11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHRear suspension noise.
Leading reported evidence
Check with the dealer the bushes supplied were correct
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
Purchased OEM's from Porsche but bushes supplied were oversize, the bar is original, checked with the dealer the bushes supplied were correct for the vehicle, they did say there are sometimes anomalies on the system.
Leading evidence: 'Check with the dealer the bushes supplied were correct' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'when you solve problem' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check wear and might indentify issue' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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 performed work without a confirmed outcome
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.
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 performed work without a confirmed outcome
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.
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 suspect a cause
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.
Suspected cause
Thanks would appreciate knowing what the issue was when you solve problem.
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
They can check for wear and might indentify issue.
Check with the dealer the bushes supplied were correct
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
Purchased OEM's from Porsche but bushes supplied were oversize, the bar is original, checked with the dealer the bushes supplied were correct for the vehicle, they did say there are sometimes anomalies on the system.
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
I would also like help with updates to standard rear suspension, after 100,000 miles, is it more beneficial to change the coffin/fork arms before the dampers?
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.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
spray the top mount with a rubber friendly lubricant from underneath, worked for me.
Hi all. Noticed recently on a run out that when going over bumps/potholes a real thump from the drivers side rear. It's not the usual clonking or knocking. I can't see anything wrong and all fixing and bolts are tight. Wondered if maybe it could be the dampers worn although they are clean with no signs of leakage. Any thoughts? Car is a 996 c4s with 56k miles
Have recently started to try to ease the thumps from the rear suspension so started with the anti-roll bar bushes.
Purchased OEM's from Porsche but bushes supplied were oversize, the bar is original, checked with the dealer the bushes supplied were correct for the vehicle, they did say there are sometimes anomalies on the system.
Porsche supplied the .26 but should have been .25
For info the part numbers are as follows:
996.333.792.24 = 18.70mm Dia
996.333.792.25 = 19.80mm
996.333.792.26 = 20.90mm
The incorrect sized bush would have fitted in the housing and on the bar so always check the bar diameter and bush part number (moulded into the rubber).
I would also like help with updates to standard rear suspension, after 100,000 miles, is it more beneficial to change the coffin/fork arms before the dampers? I was told the springs are probably least likely to affect the ride quality? but would have thought the biggest difference would be a damper change, any thoughts?
I am in the process of replacing my suspension under 'running reports'. My C4 has done over 100k with the M030 option. With my mileage I've decided to get the suspension back to factory spec and replace all arms, whilst using coilovers. It is costly as top mounts, bolts etc all add up.
sim500 - It might be worth getting the car on a ramp such as an mot centre. They can check for wear and might indentify issue. The rear setup is complex with numerous bushes. At 56k my suspicion would be the shock absorber, then possibly the rear 'coffin' arm and fork. The fork may give a knock at extreme but fine for good surfaces.
martintrga - I thought about doing a staged upgrade as you suggest. I waited 2 years before taking the plunge, but current situation gave me the option to take the car off the road and get the suspension sorted once and for all. Changing the dampers is easier and will be less efficient at 100K. The rear coffin arms have been a complete nightmare on my rears. It is not uncommon for them to be cut out at the bolts.
Coffin and fork arms changed last year. I know this is a sport's car and meant to be a firm ride but I've have the car 5 years now and never noticed this thumping noise. It's very noticeable and definitely shouldn't be there. Am happy to change the dampers myself if that is the problem but wondered if anyone else has had something similar. Tyre pressures at 44psi on rears but I can't see how that could be causing it as I've always inflated to that amount. Def don't want this to get expensive.
Another possibility is the anti-roll bar drop link. If you detach the lower joint from the ARB you can give it a tug to see if there is any play in the joints.
Sounds like the shocker and ARB bushes are all that isn't new then! Possibly just be the shocker top mount? These noises are notoriously difficult to track down.
Thanks would appreciate knowing what the issue was when you solve problem.
How much improvement did you notice in the ride after fitting new rear coffin/fork arms and drop links.
Hi. It was actually just about ridding the car of annoying clonking noises when going over bumps which is a common issue it seems. As you know there are many arms and bushes but it seems it's the coffin/fork arms and drop links that are the culprits. So yes it felt and rode better but i had the geometry redone as well. Well worth doing and if you're handy with the spanners can save a few quid too.
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