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    Thread: what is this? milky substance around oil cap

    1. Member Spax MC's Avatar
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      12-04-2007 01:36 PM #1
      I installed my neuspeed short shifter today and I decided to check my oil level and add just a tiny bit.

      I took of the oil cap and saw this


      Is that coolant leaking into the engine?


    2. Former Advertiser
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      12-04-2007 01:38 PM #2
      Yep, thats a coolant/oil milkshake.

      Check your oil cooler / heat exchanger and you might want a compression test to check the headgasket.

      Any mods? Is it only around the cap like that or is it in your coolant bottle too?


    3. 12-04-2007 01:45 PM #3
      Quote, originally posted by Robin @ Revo Technik »
      Yep, thats a coolant/oil milkshake.

      Check your oil cooler / heat exchanger and you might want a compression test to check the headgasket.

      Any mods? Is it only around the cap like that or is it in your coolant bottle too?

      Nope, it is most likely condensation buildup from the cooler weather.

      Dave


    4. Member Spax MC's Avatar
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      12-04-2007 01:46 PM #4
      the car runs stock software has milltek tbe and neuspeed intake. when i first got it last november it had tiny traces of this stuff and it went away in the summer. now that the winter comes it's back

      so, back for service it goes (just got my second front bearing replaced last week)


    5. Member Spax MC's Avatar
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      12-04-2007 01:48 PM #5
      Quote, originally posted by crew219 »

      Nope, it is most likely condensation buildup from the cooler weather.

      Dave

      i really hope so, as i said it was gone in the summer the car runs like a champ. i'm going outside to inspect the coolant reservoir


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      12-04-2007 01:52 PM #6
      Dave,

      Most of that should burn off once the oil gets up to temperature. Thats quite a bit, its not trace amounts.

      Spax-- is the car used often? Or just quick short trips?


    7. 12-04-2007 01:54 PM #7
      Quote, originally posted by Spax MC »

      i really hope so, as i said it was gone in the summer the car runs like a champ. i'm going outside to inspect the coolant reservoir

      It isn't coolant. Every year around this time, plenty of n00b posts pop up asking about this. It basically has to do with thicker oils not being able to reach the temperatures to effectively evaporate fuel and water condensation in the oil system. Given that the oil cap is one of the highest parts of the engine, you'll find this residue collected around the oil cap.

      I switch to 0w30 in the winters and notice less of this effect.

      Dave


    8. Member Spax MC's Avatar
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      12-04-2007 01:57 PM #8
      the car is used often for short trips. 3 miles from my house to my gf house. i never ever drive it hard when it's cold. i'm using elf 5w-40 and i check the oil level weekly. the car uses very little to no oil at most half a quart every 5k miles

      thanks for the replies guys


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      12-04-2007 01:58 PM #9
      I usually get a bit of that every now and then, but nothing nearly that extreme

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      12-04-2007 02:06 PM #10
      Take it out and get it nice and hot once in a while, I bet that'll vanish

    11. 12-04-2007 02:08 PM #11
      Quote, originally posted by Robin @ Revo Technik »
      Dave,

      Most of that should burn off once the oil gets up to temperature. Thats quite a bit, its not trace amounts.

      It normally does not fully burn off, not to mention the bout of 20 degree weather we've been having in NY doesn't really allow the oil to ever truely get up to temperature.

      Just changed the oil this past thursday. Only drove the car maybe 3 times this weekend. This is what my oil cap looks like today with fresh 0w30 oil.


      Now multiply that effect with a 5w40 oil that takes longer to get to temperature and short 3 mile trips. My coolant temp gauge doesn't even budge with one mile of driving. The oil isn't going to get heated up that much either.

