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Another AOS question

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHAnother AOS question

Leading reported evidence

Replace since it seems like a good idea

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.

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 may also have the water pump replaced since it seems like a good idea after reading many threads.

Original post Read captured discussion
Another AOS question
Frequently discussed work

Check air oil separator

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 know i once read a thread on measuring crankcase pressure to check AOS but could not find in in my search.

Original post Read captured discussion
Another AOS question
Read full discussion summary

Leading evidence: 'Replace since it seems like a good idea' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'aos is bad, having too much vacuum' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check air oil separator' (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.

Read captured replies

1 matching discussions · 5 captured posts examined · 0 partial discussions

Compare 4 other evidence results

aos is bad, having too much vacuum

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 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

If smoke is coming out from both sides, it's likely the AOS is bad, having too much vacuum.

Original post Read captured discussion
Another AOS question

Check air oil separator

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 know i once read a thread on measuring crankcase pressure to check AOS but could not find in in my search.

Original post Read captured discussion
Another AOS question

Check pressure

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 decided to buy a second oil filler cap so to hook up my manometer and check pressure.

Original post Read captured discussion
Another AOS question

Replace plugs, belt, oil and other lube items

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

Did not want to spend more than needed at my 60k service since I will be replacing plugs, belt, oil and other lube items.

Original post Read captured discussion
Another AOS question
Frequently discussed actions (5)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check air oil separator

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 know i once read a thread on measuring crankcase pressure to check AOS but could not find in in my search.

Original post Read captured discussion
Another AOS question

Check pressure

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 decided to buy a second oil filler cap so to hook up my manometer and check pressure.

Original post Read captured discussion
Another AOS question

Replace plugs, belt, oil and other lube items

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

Did not want to spend more than needed at my 60k service since I will be replacing plugs, belt, oil and other lube items.

Original post Read captured discussion
Another AOS question

Replace since it seems like a good idea

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 may also have the water pump replaced since it seems like a good idea after reading many threads.

Original post Read captured discussion
Another AOS question

Use manometer

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

You can use a manometer on the oil filler tube to measure the vacuum on a warmed idling engine.

Original post Read captured discussion
Another AOS question
Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

aos is bad, having too much vacuum

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
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

If smoke is coming out from both sides, it's likely the AOS is bad, having too much vacuum.

Original post Read captured discussion
Another AOS question
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.

5 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.

1 acknowledgements have no verified action link; they do not establish a repair result.

Outcome without a verified action link

After bringing engine to operating temp (water just to temp but still not driven for extended period of time) it was around 4.8 in WC

Original post Read captured discussion

No unique explicit quoted action; no causal link assigned

Generation: 20261026T181445Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I know i once read a thread on measuring crankcase pressure to check AOS but could not find in in my search. I decided to buy a second oil filler cap so to hook up my manometer and check pressure. Here is what I got: 1. At cold start up the pressure was 5.68 in WC 2. After idle for 5+ minutes it was 5.37 in WC 3. After bringing engine to operating temp (water just to temp but still not driven for extended period of time) it was around 4.8 in WC Hope someone could point me to the previous thread about this or verify that my readings are in the comfort zone for the AOS. Getting ready for 60k service so just wanted to check. Thanks

POST 2Original post

Quotes source post: 13854899

Can't put my hands on a previous thread but you might find the info at this link of some help: http://www.pelicanparts.com/techarti..._Separator.htm While it references a Boxster AOS the pressure reading for a 996 should be about the same.

POST 3Original post

"You don't have intermix then. If smoke is coming out from both sides, it's likely the AOS is bad, having too much vacuum. You can use a manometer on the oil filler tube to measure the vacuum on a warmed idling engine. It should be about 5" to 10" of water." The above is from a forum guy who knows his stuff(Ahsai). Looks to me you are in the ballpark!

POST 4 / ORIGINAL POSTEROriginal post

Quotes source post: 13854941

Thanks Macster, the Pelican Parts link identified that the crankcase pressure should be between 4 - 7 in WC so looks like I am ok. Did not want to spend more than needed at my 60k service since I will be replacing plugs, belt, oil and other lube items. I may also have the water pump replaced since it seems like a good idea after reading many threads.

POST 5 / ORIGINAL POSTEROriginal post

Thanks Wildbilly32, NO, I do not have any visible signs of failure, just wanted to check.

This is a source reference. Confirm exact model applicability in the original material.