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Discussion summary
YOUR RESEARCHHow much oil in the intake is too much?
Leading reported evidence
Run **** out of it
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Performed · outcome unconfirmed · Original poster
And no, the car hasn't been idling for 1000 miles, I run the **** out of it
Leading evidence: 'Run **** out of it' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'be replaced' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace 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.
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Suspected cause
If the oil level not too full and the oil is of the proper type and fresh and you haven't been idling the engine for 1000 miles I'd say the AOS is due to be replaced.
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Suggestion
From overfilling the oil and possibly running the oil too long between oil changes.
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be replaced
No successful repair reported for this finding.
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Suspected cause
If the oil level not too full and the oil is of the proper type and fresh and you haven't been idling the engine for 1000 miles I'd say the AOS is due to be replaced.
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Rennlist: 1 discussions
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I had my manifold off yesterday and there was a bit of oil in the intake plenums. The engine doesn't smoke that I've noticed and I haven't noticed a drop in oil level although I've probably only put 1000 miles on this engine since getting it. There was enough oil in the intake that if turned the right direction I could get a little bit to run out. The AOS has 66k miles on it. Is it time to replace the AOS?
last time I cleaned up mine, and I did have a full quart of oil overfill in the engine, I only had a mist in the intake and plenum. If you have more than that, I think the AOS might be the culprit, but when the AOS is dead it seems it pours oil all over.
I put 10 quarts of oil in it when I installed it in the car. But the engine was more or less completely dry (sat for over a yr and I had the oil pan off). I started with 8.5 qts and over the course of a couple weeks added more until it got to the middle of the dip stick and gauge on the dash, so I don't think it's overfilled.
What is the history of the engine? 1000 miles since getting it? Is the engine a new engine?
Regardless that amount of oil seems excessive. Porsche techs tell me though invariably when they have any reason to gain access to the intake manifold more often than not the intake walls are oil wet. From overfilling the oil and possibly running the oil too long between oil changes.
At 66K miles the AOS is getting close to where it can go bad.
If the oil level not too full and the oil is of the proper type and fresh and you haven't been idling the engine for 1000 miles I'd say the AOS is due to be replaced.
I don't like replacing something before its time but it is clear that the AOS is a wear item and needs periodic replacement. And best to do this on your terms rather than wait for the thing to go bad at some inconvenient time.
Sincerely,
Macster.
Its a used engine with 55k miles on it. I bought it from a fellow rennlister. My old man was at the indie shop today where we get our alignments done and they told him that it's normal. And no, the car hasn't been idling for 1000 miles, I run the **** out of it
. The aos is off my old boxster engine though, and thus the 66k miles on it.
Hard to know how much oil is normal in the intake. It is I think clear the AOS is not up to the job so many engines run with some oil wetness in the intake and smoke upon startup from it.
Still, keep an eye out for any other symptoms like hunting idle, or of course CEL and persistent and prolonged smoking upon startup. An AOS can go from good to bad in practically no time.
Sincerely,
Macster.
