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Acceptable camshaft deviation values (99 C4)

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YOUR RESEARCHAcceptable camshaft deviation values (99 C4)

Leading reported evidence

Replace cam chains and tensioner pads

Performed · outcome unconfirmed

No successful repair reported for this finding.

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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
I changed my cam chains and tensioner pads after I got a Fault code (1325/1341 iirc) and CEL.
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Acceptable camshaft deviation values (99 C4)

Frequently discussed work

Repair shop and showed ~6%

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
I was told 8% was limit by my repair shop and showed ~6% when i had it fixed...maybe i got lucky things didnt go south well before the repair!
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Acceptable camshaft deviation values (99 C4)

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Leading evidence: 'Replace cam chains and tensioner pads' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair shop and showed ~6%' (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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Repair shop and showed ~6%

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
I was told 8% was limit by my repair shop and showed ~6% when i had it fixed...maybe i got lucky things didnt go south well before the repair!
Original post Read captured discussion
Acceptable camshaft deviation values (99 C4)

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.

Repair shop and showed ~6%

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
I was told 8% was limit by my repair shop and showed ~6% when i had it fixed...maybe i got lucky things didnt go south well before the repair!
Original post Read captured discussion
Acceptable camshaft deviation values (99 C4)

Replace cam chains and tensioner pads

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
I changed my cam chains and tensioner pads after I got a Fault code (1325/1341 iirc) and CEL.
Original post Read captured discussion
Acceptable camshaft deviation values (99 C4)

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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.

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

Rennlist: 1 discussions

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1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link
After changing everything out I think the deviations are still over 2 degrees on both banks (sorry I don't remember the exact #'s) but all codes and CEL are gone...
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Generation: 20261027T031046Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Just connected my Durametric to my 99 C4 to take a look at my camshaft deviation values. My understanding is a value of 0 +/- 6 is within the acceptable range. Can anyone confirm this? My values are -3.23 and -4.30 @ 750 RPM Thanks for the help.

POST 2Original post

Yes, that’s correct.

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 15312232

Thank you.

POST 4Original post

***I�m not sure my previous post was published or not - I made a mistaken analysis anyway... Regarding the quoted numbers: How certain are the numbers produced by non-Porsche (nom-dealer) computers? I have often wondered. Thank you. Jerry

POST 5 / ORIGINAL POSTEROriginal post

Quotes source post: 15314145

The numbers reported by the Durametric software should be the same values read from the DME/cam sensor.

POST 6Original post

I was told 8% was limit by my repair shop and showed ~6% when i had it fixed...maybe i got lucky things didnt go south well before the repair!

POST 7Original post

Quotes source post: 15315231

+/- 6 degrees (not %) is the specified limit on deviation. 0 degrees being "perfect", albeit rare even on a recently "rebuilt/refreshed" motor. -3.23, & -4.3 are well within spec. Find another shop...

POST 8Original post

Quotes source post: 15315533

We consider anything over a 4 needing replacement of the variocam wear pads on a 5 chain engine. Tony Callas (PCA Technical Committee) also has the same recommendation.

POST 9 / ORIGINAL POSTEROriginal post

Quotes source post: 15316875

Well I guess it may be time to start thinking about pulling the motor out.

POST 10Original post

Quotes source post: 15316875

I certainly wouldn't argue your recommendation. My recommendation to find another shop was based on the fact that they said +/- 8 was the limit... I changed my cam chains and tensioner pads after I got a Fault code (1325/1341 iirc) and CEL. I think the deviations were over 8 on both sides. After changing everything out I think the deviations are still over 2 degrees on both banks (sorry I don't remember the exact #'s) but all codes and CEL are gone...

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