Cause and Fix for milky residue on oil cap in cold climates
#1
Cause and Fix for milky residue on oil cap in cold climates
I posted this in The Car lounge yesterday and honda-tech has been awesome to me so I'm sharing my post here
/sand in vagina
Winter is here and I've noticed last winter on a bunch of forums this type of thread pops up at least once a week on pretty much all engine specific forums.
During the winter, it gets so cold that the oil vapors in your crankcase and condensates onto your oil cap. Most people see this when they go to change their oil or just take of the cap and panic thinking. It's nothing more than oil/water emulsion.
What it is:
What you are seeing is nothing more but oil sludge. It is the result of hot oil fumes condensing at the oil breather area near the oil cap and interacting with moisture from the air, mostly in cold weather.. The white-yellowish goo you see is oil condensation mixed with water vapors.
What causes it:
This yellow sludge, goo gunk, whatever you wanna call it, formes because:
1. You drove the engine frequently on short trips and it could not heat up long enough to burn off the water vapors.
2. The oil seals on the oil breather and the oil cap are shot (rarely).
3. You did not tighen the oil cap all the way
4. It's cold outside
How to fix/avoid this:
1. Replace both oil gaskets in the oil breather. One sits between the oil breather and the valve cover. The second gasket you must replace is the one on the oil cap. When these gaskets get heated, the rubber/silicone often burns and shrinks thus allowing for moist air to enter and interact with oil fumes
2. Avoid short trips
3. Switch to synthetic oil. Synthetics have better detergent qualities and will not sludge as much as the conventional motor oil
Hope this makes sense and
cliffnotes:
Milky residue is to be expected on your oil cap in cold weather. It is normal and NO FIX IS NEEDED because it is NOT a problem.
go on and be smart and safe
now with some great words
link here
http://forums.vwvortex.com/zerothread?id=4687094
/sand in vagina
Winter is here and I've noticed last winter on a bunch of forums this type of thread pops up at least once a week on pretty much all engine specific forums.
During the winter, it gets so cold that the oil vapors in your crankcase and condensates onto your oil cap. Most people see this when they go to change their oil or just take of the cap and panic thinking. It's nothing more than oil/water emulsion.
What it is:
What you are seeing is nothing more but oil sludge. It is the result of hot oil fumes condensing at the oil breather area near the oil cap and interacting with moisture from the air, mostly in cold weather.. The white-yellowish goo you see is oil condensation mixed with water vapors.
What causes it:
This yellow sludge, goo gunk, whatever you wanna call it, formes because:
1. You drove the engine frequently on short trips and it could not heat up long enough to burn off the water vapors.
2. The oil seals on the oil breather and the oil cap are shot (rarely).
3. You did not tighen the oil cap all the way
4. It's cold outside
How to fix/avoid this:
1. Replace both oil gaskets in the oil breather. One sits between the oil breather and the valve cover. The second gasket you must replace is the one on the oil cap. When these gaskets get heated, the rubber/silicone often burns and shrinks thus allowing for moist air to enter and interact with oil fumes
2. Avoid short trips
3. Switch to synthetic oil. Synthetics have better detergent qualities and will not sludge as much as the conventional motor oil
Hope this makes sense and
cliffnotes:
Milky residue is to be expected on your oil cap in cold weather. It is normal and NO FIX IS NEEDED because it is NOT a problem.
go on and be smart and safe
now with some great words
Originally Posted by Red Green
If the women don't find you handsome, they should at least find you handy.
link here
http://forums.vwvortex.com/zerothread?id=4687094
#3
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Re: Cause and Fix for milky residue on oil cap in cold climates
blown head gasket hands down. dotn drive this car unless you want a spun bearing or catostrofic failiure. it may run fine for a while but its only causing invisible damage until one day soon . **** the bed. seriously blow head gasket. its the coolant mixing with your oil.
#4
Re: Cause and Fix for milky residue on oil cap in cold climates
blown head gasket hands down. dotn drive this car unless you want a spun bearing or catostrofic failiure. it may run fine for a while but its only causing invisible damage until one day soon . **** the bed. seriously blow head gasket. its the coolant mixing with your oil.
did you read the post? did you click the thread I linked to?
