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YOUR RESEARCHAt VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Use (and abused) clutches, and they do tend
Performed · outcome unconfirmed
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Performed · outcome unconfirmed
We see a fair number of used (and abused) clutches, and they do tend to show a shiny wear pattern towards the outside edge of the disc, so that is nothing unusual.
At VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Use (and abused) clutches, and they do tend' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean no burns' (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.
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Suggestion · Original poster
The surface was clean no burns but smooth it did not have any hashing like a new disc usually shows.
At VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace clutch disc while re
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Suggestion
Did you replace clutch disc while re-using the old, worn pressure plate or flywheel, or did you replace those components as well?
At VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace spec clutch disc
Suggestion or failed attempt
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Suggestion · Original poster
I recently replace the spec clutch disc which showed even wear both sides but was some what glazed.
At VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace those components as well
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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
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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
Did you replace clutch disc while re-using the old, worn pressure plate or flywheel, or did you replace those components as well?
At VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use (and abused) clutches, and they do tend
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
We see a fair number of used (and abused) clutches, and they do tend to show a shiny wear pattern towards the outside edge of the disc, so that is nothing unusual.
At VIR Saturday Clutch seperated - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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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.
13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I was at my first track weekend this year at VIR three day with PCA Zone 2
. Why would my clutch disc separate with no real sign of a failure before it happened. It was a Porsche clutch the paint marking still on the pressure plate side. The Flywheel side delaminated. Three chunks of fiber disc, was all that came out.
I recently replace the spec clutch disc which showed even wear both sides but was some what glazed. I smelled at the last auto cross I was at in November. I talked to several people I tracked with and it was suggested I try a 987 clutch plate because the were beefed up a little to handle the increased HP in the newer models.
You can see the numbers in second photo. The presure plate may be ruined as well the fingers are packed with fiber. I guess I'm going back to a full Spec 2 setup
I noticed that only the outer edge of your friction material looks like it had made contact with the flywheel / pressure plate.
This raises questions:
1. Do you think you got the surfaces seated/broken in adequately?
2. Did you replace clutch disc while re-using the old, worn pressure plate or flywheel, or did you replace those components as well? (If you reused them, what condition were they in?)
3. Do the pressure plate and flywheel friction surfaces completely cover the friction material, or is there some friction material that overhangs the mating surfaces?
Comparing to a "stock 986" clutch disc (for new Sachs 5-speed unit, see attached for comparison) the 987 one you show has some differences. Maybe mismatching the 987 clutch disc with the 986 flywheel and pressure plate caused this problem.
In case it helps, the outside diameter of this pictured 986 5-speed clutch disc is 9-7/16".
Not an expert, but just like a brake rotor, the outside of a spinning disc will have higher surface speed, more heat, more wear, and higher centrifugal forces.
You are spot on. We see a fair number of used (and abused) clutches, and they do tend to show a shiny wear pattern towards the outside edge of the disc, so that is nothing unusual.
The disk is the same surface size as the Spec disc. There is about 3mm of clearance to the inside on the flywheel and about 2mm inside and outside on the pressure plate so the metal surfaces are larger than the disc is. I ran a straight edge around the pressure plate with a steel scale and could not see light through the edges. The finger were all at the same height when measured with a digital vernier. The surface was clean no burns but smooth it did not have any hashing like a new disc usually shows. I lightly sanded the surface to add some texture. The fly wheel was new. the old one had too much play.
I had something similar happen years ago. We suspected the disc had been dropped during shipping, which resulted in a small dent to the edge of the friction surface. We noticed it prior to installation but ignored it. The disc lost part of one side shortly after installation
I saw this once. A friend going downhill in 1st gear just stepped on clutch and proceeded to coast very fast downhill. Clutch disk was probably spinning 30k rpm when it exploded.
