19 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHYellowish goo
Reported or suspected cause
common in cars
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that report identifying a cause
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Reported cause
As others have said, this issue is common in cars that are driven for short trips, especially in colder weather.
Leading evidence: 'common in cars' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'common in cars' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check coolant' (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 had/have the same goo and live in the North Pole, er, Northeast and the car has been used sparingly this past winter.
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Suggestion
But do check the coolant to make sure it perfectly clear.
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Suggestion
Check your coolant overflow tank for any indication of oil.
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19 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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The yellowish goo ("mayonnaise") is an indication that small amounts of coolant are getting into your oil. It may be something minor, but it bears investigation.
Check your coolant overflow tank for any indication of oil.
It's usually just oil vapor mixing with water vapor from the crankcase. Wipe it out with a clean rag and drive the car more often than just short trips to bring everything up to operating temp to burn off the water vapor in the oil. It's especially common if it's been cold or you live in a humid climate.
But do check the coolant to make sure it perfectly clear.
Could just be moisture from lots of short trips and not getting the oil hot-hot.[/QUOTE]
This. In the winter, even with longer trips, this builds up a bit. Happens less in warm weather. If your coolant is clear, don't worry, and keep motoring.
My AIR COOLED (IE - no coolant involved) 81 911 had this same problem because I drove it 3.5 miles one way to work on a regular basis....I know, it killed me to do that to it.....
Just checked coolant and looked fine. I am in virginia climate and have been taking quite a few short trips. Have a trip planed for North Carolina next weekend >6 hours. So I guess I will wipe clean , run it , and see.
Bring along a quart of oil, too. After you burm off the moisture/water, the oil level may drop. Have a good trip. Don't be affraid to visit the redline.
That is correct. As long as it's humid, even long trips you may see build up. As others have said, just check the coolant and engine oil level and condition and you should be fine.
As others have said, this issue is common in cars that are driven for short trips, especially in colder weather. In these conditions, condensation forms in the oil filler neck and causes the oil residue there to emulsify, turning into the goo you found. Running your car for a nice drive at full operating temperature in a regular basis should reduce the formation of goo. This issue isn't unique to Porsche cars.
I had/have the same goo and live in the North Pole, er, Northeast and the car has been used sparingly this past winter. When used it was driven for mostly short trips; 5 to 16 miles one-way with maybe one or two longer drives when the weather allowed this past season. All that plus sitting in a non-heated garage I'm sure contributed to my goo. Looking forward to warmer temps and no snow!
I always look at the oil filler cap for this situation when contemplating a used vehicle purchase & if present it gives me a big "no" as it could be a sludgemobile internally &/or getting coolant into the oil which of course removes its lubricity.
Bob
01 C4
31 Ford cp chp & ch, 302/350
40 ******, 302/350
38 Ford cp, 327/350
57 Belair
62 356B --long ago
As others have said, short trip in winters is what causes it.
Important to note that this is not a 996 specific thing. It can happen in all cars and often does. I can show you the same from my oil cap from my BMW and Acura if that makes you feel better.
This is a source reference. Confirm exact model applicability in the original material.
