17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHCoolant leak help
Reported or suspected cause
aos�
Reported cause
No successful repair reported for this finding.
1
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0
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Discussions that report identifying a cause
1
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Leading evidence: 'aos�' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'aos�' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace 120k unit last fall' (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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Performed · outcome unconfirmed
I replaced my 120k unit last fall, solved that leak.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Run along various hoses and drip down slightly away
Suggestion or failed attempt
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Unsuccessful attempts
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Discussions
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Suggestion
Drips can run along various hoses and drip down slightly away from the source.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey everyone!
Came home from work yesterday and noticed a few drips of coolant under the engine. They are from the front left area between the trans and engine. It is coming from above. Waterpump is only a year old and dry, nothing in the oil, coolant tank is full, no warning lights, temperature is great, the drips only amounted to maybe three tablespoons.
I have not got it up on a rack, or the dealer yet.
Thinking aos lines????
Could be the plastic expansion tank or one of the hoses connected to it. Drips can run along various hoses and drip down slightly away from the source.
Have a good look in/around/behind your coolant expansion tank with a small mirror if you can. Cracks can form in the plastic tank and leak under high heat & pressure.
And when mine puked coolant, I changed the tank. The crack was not visible. I had to pressurize it to 20PSI to see a leak. It puked once. After puking, drove it home 40 minutes and didn't puke again. But there was a crack.
My tank gave out at 62k, also leaked while hot - although the leaks from that were obviously on the left side, maybe not quite as far up as these may be. I was able to spot some general moisture just with my phone's flashlight around the lowest parts of the tank, where it had been collecting as it seeped out, without much trouble. I tend to stick my phone in tight corners and take photos with the flash on to get some weird angles. In hindsight, the tank was horribly yellowed and I could've seen it coming.
Thanks for the replies everyone! I will be getting it on a rack first of next week.
Another clue is that it does not leak/drip unless it is up to temperature, running or not.
Yes, I had the same issue even though I had replaced the tank a few months earlier; purchasing a "Porsche" part seemed to fix the issue.....although I would rather have a better solution than the fantastic plastic tank. However, we can all moan and growl about various maladies of the 996, in comparison, after reviewing this Car Wizard episode, we are so fortunate that despite all, we are able to accomplish essential maintenance and fault finding without the drama of the attached link from the Car Wizard.....I sometimes need to remind myself to stop the self-exculpation about the 996.......even removing our motors can also be done without all these issues.
You Tube
Took it to the dealer, it was the aos�..
Got a free Macan loaner, 2 year warranty with unlimited mileage, and I am good! My wallet does not share my enthusiasm�.
