11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHRMS Fix Permanent?
Reported or suspected cause
be replaced, since it'll be accessible at
Reported cause
No successful repair reported for this finding.
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Identified cause
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Suspected cause
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Reported fixes
Read evidence and context
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Discussions that report identifying a cause
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Reported cause
Most mechanics recommend that a leaking RMS be replaced only when the clutch is due to be replaced, since it'll be accessible at that time.
Leading evidence: 'be replaced, since it'll be accessible at' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'be replaced, since it'll be accessible at' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Install backwards' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
As far as GT3's are concerned the 997 models have the Turbo seal installed backwards to reduce drag & thus increase high rpm power by 1 horsepower.
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Performed · outcome unconfirmed
Some 997 GT3 owners have elected to have a new RMS installed facing the same way as the Turbo which usually cures the leak but costs the extra 1 horsepower.
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 performed work without a confirmed outcome
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Performed · outcome unconfirmed
I consider a 997 style RMS installed with the correct Porsche tool "permanent" on a 996.
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 performed work without a confirmed outcome
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Performed · outcome unconfirmed
To answer your question, NO, the fix is not a permanent fix, as a matter of fact, a good majority of those who have had their RMS replaced have it done down the road.
Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
Some 997 GT3 owners have elected to have a new RMS installed facing the same way as the Turbo which usually cures the leak but costs the extra 1 horsepower.
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
To answer your question, NO, the fix is not a permanent fix, as a matter of fact, a good majority of those who have had their RMS replaced have it done down the road.
Use common off-sets the motors are completely different
No successful repair reported for this finding.
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Reported fixes
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Unsuccessful attempts
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Discussions
Read evidence and context
Discussions that contain suggestions
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Suggestion
The GT3 doesn't have the issues that the common 996 does have, although the bodies are designed the same and use common off-sets the motors are completely different.
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.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Are RMS repairs done correctly on a 996 considered to be permanent? Is a 996 GT3 any different? Are resale prices impacted by a replaced RMS?
Any help is appreciated as I have no experience with water cooled cars.
Thanks,
Rear Main Seal leaks are really only considered an annoyance by most. If one were to leak, it usually leaves a small drop on the floor, much like our air cooled cars have a tendency to do from their myriad oil leak areas. Most mechanics recommend that a leaking RMS be replaced only when the clutch is due to be replaced, since it'll be accessible at that time. The seal itself is only about $15 to $20.
I just had a good friend of mine (who happens to be a mechanic for a local Porsche dealership) replace my clutch, RMS and IMS. The Intermediate Shaft bearing and support flange are the items that really should be replaced during a clutch change. LN Engineering sells a re-engineered bearing and flange for about $600 that essentially solves the potential for the original poorly designed IMS bearing to fail and take the engine with it. Peace of mind.
Resale prices are not impacted whatsoever by the RMS seal replacement. IMS upgrade is actually a big plus for most educated buyers.
The GT3 uses a completely different engine. It's basically a water cooled version of your air cooled engine.
To answer your question, NO, the fix is not a permanent fix, as a matter of fact, a good majority of those who have had their RMS replaced have it done down the road. Sometimes a lack of actually driving the Porsche can play tricks on its return...
Resale in most cases are not effected as most buyers are not concerned, it doesn't mean you won't be questioned by someone but it's not a common buyers question. 450 is right though, the LN bearing and flange kit can be a great selling tool.
Shopping? We'll I'm thinking about and 04/05 GT3. I called on a '04 GT3 and told the RMS was already replaced. I have read that it's more common issue in the 997 GT3.
The GT3 doesn't have the issues that the common 996 does have, although the bodies are designed the same and use common off-sets the motors are completely different.
The RMS issues usually fall prey to the NA 996 C2 C4 C4S, not GT3, GT2 or Turbo cars. I'm not saying it's impossible, just not likely common.
I consider a 997 style RMS installed with the correct Porsche tool "permanent" on a 996. As far as GT3's are concerned the 997 models have the Turbo seal installed backwards to reduce drag & thus increase high rpm power by 1 horsepower. Installing the RMS backwards requires the engine to be running to fully seal so a small leak is to be expected when the engine is not running for a long time. Some 997 GT3 owners have elected to have a new RMS installed facing the same way as the Turbo which usually cures the leak but costs the extra 1 horsepower.
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