I acknowledge the fact that there is the small off chance it could be a headgasket but in the conditions I listed it is over 99% of the time just oil/water emulsion
1) winter
2) short distance driving
#6
318 Curves, 11 miles
Re: Cause and Fix for milky residue on oil cap in cold climates
A lot of milky crap is symptom of a headgasket, but a little bit is normal as OP said.
#7
Honda-Tech Member
Re: Cause and Fix for milky residue on oil cap in cold climates
blown head gasket hands down. dotn drive this car unless you want a spun bearing or catostrofic failiure. it may run fine for a while but its only causing invisible damage until one day soon . **** the bed. seriously blow head gasket. its the coolant mixing with your oil.
I agree with the other posters that while it COULD be a symptom of a blown head gasket, it can more likely just be from the cold weather (as stated by the OP). You obviously would typically have other symptoms that go along with the failed HG that you could check.
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#8
Re: Cause and Fix for milky residue on oil cap in cold climates
Jumping the gun a little bit aren't we?
I agree with the other posters that while it COULD be a symptom of a blown head gasket, it can more likely just be from the cold weather (as stated by the OP). You obviously would typically have other symptoms that go along with the failed HG that you could check.
I agree with the other posters that while it COULD be a symptom of a blown head gasket, it can more likely just be from the cold weather (as stated by the OP). You obviously would typically have other symptoms that go along with the failed HG that you could check.
also I found this to be a common issue on other cars but it did seem like the VAG are more likely to do so, especially the VR6 and Mk1, mk2, mk3, mk4 ubiquitous 2.0L (non-turbo)
#10
Honda-Tech Member
Re: Cause and Fix for milky residue on oil cap in cold climates
see this all the time on all sorts of vehicles.
its normal as the op stated.
most the time when i see it, its people who drive their car 1 min to the store, then 1 min home, then 1 min to work, then 1 min back home.
short trips are the main cause
good informative post
its normal as the op stated.
most the time when i see it, its people who drive their car 1 min to the store, then 1 min home, then 1 min to work, then 1 min back home.
short trips are the main cause
good informative post
#11
Crazy Honda Guy
Re: Cause and Fix for milky residue on oil cap in cold climates
Hmmm, i'm 36 years old, owned 49 cars, 27 of them being Honda/Acura models, and not once had this happen to even one of my cars ever!!!! Even with winter beater i use for short trip to/from.
It's when i see posts like this for cars like VW's that i will never buy one, as well as them being known for many small electrical gremlins
It's when i see posts like this for cars like VW's that i will never buy one, as well as them being known for many small electrical gremlins
#12
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Re: Cause and Fix for milky residue on oil cap in cold climates
Hmmm, i'm 36 years old, owned 49 cars, 27 of them being Honda/Acura models, and not once had this happen to even one of my cars ever!!!! Even with winter beater i use for short trip to/from.
It's when i see posts like this for cars like VW's that i will never buy one, as well as them being known for many small electrical gremlins
It's when i see posts like this for cars like VW's that i will never buy one, as well as them being known for many small electrical gremlins
#13
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Re: Cause and Fix for milky residue on oil cap in cold climates
i was just about to make a thread lol. I have a built gsr in my hatch and it is a fresh setup with around 9000 miles. i have noticed lately that the oilcap gets a tad milky and the hose from the valvecover to the intake has a tas of the same in it.
Now i dont feel as worried.
I do only drive my car 10 mins to work in the morning and 10 mins home in the afternoon. Thats about all the driving i do with this car.
Now i dont feel as worried.
I do only drive my car 10 mins to work in the morning and 10 mins home in the afternoon. Thats about all the driving i do with this car.
#14
318 Curves, 11 miles
Re: Cause and Fix for milky residue on oil cap in cold climates
yeah, I wouldn't say you should see a ton... When I pulled the valve cover off my d16y8 at 187K miles, I noticed a little bit of crap on the inside of the VC, but none on the valvetrain.
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