8 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSuction from the oil fill tube
Reported or suspected cause
air-oil separator and a fairly common fault
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
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Discussions that suspect a cause
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Suspected cause
Most probably a faulty air-oil separator and a fairly common fault with the F-6 water-cooled engines.
Leading evidence: 'air-oil separator and a fairly common fault' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'air-oil separator and a fairly common fault' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Repair bill (including some other preventative maintenance) and a ride' (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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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.
Suspected cause
The engine did need to be dropped to replace, but that turned out to be quite fortuitous as it revealed some other items that were perished and would have needed replacing soon anyway.
Repair bill (including some other preventative maintenance) and a ride
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that contain suggestions
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Suggestion
But still a 4 figure repair bill (including some other preventative maintenance) and a ride on a flat bed truck !
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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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
The engine did need to be dropped to replace, but that turned out to be quite fortuitous as it revealed some other items that were perished and would have needed replacing soon anyway.
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
The engine did need to be dropped to replace, but that turned out to be quite fortuitous as it revealed some other items that were perished and would have needed replacing soon anyway.
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.
Suspected cause
The engine did need to be dropped to replace, but that turned out to be quite fortuitous as it revealed some other items that were perished and would have needed replacing soon anyway.
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.
Porsche Club GB: 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello all. Question - should there be any suction from the oil fill tube when the engine is on tick-over? I noticed mine has some - I wouldn't say a lot, but there is some.
Many thanks.
Graham,
Most probably a faulty air-oil separator and a fairly common fault with the F-6 water-cooled engines. Often accompanied by a lot of (whitish?) smoke on start-up and something which should be investigated ASAP to avoid potential catalytic converter contamination.
Jeff
Yes there should be some suction, about 5" on a water gauge and that's quite normal.
A faulty AOS would give other symptoms and a lot higher suction sometimes such that you cannot even remove the oil cap its that high.
Andy
Thanks for the quick feedback Jeff, Andy.
Not seen any smoke, white or otherwise, on startup or running. I will keep a closer eye out for white smoke. Will investigate how to measure.
Many thanks, Graham.
Mine suffered from this which triggered the EML after a while, but the car was running well with no obvious noise/smell/visual problems.
I bought an ODB Reader to investigate further and it reported error codes P0171 & P0174 - System Too Lean on Banks 1 & 2.
Initially i thought the Lambada sensors as that seemed to be the consensus on the forums and confirmed by a phone call to my mechanic, but it then started to kick out white smoke. It turned out to be the Air Oil Separator as mentioned by Graham & Andy and the tell was strong suction making the removal of the oil cap difficult.
The engine did need to be dropped to replace, but that turned out to be quite fortuitous as it revealed some other items that were perished and would have needed replacing soon anyway.
So definitely something to keep an eye on.
Thanks for the info Darren. Was your engine removed or just lowered a little to give access?
I did a bit more internet surfing and made a manometer. I reckon that my engine is pulling about 6 inches of water with the engine warm and idling. So not terrible, but not what you might expect in perfect condition.
I will keep an eye out for white smoke and measure again in a few months time.
Engine lowered, although i wasn't there at the time so i don't know by how much.
It actually deteriorated very quickly and went from a few white puffs at start up to puffing like a steam train with any prod of the accelerator and i thought the head gasket had gone, so it was a huge relief that it was 'only' the AOS. But still a 4 figure repair bill (including some other preventative maintenance) and a ride on a flat bed truck !
Thanks for the confirmation Darren - appreciate that.
Like I said, will keep an eye out for smoke and repeat the measurement again in a few months time.
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