2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH1999 Boxster white smoke from exhaust - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Check fluids
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 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
After getting home, I parked it leveled in my driveway and checked the fluids.
1999 Boxster white smoke from exhaust - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Check fluids' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check fluids' (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.
Check head gasket, traced the engine block, no issues there
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
Parked it again and checked head gasket, traced the engine block, no issues there.
1999 Boxster white smoke from exhaust - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check oil cap and found a strong vacuum
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 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
Started it again and checked oil cap and found a strong vacuum, so I determined that I needed a new AOS.
1999 Boxster white smoke from exhaust - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace air oil separator
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
Got the new AOS, replaced it myself, and started the car and let it idle for about 15-20 minutes to let the system cycle.
1999 Boxster white smoke from exhaust - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check oil level immediately
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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 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
First, it has been my observation that if I check the oil level immediately after shutting the engine down it indicates lower than it actually is.
1999 Boxster white smoke from exhaust - 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.
2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T133652Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello, this is my first post on this forum. I recently was given a 1999 Boxster with 139k miles as a gift from a friend. When I got to his house, he said that the AOS was potentially going bad and there was a little bit of smoke upon startup, but went away after about 5 seconds and I drove the car 160 miles home with no issues.
After getting home, I parked it leveled in my driveway and checked the fluids. The coolant was fine, but the oil was a bit low so I filled it to about 80% as I did not want to overfill. Light then indicated that my oil pressure was good. The next day, I started it up, and it blew thick white smoke from the exhaust for about 10 minutes straight, so I shut it off. Started it again and checked oil cap and found a strong vacuum, so I determined that I needed a new AOS.
Got the new AOS, replaced it myself, and started the car and let it idle for about 15-20 minutes to let the system cycle. Smoked like before for about 5 minutes and slowly got less and less smoke until there was none. Drove it around the block and it produced more smoke when throttling to above 3200rpm. Parked it again and checked head gasket, traced the engine block, no issues there. There was a slight (and I mean like 3 or 4 drops) trail of coolant coming down the frame by the rear passenger tire. I started it again today and there was barely any smoke upon startup, but again it produced more smoke when throttling above approx. 3200rpm. Is this a coolant issue? My next steps are to drain the system, find the slight leak and repair it before adding more coolant. Any advice or theories helps. Thanks.
Also, the engine runs very smoothly and with a lot of power. There is (from what I can tell) 0 power loss which leads me to believe the engine is in very good shape. The car is absolutely pristine besides a minor dent in the driver door, engine bay is clean, etc. Car was garage kept.
I just recently replaced my AOS.
First, it has been my observation that if I check the oil level immediately after shutting the engine down it indicates lower than it actually is. I am guessing some of the oil is still up in the engine and has not drained down to the measurement level. I believe I get my most accurate oil level measurements first thing in the AM.
Second, when I changed my AOS there was a tremendous amount of oil in the intake manifold. I spent a lot of time and shop rags wiping out the low spots in the two manifolds where oil had pooled. If you have not done so, consider opening up the intake and giving it a good cleaning.
Congratulation on getting the AOS job done. I found it to be particularly miserable. Congrats also on the car running well.
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