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YOUR RESEARCHoily plastic pipe on top of motor! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace aos wasn't careful enough
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Performed · outcome unconfirmed
I assumed the mechanic that had recently changed the AOS wasn't careful enough when reinstalling it.
oily plastic pipe on top of motor! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Replace aos wasn't careful enough' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean /shiny)' (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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Suggestion · Original poster
(I wiped off part of it & that's why it looks clean/shiny).
oily plastic pipe on top of motor! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Clean engine
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Suggestion · Original poster
I hate having that messy area on an otherwise nice clean engine!
oily plastic pipe on top of motor! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Fill hose wasn't sealed properly
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Suggestion
Mine was oily and I discovered that the engine side of the oil fill hose wasn't sealed properly.
oily plastic pipe on top of motor! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace clamps
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Suggestion
Once you get it off, replace the clamps with screw-type clamps.
oily plastic pipe on top of motor! - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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Generation: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I decided to replace the power steering cap o-ring as it looks like it has been leaking.
I also noticed the oily mess on this pipe near the AOS. (AOS was tested about 2500 miles ago and was OK.) Any ideas where this mess comes from or is it just normal dirty engine grime? Also what is this hard plastic tube for? (I wiped off part of it & that's why it looks clean/shiny).
Thanks.
Aha! I think I have answered my own question. It is the oil filler tube! I guess I may have a leak at the top or bottom. I think there are some o-rings I can replace.
Mine looked grimy too, before I replaced it while doing my coolant tank. But I couldn't find any evidence of any dripping. I think it was just general engine grime.
Yup, oil filler tube. They are famous for cracking in the "accordion" flex section. Not only does it get messy, but it also creates a vacuum leak that can lead to rough running and a CEL. Replace the whole pipe.
Thanks for the info. Replacing it sounds like a good idea. I hate having that messy area on an otherwise nice clean engine!
It looks like a pain to access.
It is a pain to access, particularly if it still has the spring clamps. Once you get it off, replace the clamps with screw-type clamps. Your knuckles will love you for it.
Mine was oily and I discovered that the engine side of the oil fill hose wasn't sealed properly. I assumed the mechanic that had recently changed the AOS wasn't careful enough when reinstalling it. I installed a new one just in case. Access is tough but the remote hose clamp pliers I saw written about on this forum made it so much easier.
just replaced mine last night, both the pipe (to the engine) and the tube (flex part to the trunk). the screw type clamp would be fine for the connection between the two parts, but for the connection to the trunk it would be hard to get in there to tighten.
I use this for the spring clamps:
I also didn't remove the intake as I have seen suggested several places. I removed the resonance tube and throttle. then removed the alternator to get to the second bolt.
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