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bump stops turned to powder #722446
24/10/21 12:09 AM
24/10/21 12:09 AM
Joined: Dec 2020
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craig from mich Offline OP
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And....in the category of "issues with old car, low miles" (2012) the bump stops --rubber part at top of shock--on my original front shocks turned to powder. Shocks are fine and no reason to switch them (as far as I can tell). Any way to tell if these coil-over shocks are supplex or spax at a glance? And do you know if bump stop dampers are general and work on all shocks? Or do I have to hunt down manufacture? suggestions?

Last edited by craig from mich; 24/10/21 01:34 AM.

2011 BMW 328xi Black/Black (Klaus)
2012 M3W RAF Green/Tan (Klanky)
Re: bump stops turned to powder [Re: craig from mich] #722460
24/10/21 07:28 AM
24/10/21 07:28 AM
Joined: Feb 2016
Posts: 4,268
East Harling, Norfolk UK
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Part of the Furniture
RichardV6  Online NoMood
Part of the Furniture

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East Harling, Norfolk UK
Low miles maybe but nearly ten years old! Probably a little premature but same findings would be telling me to replace shocks, with an upgrade maybe to superior adjustable ones.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1960 Velocette Venom
Re: bump stops turned to powder [Re: craig from mich] #722463
24/10/21 07:53 AM
24/10/21 07:53 AM
Joined: Jun 2012
Posts: 1,805
United Kingdom, Lincolnshire
planenut Offline
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United Kingdom, Lincolnshire

A photo of the two types, Spax on the left and two Suplex. The Suplex should have "M3W S160001" on the bottom and "Suplex" on the springs. The bump stop failure is a problem with the Suplex certainly, the ones in the photo have the same problem.

[Linked Image]

Re: bump stops turned to powder [Re: craig from mich] #722499
24/10/21 12:34 PM
24/10/21 12:34 PM
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Okay, my bump stops are yellow. So they must be Supplex. I will look for markings. This helps! Now...if I want to kick this pricey mod down the street, is it work replacing just the stops?


2011 BMW 328xi Black/Black (Klaus)
2012 M3W RAF Green/Tan (Klanky)
Re: bump stops turned to powder [Re: craig from mich] #722535
24/10/21 06:59 PM
24/10/21 06:59 PM
Joined: Jun 2012
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United Kingdom, Lincolnshire
planenut Offline
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I would certainly check the markings more than just the colour of the bump stops to positively identify what you have. I have no information about replacing the bump stops, other than the contact details for Suplex in the "Parts Sources" section of the Alternative Parts List, available at the top of this forum in the Owners Resource Section. Not sure how up to date that is but I will be interested in your findings about some new ones. My Suplex shocks are sat on the shelf, not the car, so not as urgent. They are worth sorting out if they are Suplex as they are much better than the later standard Spax.

Re: bump stops turned to powder [Re: craig from mich] #722553
25/10/21 08:14 AM
25/10/21 08:14 AM
Joined: Mar 2011
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Nr Watership Down UK
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Nr Watership Down UK
Dan and Peter at Suspension Supplies Ltd (www.suspensionsupplies.co.uk) are the people to talk to - they did the dev work on the original suspension using Suplex units - it also turns out that some of the work also involved Black Arts Designs (www.blackartdesigns.com)....why do we know this - we had a broken rod in one of our units - in theory it should have been rebuildable but it turned out that the units on our car were part of a batch of non-rebuildable prototypes made by BAD - luckily BAD had a one-off spare lying in their attic....SSL put us in touch with BAD to make it all happen...great service by all involved.....Incidently our bump stops still seem OK so sunlight or higher ambient temp may be a problem

Re: bump stops turned to powder [Re: planenut] #722627
26/10/21 02:23 AM
26/10/21 02:23 AM
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craig from mich Offline OP
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Correction, Ian, mine are SPAX which is marked clearly. I will try to improvise a bump stop or shop for a shock repair kit to keep these going until they start leaking.


2011 BMW 328xi Black/Black (Klaus)
2012 M3W RAF Green/Tan (Klanky)
Re: bump stops turned to powder [Re: craig from mich] #722656
26/10/21 11:45 AM
26/10/21 11:45 AM
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craig from mich Offline OP
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Ian, that Suspension Supplies looks the business. I will ask them for advice when I swap out the shocks


2011 BMW 328xi Black/Black (Klaus)
2012 M3W RAF Green/Tan (Klanky)
Re: bump stops turned to powder [Re: craig from mich] #722679
26/10/21 04:07 PM
26/10/21 04:07 PM
Joined: Jun 2012
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United Kingdom, Lincolnshire
planenut Offline
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I don't think Suspension Supplies do a M3W shock absorber kit now, they did once through MMC but there were some issues with it. The original spec Suplex shocks are no longer available. Your main choices are Spax adjustable, ATR and Ohlin in increasing price and possibly performance. There are one or two other providers but these are the main recognised suppliers for M3W's at the moment.

Re: bump stops turned to powder [Re: planenut] #722745
27/10/21 07:57 AM
27/10/21 07:57 AM
Joined: Mar 2011
Posts: 203
Nr Watership Down UK
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JMD Offline
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J

Joined: Mar 2011
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Nr Watership Down UK
Originally Posted by planenut

I don't think Suspension Supplies do a M3W shock absorber kit now, they did once through MMC but there were some issues with it. The original spec Suplex shocks are no longer available. Your main choices are Spax adjustable, ATR and Ohlin in increasing price and possibly performance. There are one or two other providers but these are the main recognised suppliers for M3W's at the moment.


Indeed, SSL have nothing to offer just now for the M3W - ours has the original Suplex units from 2011/12 hence response when it seemed Craig had similarly old units. In talking to SSL back in July, it appears they may be working on something for the M3W....we shall see...


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