Oil cap

While I was trying to solve my idle - ISV problems, I removed oil cap to see if I have vacuum leak, and it looks like this:
http://us.f3.yahoofs.com/users/41b0e1b7z17770e36/5719/__sr_/73f4.jpg?phRivuBBW4VfwRBN
I changed oil one month ago - some 500 miles (Castrol GTX - mineral oil). All this time car is driven on short distances (2 - 2.5 miles) to work and back.
It never looked like this. I am going to drive it on a highway, for some 200 miles to see if it will go away. Is it safe? Is it only deposit cosed by short distance driving, or am I facing some major reprise?
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http://us.f3.yahoofs.com/users/41b0e1b7z17770e36/5719/__sr_/73f4.jpg?phRivuBBW4VfwRBN
The link cant be found. But...im curious!...so please fix it :o)
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Gio



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Nedavno Jesper Giovanni pise:
| The link can´t be found. | But...i´m curious!...so please fix it :o)
Sory, I just tried Yahoo's photos service. Try this link, and click on photo. Hope it works now :-)
http://photos.yahoo.com/perlica
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That's "mayonnaise" caused by water in the oil. Probably because of the very short trips your are making in cold weather. Buy yourself a bike . Rgds Alec
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Looks to me as if you have water getting into the oil. Head gasket ?? Not a good sign Regards Richard

http://us.f3.yahoofs.com/users/41b0e1b7z17770e36/5719/__sr_/73f4.jpg?phRivuBBW4VfwRBN
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Coolant, probably, but Ivan is running dual fuel (gasoline / LP ) so it could be a side effect of the LP. Seems to me that burning LP generates water as a by-product of combusion. This is nothing more than a guess to give Ivan another possibility.
Tony '91 100q
Richard Wall wrote:

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Nedavno Tony pise:
| Coolant, probably, but Ivan is running dual fuel (gasoline / LP ) so | it could be a side effect of the LP. Seems to me that burning LP | generates water as a by-product of combusion. This is nothing more | than a guess to give Ivan another possibility.
I am going to check coolant level. I was told that burning LPG generates water, and that exost silencers will have to be changed more often. But how would that wather find it's way into oil?
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My guess is short trips and motor not up to temperature long enough to release the water. The 200 mile ride might be overdoing it but a 20 to 50 mile one will tell the story. If it's gone after the ride then it's just the short trips. Skippy

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Nedavno Glenn Spence pise:
| My guess is short trips and motor not up to temperature long enough to | release the water. The 200 mile ride might be overdoing it but a 20 | to 50 mile one will tell the story. If it's gone after the ride then | it's just the short trips.
So should I clean cap before or just drive some 50 miles, and then see if it is gone?
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once its there its there to stay..........
a long drive will not shift the "mayonnaise"
you will have to physically remove it then do more miles per day to keep the mayonnaise away.
toy
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Looks to me that someone put lithium grease on the cap thread so it would come off easier. Suggest you wipe this crap off and drive the car for a day or so; see if it recurs. Also, look into the hole at the lubricant on the lifters; does it look just like the stuff on the cap?
Ken

uBBW4VfwRBN
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Nedavno KWS pise:
| Looks to me that someone put lithium grease on the cap thread so it | would come off easier. Suggest you wipe this crap off and drive the | car for a day or so; see if it recurs. Also, look into the hole at | the lubricant on the lifters; does it look just like the stuff on the | cap?
I looked and I couldn't see this white stuff nowhere else but on the cap. And there can be nothing on the cap because I changed oil recently myself, and car was not at any mechanic since.
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Strange. If coolant was getting into the oil, then I would expect to see this elsewhere. Perhaps there is some reason it would accumulate as it has in your image, but I don't understand how. Perhaps one explanation is that the lifters are hot enough to boil off any moisture and it condenses on the cap.
Per my initial posting, I suggest you wipe the stuff off and see if it is back in a day or so. Also, if coolant is getting into your oil, you should see evidence of it on the dipstick. What's happening there?
Ken

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Nedavno KWS pise:
| Also, if coolant is getting into your oil, you | should see evidence of it on the dipstick. What's happening there?
Nothing. Coolant level is OK, oil level did not rise up. Could be LPG related. Another thing. Around oil cap was an oily patch, so I bended flaps on oil cap to make it tighter fit to valve cover. Since oily patch is gone, maybe moist can not go out either, and that could cause creation of "mayonnaise"?
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I would say that if the oil in the crankcase isn't showing contamination and the coolant isn't leaking out that things may not be so bad. I am not a chemist, so the effects of LPG exhaust maybe leaking around valve stems causing mayonnaise isn't something I understand.
If you clean the stuff off, how soon does it build up again? Did you change the brand of oil to Castrol and then this happened? If so: try switching back. Maybe there is something in the formulation of Castrol that doesn't agree with your engine.
Maybe it's nothing to worry about, but it is good to be concerned. Good luck Yvan!
Ken

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If this is occurring in cold weather it can be due the PCV system building up water. This can ultimately cause oil to be pushed out through the weakest seal, ie Cam Shaft or Valve Gasket. This has happened to me twice in two weeks and what really needed to be done was to clean out the PCV system. It was recommended to call the following number and submit a complaint this is what might start a recall on this obvious design error. 800-822-2834. Good luck and dont forget to complain about it.
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wearyNedavno TAR pise:
| If this is occurring in cold weather it can be due the PCV system | building up water.
Water from where?
| This can ultimately cause oil to be pushed out | through the weakest seal, ie Cam Shaft or Valve Gasket. This has | happened to me twice in two weeks and what really needed to be done | was to clean out the PCV system.
How do you do that? Is crankcase breather hose part of PCV system? I recently changed that hose, but that hose has different diameter on one end than diameter on other end and I could not find hose like that. So I made a metal reducer that reduces diameter conically, and two constant diameter hoses on each end. Maybe it's clogged?
It's snowing here, and very cold, I will check that when snow melts.
And your problem happened twice in two weeks, and I still drive with no problems (that I can notice :-)
| It was recommended to call the | following number and submit a complaint this is what might start a | recall on this obvious design error.
My car is some 16 years old, I do not think that there might be any recall.
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