shahrukh_bakar

2018 GT3 6MT. While changing my oil today, I noted the same drop of oil at the crankshaft oil supply hose metal housing. The diffuser tray has oily residue directly below. Pictures attached.

1) What is the natural history of this leak? Does it just keep slowly leaking, or does it let go catastrophically? All the search results mention a slow leak.
2) The part number was updated to 9A1.107.167.93. What were the design changes to the superseded part number ending in 92?
3) Have people with part numbers ending 93 had recurrence of the leak?
4) Is this covered under CPO? I change oil every 12 months, M1 0W40 at much less than recommended mileage intervals. Car is treated very carefully, and is otherwise stock. 21k km. No issues with oil consumption.



Part cost for the updated 93 part number appears to be $511.00.


Oil residue at rear of drip tray.

Oil drop

Oily residue.

9914s

Cpo will cover this.

GrantG

I already posted in the other oil leak thread, but my experience with this is that it continues to drip, but does not leak catastrophically. The new part #93 does not seem much better than the older version (they both leak a similar amount). I've seen the same leak with cars that had the new part retrofitted and with 2019 models that came from the factory with the new part.

Since the 991 is approved for some thicker A40 oils (I think 5W40 and 5W50), I'd try those rather than 0W40 (may leak slightly less).

Overall, I'd just monitor it and clean the undertray occasionally - I don't remember ever seeing this as a very serious issue (where the car leaked more than a very slow drip).

shahrukh_bakar

Thanks, I think I saw your post in another thread as well. I have yet to see a post where this has been a catastrophic problem.

How exactly was the 93 part number modified over the 92 part? I also don’t understand how the part seals up to a rotating crankshaft - is there a rubber o-ring or seal between the metal housing and the crankshaft? I can easily see how that would be prone to leaking? Clearly it has to seal against about 60-70 psi at engine speeds up to 9000 rpm. Must be hard to seal.

GrantG

I don't know - never inspected the part myself.

lawrence1

what is the labor involved to replace this?

GrantG

It's fairly significant out of warranty. I would guess most of a whole day or so. It doesn't require dropping the engine, but it's fairly difficult to access. Given the uncertain nature of the "fix", I would only recommend it if your leak is quite bad or if you're still in warranty and feel lucky

shahrukh_bakar

My CPO ends February 2024 so I have some time to observe it carefully. Will probably raise it as an issue close to the end of CPO.

GrantG

That's smart to create a record of it before expiration. But if the leak is mild and stays that way, not sure I would bother with taking any action.

merc5326

I have the same leak and it's slow. Slow enough to take Grant's advice and just monitor it. But, if you're at the 4 year marker, and you're following the maintenance schedule in the owners manual, a serpentine belt is either recommended or required. So, in that regard, I'm going to have them replace this oil supply pipe. With oil on the tensioner, my Service Manager, as a courtesy, will more than likely absorb the cost of the serpentine belt. I also recently purchased the extended Porsche Platinum warranty, as this one's a keeper for me. Therefore, this swap is even less of an urgent matter, with the additional 6 years of bumper to bumper warranty added to my in service date. I just don't like oil leaks, no matter the volume.

carsisfun

Same situation in my car…

carsisfun

I have similar leaking.

dkhm3

Forgive my ignorance but this an issue for manual cars only?

GrantG

No