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do we have clutch delay valve?

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12 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHdo we have clutch delay valve?

Leading reported evidence

Use damped tone-arm

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It "delays" the engagement of the clutch, much like old record players used a damped tone-arm to gently lower the needle onto the surface of a record.

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do we have clutch delay valve?
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Test drove the

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Suggestion

, I test drove the

Original post Read captured discussion
do we have clutch delay valve?
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Leading evidence: 'Use damped tone-arm' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test drove the' (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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Test drove the

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Suggestion

, I test drove the

Original post Read captured discussion
do we have clutch delay valve?
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Test drove the

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Suggestion

, I test drove the

Original post Read captured discussion
do we have clutch delay valve?

Use damped tone-arm

No successful repair reported for this finding.

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Reported fixes
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed

It "delays" the engagement of the clutch, much like old record players used a damped tone-arm to gently lower the needle onto the surface of a record.

Original post Read captured discussion
do we have clutch delay valve?
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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.

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

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POST 1Original post

Theory of Operation - What is a CDV? The Clutch Delay Valve (CDV) is a one-way restrictor installed by the factory between the clutch slave cylinder and clutch master cylinder , as shown in Figure 1. It "delays" the engagement of the clutch, much like old record players used a damped tone-arm to gently lower the needle onto the surface of a record. Because of this valve, no matter how quickly you lift your foot off the clutch pedal, the clutch engages the flywheel at a constant (slow) rate. In theory, it can save the driveline from shock, were an inexperienced (or immature) driver to dump the clutch at high RPM. But in practice, all it does is prematurely wear out the clutch and turn experienced drivers into people who, despite 20 years of practice, cannot shift gears smoothly. During parallel parking maneuvers, the delay can be infuriating, causing constant clutch slippage. And during hard acceleration, the large amount of clutch slippage can greatly shorten the life of your clutch. During normal, sedate driving, the shift from first into second gear is often jerky, leading passengers to question your skill. As the driver, you can see your passengers' heads bobbing back and forth during every shift! Yes, in their minds, they are laughing at you. CDV

POST 3Original post

None that I am aware of, never seen one on my car.... looks to be a BMW thing...

POST 4Original post

There is no mention of it in the following parts catalog PelicanParts.com - 911-10 - 987_USA_KATALOG Also, there is no mention of it in Porsche's Product Information Guide for the Cayman (available under "Downloads"). My Cayman certainly does not behave the way you described, so, with the above info, I don't think there is a CDV on the Cayman S.

POST 5Original post

No it does not do that because you can feather it out or jerk it.

POST 6Original post

Quotes source post: 175941

No. You can dump the clutch.

POST 7Original post

Not just a BMW thing, it's also on the AP2 ('04+) S2000 's, supposedly to reduce the likelihood of blown differentials in drag racing, burnouts, clutch drops, etc.

POST 8Original post

I certainly don't feel one. All my past and current M3 's have had one (I have removed the one on my current car). When I was looking for what became my Cayman , I test drove the BMW M coupe. The CDV on that car completely ruined the driving experience for me.

POST 10Original post

There's one on our E46 M3 and it is really a pain. Glad to hear the cayman doesn't have one

POST 11Original post

Hmm, we do have a clutch delay switch: http://www.planet-9.com/cayman-complaints/25405-clutch-delay-switch-defeated-joy.html I know they are not entirely same but shouldn't you guys have felt it?

POST 12Original post

Search for posts on stalling the car. We feel it and adapt to it.

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