6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHA few observations/questions while the exhaust is off?
Leading reported evidence
Use on my panamera intake valves
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Performed · outcome unconfirmed · Original poster
I went with several rounds of the Seafoam GDI spray I use on my Panamera intake valves with brushes, and then moved on to a small flapper sanding wheel with my dremel to clean most of it up.
A few observations/questions while the exhaust is off?
Frequently discussed work
Clean most of it up
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 went with several rounds of the Seafoam GDI spray I use on my Panamera intake valves with brushes, and then moved on to a small flapper sanding wheel with my dremel to clean most of it up.
A few observations/questions while the exhaust is off?
Read full discussion summary
Leading evidence: 'Use on my panamera intake valves' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'most reliable car i�ve ever owned' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Clean most of it up' (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.
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 suspect a cause
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.
A few observations/questions while the exhaust is off?
Clean most of it up
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 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 went with several rounds of the Seafoam GDI spray I use on my Panamera intake valves with brushes, and then moved on to a small flapper sanding wheel with my dremel to clean most of it up.
A few observations/questions while the exhaust is off?
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.
Clean most of it up
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 went with several rounds of the Seafoam GDI spray I use on my Panamera intake valves with brushes, and then moved on to a small flapper sanding wheel with my dremel to clean most of it up.
A few observations/questions while the exhaust is off?
Use on my panamera intake valves
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 went with several rounds of the Seafoam GDI spray I use on my Panamera intake valves with brushes, and then moved on to a small flapper sanding wheel with my dremel to clean most of it up.
A few observations/questions while the exhaust is off?
Coverage and how to read this overview
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.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 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: 20261027T003124Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Should I even worry about doing any exhaust port cleanup beyond new gasket mating surfaces? There is some clear build up inside the ports, but I dont think it�s bad for the mileage. All six ports and inside the exhaust manifolds are really even and similar in coloration with no clear signs of old ball oil consumption to one or more cylinders.
What are the thoughts on the pictures from some of the more experienced brains on the forum?
I would worry more about your muffler brackets . That is a rusty mess . Take them off , wire brush them and hit them with some high heat paint . I did mine in silver and they have held up well . Put anti seize compound on all nuts and bolts . How do you plan to clean up the exhaust ports ?
I actually have new muffler brackets in a box for that very reason and had planned to change them. But so far every part of this project to install my Agency Power headers has been so smooth and relatively low on the PITA scale that I don�t want to tempt karma by lowering the engine to get to the upper hardware. That rusted nasty mess there is on the lower section is still solid, I was surprised. Now all have to do is rehang the PSE mufflers and put the bumper back on. It�s always sounded great but I�m hoping the headers will give it a change in tone. We will see tomorrow�
I went with several rounds of the Seafoam GDI spray I use on my Panamera intake valves with brushes, and then moved on to a small flapper sanding wheel with my dremel to clean most of it up. It wasn�t as hard as I was expecting (same goood karma theme here)
The reality is that the engine has over 244K miles now and as long as it makes it to 250K I am going to drop the engine and do the IMS Solution and UAOS (and UIDS if the $ are there). It will be easy to swap the brackets out then. Then I�ll have the IMS bearing that comes out mounted on a plaque for probably being the only original factory 996.2 IMS bearing to make it to a quarter million miles.
One day the motor will have to be rebuilt I have no doubt, but right now I have no signs/symptoms of scoring, timing chain pad wear, cam deviations are literally as close to perfect as possible (0.11 on #1 and 0.0 on #2). I just did my 30th oil change on the car in the 10 years I�ve had it. This car is a long term keeper for me, so nothing I do is about maintaining a sense of value, only about reliability and driver engagement. It�s worth more in pieces than it is as a whole car. In another 25 years it will labeled a �survivor� if it makes it.
I feel so bad for all the peoples stories on Rennlist with their ownership nightmares and bad experiences with the 996, because my personal experience has been quite the opposite. Probably the most reliable car I�ve ever owned. But I could have just as easily been on the same boat for never replacing the IMS.
They were sprayed with Aerokroil several times in preparation for removal before I decided I didn�t want to lower the engine. Have the new hardware and brackets back in the box on the shelf for now.
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