      Dave


    12. Member Spax MC's Avatar
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      12-04-2007 02:13 PM #12
      would it be better if i started the car early and let it warm up before making the 3 mile trip?

      i remember reading something about carbon depositing when you do that


    13. 12-04-2007 02:15 PM #13
      Quote, originally posted by Spax MC »
      would it be better if i started the car early and let it warm up before making the 3 mile trip?

      i remember reading something about carbon depositing when you do that

      Letting the car idle doesn't warm the engine up as well as driving. If anything I'd consider taking a slightly longer route back from work, or making sure that you mix in a few longer drives a few days each week. The condensation is normal and for the most part, harmless.

      Dave


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      12-04-2007 02:16 PM #14
      I changed the oil in my gf's car this past weekend and found the same but less of it on the oil cap. should just be condensation like Crew said.

    15. Member thutty2's Avatar
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      12-04-2007 02:23 PM #15
      I've noticed this a couple of times on my car also. I figured the f'en dealer had screwed something up during one of it's week long "visits". Funny thing is I never saw this on my 3 previous VW's.

    16. 12-05-2007 08:08 AM #16
      Shot these this morning after only 11 miles (in one outing) being driven on the car since the last pictures. The oil cap and filler were wiped clean after the last pics.


      Guess I have that blown headgasket

      Dave


    17. 12-05-2007 05:00 PM #17
      That my friend is a ****LOAD of "milky white stuff" around your oil fill cap. This condition is commonly associated with a BLOWN Head Gasket. Through my experience... on ANY car I've ever seen that much white stuff on the oil cap, it ALWAYS meant a Blown Head Gasket.
      Sold the VAG COM

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      12-05-2007 05:46 PM #18
      Quote, originally posted by rippie74 »
      That my friend is a ****LOAD of "milky white stuff" around your oil fill cap. This condition is commonly associated with a BLOWN Head Gasket. Through my experience... on ANY car I've ever seen that much white stuff on the oil cap, it ALWAYS meant a Blown Head Gasket.


      Well, your experience is obviously very limited. Read crew's responses, he's exactly right.


    19. 12-05-2007 06:44 PM #19
      Yea I had a cap that looked similar with all the white stuff, my dealer said it was just condensation, he said theres alot of it on there because it probably had never been cleaned off and was just building up on there.

      I cleaned the cap about 3000 miles ago, changed my oil yesterday and there was hardly any of it on there


    20. Member OOOO-A3's Avatar
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      12-05-2007 08:05 PM #20
      Quote, originally posted by crew219 »

      Nope, it is most likely condensation buildup from the cooler weather.

      Dave


      Exactly. If you want to see n+1 people freaking out about this on a daily basis, hang out at rx8club.com for a while. It means nothing. It's just condensation. (Mazda finally issued a recall campaign that modified a breather hose to reduce condensation around the dipstick, and a squeegee liner for the dipstick, because that was easier than trying to explain the truth to people who just wouldn't listen.)

      Seriously, it's nothing. If ALL your oil looks like that, it's something. Otherwise, wipe it off with a paper towel and move on.


    21. Member munky18t's Avatar
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      12-05-2007 08:44 PM #21
      i just checked mine and i have the same amount of white gunk

    22. 12-05-2007 08:46 PM #22
      Quote, originally posted by thutty2 »
      I've noticed this a couple of times on my car also. I figured the f'en dealer had screwed something up during one of it's week long "visits". Funny thing is I never saw this on my 3 previous VW's.
      That's because for one, you probably didn't run 5w40 in your previous VWs, and for some odd reason it seems to take 2.0ts forever to warm up.

      I still don't understand why it's impossible for this car to warm up at idle. Not that it's something I do, but it's just weird. Plus it seems to take forever even when driving.


    23. Member Spax MC's Avatar
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      12-05-2007 08:54 PM #23
      my tech said that the fsi technology is very similar/shares qualities of a diesel

      can someone elaborate? or is it complete bs


    24. 12-05-2007 10:05 PM #24
      yes, they are both direct fuel injection.
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      12-05-2007 11:31 PM #25
      your car got a little too happy/stimulatated, happens to people all the time.
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    26. Senior Member feels_road's Avatar
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      12-06-2007 04:34 AM #26
      Quote, originally posted by rippie74 »
      This condition is commonly associated with a BLOWN Head Gasket. Through my experience... on ANY car I've ever seen that much white stuff on the oil cap, it ALWAYS meant a Blown Head Gasket.


