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Exhaust valves, two versions?

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHExhaust valves, two versions?

Leading reported evidence

Inspect heads

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No successful repair reported for this finding.

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Suggestion · Original poster

I�m currently in the process of inspecting the heads on my old engine that suffered a jumped timing chain, and the damage it made on the valves on one cylinder.

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Exhaust valves, two versions?
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Leading evidence: 'Inspect heads' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Inspect heads' (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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1 matching discussions · 3 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Inspect heads

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 · Original poster

I�m currently in the process of inspecting the heads on my old engine that suffered a jumped timing chain, and the damage it made on the valves on one cylinder.

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Exhaust valves, two versions?
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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: 20261026T152433Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Well hope someone can shed some light on this. I�m currently in the process of inspecting the heads on my old engine that suffered a jumped timing chain, and the damage it made on the valves on one cylinder. I know that there are two versions of exhaust valves, 99610511359 and 99610524700, the change was made around -99 and my car is a -99. The engine seems to be the original, cast dates are from -98 on various places. Now the strange part: When removing two exhaust valves from one cylinder I find that they are different versions, one 99610511359 and the other 99610524700... They have the same level of carbon deposits and looks identical so they seem to have been in the engine for a long while togheter. The question now is what are the difference between them? Are they interchangeable? I need to replace them both but with what version? One of each as it was or what?

POST 2Original post

The part number 996.105.113.59 has been superseded by 996.105.247.00. Look here: https://www.sonnenporscheoemparts.co...99610511359%20

POST 3 / ORIGINAL POSTEROriginal post

Thanks! My vendor didn�t list that info, along with a couple of others I looked at. They listed both as available, one version to -98 and the other from -99 and up. I�ll just order the new one then.

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