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02kota
Dodge Dakota
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12/24/2004
16:04:06
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 Subject: milky oil foam
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It is now winter here in NW Indiana and very cold, and with this cold I have begun to see my oil filler tube get filled with a yellow milky foam. I have to clean it out almost everyday just to be safe. Dodge told me this is normal and ok, and will not harm the engine. Yeah like I believe them on that one. I tried to wrap some foam insulation around the tube and that didn't work. Does anyone have any ideas as to how to stop this problem. And is it really OK ? maybe I am a little uptight with my truck, but I heard to many wierd sludging problems to take any chances. I also use Mobil 1 5W-30 and a napa gold filter every 3,000 miles. oh and I have the baffle kit they give you if you complain so they can hide the problem from stupid people.
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hybrid
Dodge Dakota
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12/24/2004
16:36:16
|  RE: milky oil foam
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milky oil isn't good. From my experience milky oil is caused by a leaky headgasket, or blown allowing coolant to mix with oil. I would look into that further, i've never heard of oil becoming foamy and milky and being normal....IMO it's bad.
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chill
Dodge Dakota
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12/24/2004
17:43:32
| RE: milky oil foam
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It can happen when the temps get real low. The moisture that normaly builds in an engine is not burning off and you are finding it under the fill cap. Nothing to panic about.
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Big Ed
Dodge Dakota
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12/24/2004
20:00:27
|  RE: milky oil foam
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I concur with Chill, I have a 2000 SLT and a 02 Sport both with 4.7's and they both get that yellowish moisture build up under the fill cap. I would'nt worry unless you have really ugly oil during your oil changes.
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02Kota
Dodge Dakota
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12/24/2004
20:29:03
| RE: milky oil foam
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my oil changes are perfect and the oil looks clean as the day it went in. Thanks for the help does anyone know how to get rid of it though?
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Dra
Dodge Dakota
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12/24/2004
23:16:18
| RE: milky oil foam
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Only one way to stop that crap, Its the condensation build up becasue A)the filler is exposed to the air B)aluminum heads,magnesium valve covers and plastic filler tube all dissapate heat differently C)its a stupid design.
Get a spare valve cover drill for a oil cap and PCV valve remove the stock filler and block it off, no more milky white crap.
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hybrid
Dodge Dakota
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12/25/2004
02:22:26
| RE: milky oil foam
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02Kota,
The topic says "milky oil foam" then you mention the oil changes are fine??? I supose your oil isn't milky like you lead to believe in your post. Sorry for the misunderstanding....In that case forget about my reply about "milky oil foam" as I thought your oil was that way.
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daffydak
GenIII
12/25/2004
09:25:04
| RE: milky oil foam
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You mean like this.....
I'm not worried about it either, as my oil comes out clean, its just a little disconcerting... Maybe someone can manufacture an aluminum filler, that might absorb engine heat better and rectify the foam..... untill then, i guess I will live with it too.
Dan
MOPAR=More Power!!
00 CC Sport Plus 4.7L 4X4 Auto, 3:55 LSD
Flowmaster orig. 40 series (2 chamber) muffler, adjusted tps to .76V, ported TB, home brew intake setup w/K&N filter, more mods to come!!!
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brad
Dodge Dakota
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12/25/2004
10:42:11
| RE: milky oil foam
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emulsion accumulation will often occur on cooler engine surfaces, like the inside of the oil fill housing. Modern engine oils are designed to address the oil emulsion phenomenon. Oil emulsion accumulation is NORMAL and will NOT damage the engine
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ErasmusJones
Dodge Dakota
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12/25/2004
16:42:21
| RE: milky oil foam
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Well, the emulsified oil that so many of you don't care about is getting sucked from the oil filler through the PCV valve, then through a long tube where it enters the intake manifold.
Check out DaffyDak's pic above. That yellow spot on the left is the PCV valve.
Now what do you say?
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02Kota
Dodge Dakota
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12/25/2004
20:23:24
| RE: milky oil foam
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I may try to find a junk yard donor and drill the cover out, this stuff just like in the above pic still kinda concerns me as time goes on and mile build. Guess I will continue to check it a clean it out everyday just to have piece of mind. Does anyone know if drilling a new hole in the valve covers will work if so I may just give it a try.
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Joe X
Dodge Dakota
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12/26/2004
14:17:03
| RE: milky oil foam
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Notice in Daffydak's picture how the foam is concentrated on the side of the oil filler that is toward the fan. This lends credence to the idea that the relatively cool plastic oil filler is at least partially responsible for the accumulation of emulsified oil in that area.
