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911uk

Oh No!.. Piston rings or Valve stem oil seals???

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHOh No!.. Piston rings or Valve stem oil seals???

Leading reported evidence

Replace oil

Performed · outcome unconfirmed

No successful repair reported for this finding.

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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.

Performed · outcome unconfirmed · Original poster

Just done an oil change, replaced oil with fully synthetic 5w 40 along with new filter.

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Oh No!.. Piston rings or Valve stem oil seals???
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Leading evidence: 'Replace oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace oil' (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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Run /warm, or if it is started

Suggestion or failed attempt

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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.

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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 · Original poster

There is no sign of smoke once the car is running/warm, or if it is started again after a short period..

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Oh No!.. Piston rings or Valve stem oil seals???
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.

Replace oil

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

Just done an oil change, replaced oil with fully synthetic 5w 40 along with new filter.

Original post Read captured discussion
Oh No!.. Piston rings or Valve stem oil seals???

Run /warm, or if it is started

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

There is no sign of smoke once the car is running/warm, or if it is started again after a short period..

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Oh No!.. Piston rings or Valve stem oil seals???
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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.

7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • 911uk: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

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Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I know these can give a little puff of smoke lasting a few seconds when they start.... But mine is bellowing out oily smoke for a good 10 seconds after it has been stood for 24hr + Once the initial 10-15 secs have past the smoke clears and everything is ok..... Just done an oil change, replaced oil with fully synthetic 5w 40 along with new filter. (8.3L of oil) The smoke was occuring before the oil change, I thought maybe the old oil had broken down and was passing the piston rings? There is no sign of smoke once the car is running/warm, or if it is started again after a short period.. say 6-8 hrs Any advice? I intend doing whatever is needed myself as i have a garage with ramps..

POST 2Original post

oil from breather tends to build up in the corrugated inlet pipe just after the MAF, once the gulleys are full, maybe a tea spoon's worth the engine then gulps it in hence smoke. To check if this is happening after a spirited drive when all's cooled down, take off the air filter and look into the pipe see if its holding bit of oil.

POST 5 / ORIGINAL POSTEROriginal post

Is the AOS a service replacement part? or is it an expensive repair?

POST 6Original post

As far as I remember it was not too bad on amanual car but much more difficult on a tip car as other bits have to be removed to get at it

POST 7Original post

About £50 for the part and a couple of hours to fit IIRC.

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