26 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHShock Mount Bump Stop replacement
Leading reported evidence
Replace bump stops all the way around
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Just replaced the worn bump stops on a C4 and per Porsche Technical Repair Manual, the end with the largest diameter on the bump stop should be oriented downwards.
Leading evidence: 'Replace bump stops all the way around' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair manual, the end' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Just replaced the worn bump stops on a C4 and per Porsche Technical Repair Manual, the end with the largest diameter on the bump stop should be oriented downwards.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Just replaced the worn bump stops on a C4 and per Porsche Technical Repair Manual, the end with the largest diameter on the bump stop should be oriented downwards.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I'm now thinking to use glue and retaining rings as they do, to insure the bump stop will last longer.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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Suggestion · Original poster
I worked with foam and will use a professional glue.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Repair manual, the end
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Just replaced the worn bump stops on a C4 and per Porsche Technical Repair Manual, the end with the largest diameter on the bump stop should be oriented downwards.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Just replaced the worn bump stops on a C4 and per Porsche Technical Repair Manual, the end with the largest diameter on the bump stop should be oriented downwards.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
26 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I just replaced bump stops all the way around. The only real special tool is the spring compressor. You can probably rent one from an auto parts store. The job isn�t too hard, just takes a bit of work.
if your bump stops are bad (mine were disintegrating), then I would bet that your shock mounts could also use replacing. You could also have some other things that need replacing (coffin arms, trailing control arms, sway bar drop links, etc).
So if you are going to have to do one bit of work, probably ought to consider doing other while you are there. I would be surprised if a halved bump stop would perform the same over time....
If you could assure the glue joint is stronger than the rubber, it might work. The glue would also need to be flexible enough to not break when bumped. That's a tall order. Unless there are a bunch of folks with trial and error work, you are in development territory. I would not try it.
How many people have actually hit hard enough to bump? I've never bumped on my stock suspension. Maybe I'm not driving on the right roads.
^^^ I think you mean MacGiver???? In any case, I agree... Not a chance of success splitting and gluing the bump-stops back together. What I don't understand is why there are no bump-stops made of a better material... The stock material basically just disintegrates over time (granted it's a difficult job)...
MacGyver stuff tends to work, MacGruber not so much - love it!
These are performance oriented cars and I wouldn't feel comfortable half-assing anything like that. Do it correctly the first time or you'll be doing it twice and probably at a higher cost.
I would like to thank you all for your answers.
My bump stops are already shot but
I already replaced coffin arms, trailing control arms, sway bar drop links, a couple years ago.
I worked with foam and will use a professional glue. The bumps stops are cheap so I decided to give a shot to this idea. I have nothing to loose except 30 minutes and $14.00 (eBay free shipping).
The worse that can happen is that I will have to do a full suspension job. In fact, the question is how long my glued bump stops will last.
I will keep you guys posted even if they last less than a week...
Also find this one showing me that some German engineers had the same idea;
https://joerg-tuning.com/fahrwerkste...enstangen.html
I'm now thinking to use glue and retaining rings as they do, to insure the bump stop will last longer.
These are listed as Spring Travel Limiters to save the tire from interference damage. Is that the same as a bump stop? I thought the bump stop was to ease the contact of the shock to the top mount when bottoming out. Maybe the point is moot as these would do the same thing only more so because you are expecting them to hit sooner than a full range motion. The design of these, being a wider diameter will have less force per area when hit and likely compress less resulting in less radial force that will try to push the rubber off the shaft. Sorry, stupid detail thinking that is likely meaningless.
Good luck with the experiment!
Wow, just checked mine on my newly purchased 2000 996 and they are crumbling like feta cheese. Let us know what glue works for you. Maybe a color matched zip tie will hold it in place until I get around to them. Susp work wasn't high on my todo list.
It's like 30 minutes to get a pair of shocks out why bother? There will be no glue that is both flexible enough but also strong enough to keep the bumps' spring rate intact.
^^^This is true (especially considering the material that the stock bump-stops are made of) but... Those blue or yellow German ones look pretty cool... I wonder why nothing like that is available here? Anyone here speak enough German to order a set (They're certain inexpensive enough - I just can't understand the German Amazon site...)?
If you click the German flag in the upper right you can change it to english, but you will find that it is not an item they will ship to the USA. I am finding this more and more to be the case with German Amazon.
Apologies for resurrecting an old thread, a bit late to the party, however this might be helpful to others who wound up here from a google search:
1. The bump stops are made out of PU foam, and this product seems to fit the bill
You Tube
2. Just replaced the worn bump stops on a C4 and per Porsche Technical Repair Manual, the end with the largest diameter on the bump stop should be oriented downwards. I think for lowered cars, it's better to put it the other way, as the bellows will fit better with most of the bump stop inside them. Note, the stop and the bellows attach/snap together at the largest diameter ring.
This is a source reference. Confirm exact model applicability in the original material.
