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Well at about the 3rd month of ownership 2 years ago, I realized I needed a new Air/Oil Separator because of 2 reason; 1) Puff of blue smoke every month or so. 2) leaking lots of oil from the bellows tube/accordian tube at the rear of the engine.


Between the time i noticed and the day I finally replaced the A/O Separator I've had a bad vacum leak and idle became progressively worse as time went on. So I bought the newest A/O S and J-Tube... Reset the cars computer and started her back up and BAM....... smoothest idle I've heard & felt from this car in over a year. And i can feel alot of lost HP come back in the Hi RPM's that wasnt there due to the vacum leak. I've driven it 98 miles since i did the AOS replacement and no CEL's and idle is still smooth and always just acouple hairs below 800rpm mark on the dash.

I've also noticed that Im not blasting through fuel as quickly.

Replacement took me about 40 minutes counting placing the top in service mode and replacing all the covers when i was finished.... I also pressure washed all the year in a half of oil and dirt stuck to the right-rear side of the engine as a result of the leaky AOS.


Thanks goes out to Eli & Richard (Pcars.com) for suppling the parts I needed at a good price!

  aren040

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  daytrader

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Well then, you are all set to go to the auto-x in July. Congrats on getting it back up to top shape.

-aren

Thanks Aren, I guess I never really noticed right away that I was progressively losing power as the tear in the AOS bellows got worse, but now that its fixed... acceleration is alot smoother and alittle deeper in tone, my guess is its not running so lean anymore now that there isnt a leak down there anymore. Im so happy, almost as happy as when Marius hooked me up with a PSE!

  daytrader

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  aren040

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  daytrader

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Carlos, I asked Todd to help me with the replacement sometimes in the next few weeks. Can you come? I need your expertise on it.

Ill have to look it up and see whats needed for your 996 AOS replacement, I think your AOS replacement is a 6 hour job if im not mistaken.

  daytrader

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Carlos, I asked Todd to help me with the replacement sometimes in the next few weeks. Can you come? I need your expertise on it.

Ill have to look it up and see whats needed for your 996 AOS replacement, I think your AOS replacement is a 6 hour job if im not mistaken.

Yeah, removing the throttle body, plenum, left intake cover. Remove two screws located on AOS from underneath the car above the header.

Theres also the hose clamp on the bellows tube.... Peter, Do you have smoke on start ups? or just oil leak and sometimes bad idle?

  daytrader

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Carlos, I asked Todd to help me with the replacement sometimes in the next few weeks. Can you come? I need your expertise on it.

Ill have to look it up and see whats needed for your 996 AOS replacement, I think your AOS replacement is a 6 hour job if im not mistaken.

Yeah, removing the throttle body, plenum, left intake cover. Remove two screws located on AOS from underneath the car above the header.

Theres also the hose clamp on the bellows tube.... Peter, Do you have smoke on start ups? or just oil leak and sometimes bad idle?

I have buff of smoke after hard driving for a year now but not so bad. No leak! I think it's time to get it done. Maybe a 60K service is in order too.

Carlos, with 60K do you need to partial drop the engine to replace the spark plugs, fuel filter?

I'd have to look it up but on the 986 boxster and 987 its not required. If it is for 996, its not tough so long as you have a lift and engine support.

  blueILLUSION97

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I have noticed that my engine compartment has some oil in there and a bit under the car but it never leaks on the floor. And there were a couple of times where it spit some smoke out when starting....i hope mine is not going yet....How many mile can you drive on a tank Carlos? when i just got my car i could get about 350 then later 300 now only 250 before light comes on. And i tryed to drive nice not helping

Well before i've guess'ed about 250 per tank but i dont know how well yet since the AOS, ill let you know the next time i fill up the tank.


Puff of smoke on start ups on a daily driven boxster is a sign of AOS failing internally

Oil leaks on the right rear of the engine is a sign of ripped bellows tube on AOS and or Oil fill tube seal leak.

Also, hows your idle? have you noticed it getting alittle irratic since the drop in mileage or notice of oil on the engine?

Carlos, I asked Todd to help me with the replacement sometimes in the next few weeks. Can you come? I need your expertise on it.

Ill have to look it up and see whats needed for your 996 AOS replacement, I think your AOS replacement is a 6 hour job if im not mistaken.

Yeah, removing the throttle body, plenum, left intake cover. Remove two screws located on AOS from underneath the car above the header.

Theres also the hose clamp on the bellows tube.... Peter, Do you have smoke on start ups? or just oil leak and sometimes bad idle?

I have buff of smoke after hard driving for a year now but not so bad. No leak! I think it's time to get it done. Maybe a 60K service is in order too.

Carlos, with 60K do you need to partial drop the engine to replace the spark plugs, fuel filter?

No Peter, no need to drop the motor for either of those... now if you really want the job to be easier then it is a 60K and header job at the same time is sure to cut down on the labor rate. I know someone with a lift....

Peter, Why not just take it to the new shop, The lift will make it alot easier to work on and you can get a good Pcars forum member rate im sure.