31 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOh no what has happened to my oil
Leading reported evidence
Clean goo away, took a long drive
Performed · outcome unconfirmed
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0
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1
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Performed · outcome unconfirmed · Original poster
cleaned all the goo away, took a long drive with lots of revving, coasting and on idle, no goo produced that was visible.
Leading evidence: 'Clean goo away, took a long drive' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'filler cap not being correctly tightened combined' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check interest' (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
Car seems to be perfectly happy being used all the time and doing everything a civic can do.
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Suspected cause · Original poster
I do hope that this is caused by the filler cap not being correctly tightened combined with it staying outdoors all winter with lots of rain.
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Suggestion
Simply drive for longer periods of time or clean the oil tube more frequently in the winter time.
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31 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T144324Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello guys, today I noticed something horrible.
I saw that the oil level had dropped since I put new in six months ago when the IMS, RMS and clutch got replaced. So no biggie I just have to give it a dash of oil, I thought. Opened up the oil filler cap and this horrible sight appeared.
I do know my way around cars and I do know what can cause this, water mixed with oil. But I cannot understand how this could have come about.
Car description:
2002 911 Carrera, 3.6 with full service history.
Symptoms:
thick gooey mass at the top of the oil filler pipe, right under the cap itself, could not see anything further down
the colour of the oil from the dipstick is normal, dark translucent brownish, simply good oil colour
the oil level has dropped about to the half way mark since October, I have done about 5 000 KM
there are particles of rust in the goo
there was also a bit of water remarkably, like a small tiny puddle in the goo, can be seen in the picture at the bottom
I noticed that the oil filler cap was not tightened correctly when I opening it
cleaned all the goo away, took a long drive with lots of revving, coasting and on idle, no goo produced that was visible.
no smoke other that the normal amount at start up, typical of boxer engines
normal engine temperature, about 80C
I do hope that this is caused by the filler cap not being correctly tightened combined with it staying outdoors all winter with lots of rain.
Any thoughts and advice on what to do about this?
It could be, (I could be 100% wrong too) but it could be due to coolant and oil being allowed to mix which if true could indicate you have a head gasket leak somewhere.
I have searched around a bit and found that there are others having or have had the same issue.
http://www.6speedonline.com/forums/9...r-oil-cap.html
https://rennlist.com/forums/996-foru...er-tube-2.html
As this was not present at summer until the end of October, and I live in Norway with cold temperatures and lots of rain. Also use the car as a normal car with lots of short driving. I hope it is because of this. Will borrow a friends camera to take a look down through the oil filler pipe.
When I left my oil cap loose once, it threw a Check Engine light. Took it into dealer and they told me if the oil cap is not on properly, it will throw the CEL.
I have heard that short drives will cause goo you see, drives where engine temp does not come up to normal operating temp. Never take your Porsche for 1 - 2 mile drives.
It's hard to imagine that kind of aggregate would occur from a loose cap and any resultant percolation that might have caused but those threads say otherwise.
A fairly common and harmless issue. Usually happens when your car sits for awhile and you only take it out for short trips. The oil never gets hot enough and condensation forms causing the goo.
The best solution is to drive it more often. Drive it longer, and get those revs up!
Good luck.
I hate to be a spoiler but this is such a common occurrence I'm surprised. Even a quick search on Rennlist or Renntech yields many threads regarding this. OP - nothing is wrong with your oil, engine, cap, etc. It happens in any make of car. Take your car for a long drive of 30+ miles at full engine temperature and that will all go away. Cars were designed to be run, so a spirited drive will clear this up.
Look at post 9 in the thread referenced above. This happens to air-cooled cars also.
I drove VW bugs as DD for a number of years. Some winters the air-oil emulsification would completely block the oil filler and breather.
Yours is a little more then most folks find in their 996 oil filler, but most don't live in Norway's type of climate. If your reservoir doesn't look like that and your oil is clean you probably do not have a problem.
I think we should compile an FAQ list for 996 and put it as a sticky.
- goo in oil filler tube
- IMSB and the 20 different bearings and solutions
- Smoke on startup
- N2 tires and alterntatives
- OE transmission fluid and alternatives
- OE coolant and alternatives
- how to open locked frunk
- ......
Thank you all, I have now read, checked and even probed my engine with a camera. No sign of intermixing of the fluids.
A friend came by with his 996 and a camera probe, he also had the mayo infestation (to his surprise), but was not as hard hit as me. My car has to endure being parked outside while his is neatly tucked away in a garage. I also think he is heavier on the fun pedal than me, I guess I also should enjoy the car more and let it perform more often.
So only one thing to do, take it out for a spin and be happy I really love my car
Take a look at the oil on your dipstick. Does it show contamination? Also look at the coolant, any contamination? If not you are probably ok, just water vapor/condensation from cold weather. If you have sludge on the dipstick or in the coolant tank then you have a bigger problem.
If your car doesn't smell like hot brakes, clutch smoke, and coolant at least once a week, sell it and buy a bus pass.
OP, what's the status of your car? All things get better after an extended drive?
From what I gathered, this is the symptom of the infrequently driven cars in colder temperatures.
My oil filler tube is absolutely clear, oil cap is also clear of any residues. In 10 months I had the car, the longest period it was not driven was about 5 days right after I got it. Porsche is basically my de-facto daily driven for anything but major grocery runs. Car seems to be perfectly happy being used all the time and doing everything a civic can do.
Just to reaffirm that cold temperatures cause the white murky buildup. It's TRUE! When temperature was under 35 degrees F I noticed the goo, but this week it's up to 65 and the filler tube is black and goo free.
This is my second 996 with the same behavior. I live in Wisconsin.
And it's an issue with any engine that's not brought up to temp long enough, and this is just one of the issues we can see, the exhaust is another place condensation likes to hide...
Take it from a fellow Northerner Arne, you are fine.
Simply drive for longer periods of time or clean the oil tube more frequently in the winter time.
I clean mine every 1,000 kms or so and always find water attracting yellowish gooey mayo as my DD commute is not long enough, unfortunately.
I wipe it clean with a lint-free rag.
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