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I am intrigued. Attached is a photograph of an oil leak from the front of the engine of my 2010 Boxster S. The pics show the front upper and lower oil pan just below the front engine mount when the leak was at its worst. Of course this is the 3.4 DFI engine, the car is pristine and has only covered 33,000 kms.
The history is that the leak was diagnosed as a faulty AOS at the last service a month ago and the AOS was changed. But the leak persisted, not a lot, occasionally a spot on the garage floor but not always. Looking from above and from behind the front seats the engine appeared to be completely dry above the upper oil pan. Also the PDK had become very sluggish and unpredictable when taking off from a standstill but otherwise the car appears to run fine.
When I reported back to the dealer they advised that both problems were caused by the AOS. They said that the new AOS was a faulty part and happily agreed to replace at no cost. This has now been done and after a hot 250 km run the leak has stopped but there is still some oil residue around the lower pan. But nothing like in the attached picture. The dealer advises that this is oil leaking from the intakes left from the bad AOS and that it will clear over time.
Miraculously the PDK is back to perfection so I guess the dealer knows his stuff. But does this make any sense?
My 1998 Boxster suddenly had hot start issues where if left in the sun here in Texas for a few hours would then crank but not fire unless you kept cranking and pressed the throttle. No issues when starting cold. It had thrown some evap leak codes a few times and a secondary AI once but nothing consistent and would also suffer from idle issues if hot start was hard.
Having read many threads I decided that it was not fuel pressure related as in my experience fuel pumps either work or they do not and the same applies to the associated relay.
I read someone blocked off the valve under the lhs air intake plenum and when I did this the hot start problem disappeared but gave other idle issues.
I decided to replace this valve and in the process also decided to clean the throttle body and iacv when I discovered oil in the aos and j tube the aos was replaced 3 years ago.
Having replaced the valve and the aos the car appears to be running better than ever.
I had no white smoke issues or oil cap pressure test problems and the old valve was in the closed position when I removed it so that may not have been an issue.
This whole situation had gone on for many weeks and also gave air leak codes in both banks but using a smoke generator revealed no issues.
My 2004 Carrera coupe has developed a leak. It started after I flushed my cooling system. Rather sure it is around the AOS/associated lines. I've read various opinions about the difficulty of removing the AOS. But what I am interested in doing is just replacing those lines. Any experience or opinions on doing this? Specifically, is it even possible? Especially if this can be done without removing the intake manifold?
Also I am only finding the upper oil separator coolant hose. What about the second one?
I plan to replace the RMS and IMSB on my 2003, Carrera, Coupe, 3.6, Tiptronic. I have read about the MB version of the Tiptronic requiring the removal of the trans/engine together while the ZF can be removed separately. Is this true and how can I determine which one that I have? I crawled underneath and could not see an I.D. tag. So far I have found conflicting information regarding the trans. in this car.