10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 Oil leak at AOS
Leading reported evidence
Replace aos and all pipes, or understand if a simple
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
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Suggestion · Original poster
I'm at the point where I'm trying to decide whether to get the garage to strip it all and replace the AOS and all pipes, or understand if a simple tightening or replacement of an o-ring from the top is all that is required.
Leading evidence: 'Replace aos and all pipes, or understand if a simple' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace aos and all pipes, or understand if a simple' (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 contain suggestions
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Suggestion · Original poster
Hi guys, just to check, is this oily hose indeed one that goes to/from the AOS, before I go looking too deep into replacing the AOS and hoses?
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.
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Suggestion
Regardless of which version you have, changing the AOS can be a tough job to a really bitch of a job.
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Suggestion
Determine if its still good or see if u have to replace the entire thing.
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.
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Suggestion · Original poster
I'm hopeful that if it is something minor like an o-ring or hose/pipe that access can be gained to replace relatively simply?
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace aos and all pipes, or understand if a simple
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 at the point where I'm trying to decide whether to get the garage to strip it all and replace the AOS and all pipes, or understand if a simple tightening or replacement of an o-ring from the top is all that is required.
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
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: 20261027T175704Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi guys,
Relatively new to 996 and completely hopeless with mechanicals and engine components but keen to learn.
According to a local garage, it seems my AOS is leaking at the top around an area with three hoses/pipes. It seems it's quite a mess so needs cleaned up before any further diagnosis can be completed. There have been no oil deposits on my drive or any white/blue smoke issues, so I'm hopeful this is either minor or new.
I'm awaiting more information, but just wanted to check if there are any usual suspects that this could be? I've read about an o-ring failing and hoses/pipes perishing.
If anyone had a picture of an AOS with the function and fluid contained within each hose/pipe that would also be ace.
I'm hopeful that if it is something minor like an o-ring or hose/pipe that access can be gained to replace relatively simply?
Thanks,
Kevin
There are two main versions of AOS and you did not post your model year so no one here can really tell. Regardless of which version you have, changing the AOS can be a tough job to a really bitch of a job. There is no easy oring failure and the hoses / pipes are not ever easily accessed.
Hi, great point it's a 2001 (Y plate UK) 996.1.
Having done some reading it doesn't display any symptoms (white smoke on start up) of a failed AOS, so I'm hopeful it's an o-ring or hose/pipe perishing. Sounds like even if it could be that there may me a few hours labour to do any remedial work?
That was excellent thank you, i never thought of YT. Unfortunately seems like a real pain in the *** job to do anything around the AOS. I'm unsure if you have to go to that level of disassembly for a hose/pipe replacement but understand better that it's not a 10 min job to fit a new hose/pipe.
Hi guys, just to check, is this oily hose indeed one that goes to/from the AOS, before I go looking too deep into replacing the AOS and hoses? Thanks
Probably not the hose, but the AOS breather valve located there.
See #6 and 7 in this parts diagram
http://www.autoatlanta.com/porsche-p...section=104-10
Ah right, so there's potential for the leak to be coming from the other end of the hose at the AOS breather valve instead of the AOS itself. The mystery thickens! I'll try get my hand in and clean that hose up as best I can and keep an eye on it. I'm at the point where I'm trying to decide whether to get the garage to strip it all and replace the AOS and all pipes, or understand if a simple tightening or replacement of an o-ring from the top is all that is required.
The first thing u should do is test the aos. All it takes in a manometer, an old oil cap with a fitting and 15 seconds. Tons of threads on this. Determine if its still good or see if u have to replace the entire thing. If so consider the uaos as an upgrade. Lots of threads on the uaos.
If its the cross over hose it can be broken in several spots. It get brittle from the engine heat. It takes a fair amount of work to replace the cross over hose and even if the aos was good i would replace it with the uaos unit if going through the trouble of getting to it.
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