      A prime example of why you need to take anything you read on the intarwebs with a grain of salt (at times, the all the salt used on North-Eastern US roads in the winter does not suffice, though...).

      Aung San Suu Kyi

    27. Member thutty2's Avatar
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      12-06-2007 08:20 AM #27
      No, I use what oil the owners manuals required in all of my previous VW's. I also have a 25 mile commute each way. I first noticed the white stuff on the oil cap after a 250 mile drive. Is the consensus that this condition is normal?

    28. 12-06-2007 09:22 AM #28
      your not running your car hard enough
      need to beat on it, to get it hot enough to evaporate the moisture

    29. Banned Crubb3d Rymz's Avatar
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      12-06-2007 09:33 AM #29

      Quote, originally posted by Dan GSR »
      your not running your car hard enough
      need to beat on it, to get it hot enough to evaporate the moisture

      if the OIL (not coolant, OIL) is not up to temperature...dont listen to the above statement


    30. 12-06-2007 09:35 AM #30
      well, obviously
      that should be without saying

      drive it without WOT for like 15-20min to get it warmed up nice
      then flog it for like 30min, it'll clean right up


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      12-06-2007 10:06 AM #31
      Thats a lot of white stuff. Haven't seen that much since VW switched to the plastic valve covers on the 2.0L 8Vs in the Mk4s.

      Its probably condensation like everyone is suggesting but man that is a lot. with that much I'd always just pull the dip stick and see how it looks in the pan. If that is normal but the cap is white like that then condensation. If the oil in the pan was looking like that then I'd be concerned.

      The issue is more prevalent now with plastic valve covers that remain cold. In the past metal valve covers would heat up with the engine and not have to rely on oil temps as much to evaporate the moisture out. Now it basically just rises to the top as steam.Hits the plastic valve cover and cools back into a liquid mixes with the oil being thrown around by the cams and makes that white milky stuff.

      I am actually glad I put in my oil separator a few weeks back as when I pulled it out to check how much oil was in it to my surprise there was none. But it was full... with WATER. Sure there was a slight bit of fuel smell too it and a slight bit of oil but I had about 8oz of water in it. Which is good that means that very little oil vapor is being whipped around in the head but there is a ton of moisture in there and the separator is pulling it out and keeping it out of the oil, intercooler pipes and engine.


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      12-06-2007 11:03 AM #32
      Quote, originally posted by Dan GSR »
      well, obviously
      that should be without saying

      drive it without WOT for like 15-20min to get it warmed up nice
      then flog it for like 30min, it'll clean right up

      granted i dont have a 2.0T...but i love beating on my rabbit


    33. 12-06-2007 01:06 PM #33
      I just went out and checked mine. 2010 miles and the cap was covered in it, as was the oil fill tube. Just wiped it out. It looks like water. No coolant smell. All is well in FSI land

      I was also pleased to see that the oil was still at max. That was a worry of mine from all the oil use threads.


    34. 12-06-2007 02:54 PM #34
      mine has looked like that soon as winter hits or in the early spring.. Just condenstion, i have 30k with no problems just keep up with the oil changes and your golden.

    35. Member deadguy's Avatar
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      01-02-2008 06:55 PM #35
      Quote, originally posted by Spax MC »
      I installed my neuspeed short shifter today and I decided to check my oil level and add just a tiny bit.

      I took of the oil cap and saw this



      MMmmmm, that looks like a nicely pulled shot of espresso

      I'm glad I found this thread, I just checked my oil and saw the same thing, at first, i thought I had a leaky head gasket (I have 2 head gaskets and a spacer)... seeing this thread was a relief... the temperature being in the teens explains why I saw the milky oil on my cap.


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