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Stock Conti Valve Stem Failure Today - Anybody else have this?

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YOUR RESEARCHStock Conti Valve Stem Failure Today - Anybody else have this?

Leading reported evidence

Use compressor

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed · Original poster
I know it is the stem because I used a compressor to partially reinflate the tire, and when I move the stem toward the rear of the car, the air rushes out.
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Stock Conti Valve Stem Failure Today - Anybody else have this?

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Run collude

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
These combined with the generally high tire pressures we run all collude to eat tire stems.
Original post Read captured discussion
Stock Conti Valve Stem Failure Today - Anybody else have this?

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Leading evidence: 'Use compressor' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run collude' (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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Run collude

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
These combined with the generally high tire pressures we run all collude to eat tire stems.
Original post Read captured discussion
Stock Conti Valve Stem Failure Today - Anybody else have this?

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Run collude

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
These combined with the generally high tire pressures we run all collude to eat tire stems.
Original post Read captured discussion
Stock Conti Valve Stem Failure Today - Anybody else have this?

Use compressor

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 · Original poster
I know it is the stem because I used a compressor to partially reinflate the tire, and when I move the stem toward the rear of the car, the air rushes out.
Original post Read captured discussion
Stock Conti Valve Stem Failure Today - Anybody else have this?

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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.

3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

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Generation: 20261027T013556Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Today my passenger rear stock Conti valve stem failed somehow and the tire went flat. I know it is the stem because I used a compressor to partially reinflate the tire, and when I move the stem toward the rear of the car, the air rushes out. I have had many cars and tires in my life and this is the first time this has happened to me. I would especially not expect this to happen on a Porsche approved stock tire <img border="0" alt="[grrrrrrr]" title="" src="graemlins/cussing.gif" /> . Anybody else have this happen or have any idea as to the cause? I'm having it taken to the dealer tomorrow (should be interesting).

POST 2Original post

The stem is not part of the tire, it's part of the wheel.

POST 3Original post

This is pretty common on high performance cars. I used to cut down valve stems about once every six months on my M3, until I switched out to Motorsport metal valves. There are several issues at work here: heat, centrifugal stress and pressure. The heat from tire friction and brakes will weaken the rubber, while high speeds will cause the stem to stretch outward under centrifugal force. These combined with the generally high tire pressures we run all collude to eat tire stems. What to do? Next time you get new tires, look into getting some metal stems (the full-threaded kind). In the meantime, Porsche makes a tirecap that screws on like any other cap, but has a jacket that comes down to cover most of the stem. Best part is they're cheap and look pretty cool too! (PN 000 044 600 00) The jackets will keep the stems from bowing out under high loads. There's also some stem supports available, but I don't have the PN handy (I'll look for it). HTH -Paul

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