Perhaps a shield of some sort can be fashioned to block the breeze from the fan and keep the oil filler warm enough to eliminate the foam?
Has anyone made such a shield that will share the dimensions and perhaps a picture of the device?
Erasmusjones's post about this foam getting to the intake manifold (and perhaps pooling in a low spot while is dries to a gooey mess) is a bit disconcerting. I'd rather not have to remove the intake manifold periodically to just to get the gunk out.
D-C engineers strike again!
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Walt
Dodge Dakota
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12/26/2004
16:19:49
| RE: milky oil foam
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If you make a lot of short trips in cold weather, even an engine in perfect condition will build up water in the crankcase. It's a normal product of combustion. You have to run at least 10 to 15 miles in very cold weather to get the oil hot enough to get rid of the moisture. So next time you go down to the 7/11 for a loaf of bread, take the long way. If you live near an interstate go out and run the balls off of it once in a while.
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Mark B
Dodge Dakota
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12/26/2004
17:49:01
|  RE: milky oil foam
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I was reading all the other postings and tought I might add my 2 cents. I'm thinking that you usually don't drive too far. You might consider warming your Dakota up before driving. It's not good on an engine to drive it a short distance without letting it fully warm up, expecially in the cold mid-west. If it doesn't warm up enough, you will also start rotting your exhaust system as well.
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NEW_SOL
Dodge Dakota
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12/28/2004
13:27:55
| RE: milky oil foam
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I don't know about how far you guys drive, and all your calculations on the enging cooling down properly, but every time I do an oil change. I clean any film/dust in the filler tube and cap and the caps seal and put a light film and new engine
oil and it keeps the "foam" out.
Just fyi, try it see if it works for you!
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Big Ed
Dodge Dakota
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12/28/2004
14:11:46
|  RE: milky oil foam
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Hey New Sol, just look at the pic on daffydaks posting, thats what were talking about and it does not occur on other vehichles that have the filler tube on the valve cover, ect. Yes, I'm sure we all clean it out at each oil change, we're just saying it shouldn't be there at all and are searching for ways to prevent it.
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NEW_SOL
Dodge Dakota
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12/28/2004
15:04:25
|  RE: milky oil foam
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sorry, what I meant to say was that I put a light film of new engine oil on the oil filler cap and
filler tube and it gives it a better seal to
prevent the foam build up. It works for me
and I have not seen foam for quite some time now.
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rpwilliams
Dodge Dakota
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1/01/2005
18:36:25
| RE: milky oil foam
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I have a brand new 2004 4.7L Dakota. At 3000 miles I changed the oil and used Redline Synthetic 5w-30 with the manufacturers oil filter, as I do in all my vehicles. I have been a mechanic for 5 years now. I went to tradeschool and college for it. I have an associates degree in CAT Heavy Equipment Tech. I have always been told FOAMY OIL IS BAD. At 6000 miles I started to take an oil sample from my engine to have it analyzed at work. To my EXTREME discomfort and dismay I found the evil foam in my oil fill tube. I had the sample analyzed and water was very prevelent in it(among other disturbing things). I have taken my truck to the dealership but unfortunately they are just as informed as we are. DC knows about the problem and they have modified the oil cap as well as inserted the ignorant baffle hide it from 4.7 owners(this problem first arose in Jeep Cherokees). The TSB stated that the oil emulsion is normal and is not to be worried about. If you do not plan on owning your 4.7 very long then I would not worry about it at all. But, if you are like myself and drive 30000 miles a year, you have a problem. This emulsion causes premature engine wear. It might be very slow but it happens. DC will be hearing from me.
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jeremiah2360
Dodge Dakota
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1/01/2005
22:08:58
| RE: milky oil foam
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rp I have the emulsion and have done oil analysis. My motor is wearing nicely with no water. What other "disturbing" things are you seeing?
03 qc 4.7 auto 4x4 45k
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chill
Dodge Dakota
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1/01/2005
23:42:13
| RE: milky oil foam
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rpw is a bit anal, it is a common occurance in many vehicles. Heat rises, warm moist air collects under the cap. It is not going to cause any undue wear on your engine.
If it bothers you that much, wipe it out every time you check your oil when you stop for a fill up.
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mopar4u
Dodge Dakota
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1/02/2005
09:24:02
| RE: milky oil foam
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Is that yellow crap "sludge"?
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