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YOUR RESEARCHPorsche Boxster 986 engine trouble? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Replace aos so you don't hydro lock your engine

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Suggestion
replace AOS so you don't hydro lock your engine on oil.
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Porsche Boxster 986 engine trouble? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Replace aos so you don't hydro lock your engine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace aos so you don't hydro lock your engine' (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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Frequently discussed actions (1)

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Replace aos so you don't hydro lock your engine

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
replace AOS so you don't hydro lock your engine on oil.
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Porsche Boxster 986 engine trouble? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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

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POST 1 / ORIGINAL POSTEROriginal post

Hi guys, I know there's lots of threads about white smoke coming from engine exhaust and most likely the culprit would be the AOS, and sometimes it's just normal, but I have a weirder problem I guess :-). First of all, my engine is a 2000 2.5L with around 140k kms (87k miles) on it. Last time I drove the car everything was fine. I used it again a couple of nights ago, and after like 30 minutes, it started making a loud whistling noise(like a fan belt slipping), which was embarrassing in traffic in the middle of the CBD. I kept an eye on the engine parameters and all was fine. After the event we attended, we waited for everyone to leave to avoid the embarrassment, but when I started the engine, everything was fine. That's until this morning, when I was going to fill the car, as soon as I started, a big, thick white smoke came out of the exhaust with a bad smell of burnt oil. Turned the engine off immediately, started again, with less smoke, but still calling Indian chiefs. Can anyone please help? Did anyone has this happening before? Thanks in advance guys, and a belated happy father's day to those who celebrated it yesterday (I still have to wait until September for mine :-) ). Cheers and regards to all.

POST 2Original post

Big smokescreen + whistling... replace AOS so you don't hydro lock your engine on oil. The whistling is your tell that the AOS diaphragm is shot and that the engine vacuum is pulling oil into the intake.

POST 3Original post

Quotes source post: 454820

Agree...that's what mine did when it went...

POST 4Original post

mine went at about 70K miles. Seems to be the neighborhood for most I've seen posted here. AOS is one of the parts that can take down the engine along with water pump, coolant cap and not servicing the IMSB. Opinions seemed to be mixed on whether the AOS should be done proactively.

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