner sizes? As in replace the bushes totally.
It's the chassis that's too big, this would need the shock reamed but I doubt there would be enough material.
I know the mini shocks have been used on other cars by changing the bushes. I very much doubt the "eye" or bush holder on the mini shock
is anything like as small as 16mm. Or are you getting them with spherical bushes? in which case speak to the manufacturer.
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jeffw
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| posted on 21/8/15 at 06:45 AM |
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Did Tiger really use Mini shocks on this kit?
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dan8400
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| posted on 21/8/15 at 06:52 AM |
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Hi clifty,
Don't take this he wrong way but have you read my OP? Kind of explains it.
Theshed,
Thank you so much. I will measure and sketch as soon as I get home. Please let me pay you something. I don't wan t you to be out of pocket.
Jeffw,
Yes they did. You could upgrade to Spax items but I didn't. I was on a budget then and I am now. Wish I had more cash but that's how it is
I'm afraid
Thanks everyone
Dan
Hey - That's Journey!!!
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Slimy38
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| posted on 21/8/15 at 07:38 AM |
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I would go for getting the holes filled in with welded discs of the same thickness, then redrill to the correct size.
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Charlie_Zetec
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| posted on 21/8/15 at 09:24 AM |
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quote:
Originally posted by Slimy38
I would go for getting the holes filled in with welded discs of the same thickness, then redrill to the correct size.
May be the cynic in me, but not sure I'd want my suspension relying on such a small welded area on repeat strain perpendicular to it. If it
were me, I would speak to local machine shop (or someone with a lathe) and get some top hat washers made up for BOTH sides of the current mount, thus
spreading the load better.
Land Rover Defenders use a similar design for the top of their shock absorbers and upper & lower on the front, but I don't think the hole
size is reduced by 6mm; more like 2. But at least you know it has/can be done!
Artificial intelligence is no match for natural stupidity!
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britishtrident
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| posted on 21/8/15 at 10:23 AM |
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Once tightened up the location is provided by friction between the ends of the inner tube of the bush and the bracket.
To do this the end tube has to have a decent annular bearing area on the bracket.
Only real solutions to this are (1) New brackets or (2) Special bushes.
A skilled gas welder could probably do something but doing it on the car really isn't on.
Keep in mid also the Mini dampers were designed for cars with rubber suspension, a lot of the damping came from the natural hysteresis of the rubber
cone.
ISTR the bolts on Mini dampers were most likely to be 7/16" dia approx 11mm
[Edited on 21/8/15 by britishtrident]
[Edited on 21/8/15 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Theshed
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| posted on 21/8/15 at 01:11 PM |
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Lets have a picture then and the collective can design the best bushes and I will turn them up. There really should not be much sideways load on a
shock mounting.
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dan8400
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| posted on 21/8/15 at 01:15 PM |
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I may just stick with the 205 units. Not worth an arguement
Hey - That's Journey!!!
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