What is this white milky stuff under my oil cap?
You take the cap off of your valve cover to top off your oil or fill the crank case after an oil change and discover to your horror that there is some sort of white milky or creamy stuff coating the underside of the oil cap and down into the filler hole.
When do you open the oil cap do you see White Stuff?
The only time that we tend to open the oil cap is during a scheduled oil change. This often occurs every 5,000 to 10,000 miles, depending on the age, make, and model of our vehicles. Sometimes, we also top-off our engine oil in between oil changes. It is only during these times that we may notice a creamy, milky white stuff in the oil cap.
What happens when you take off the oil cap?
So, you take the oil cap off of your valve cover to top off your oil. You find a milky creamy white stuff, coating the underside of the oil cap and down into the filler hole. So, what is this white stuff and what is it doing in my oil system?
Why is there frothy stuff under my oil cap?
Compare this to driving 60 MPH for at least 30 minutes on the highway and you will not have any issues with a frothy buildup under the oil cap. It is also possible that you have a worn-out or damaged oil cap seal. If there is a break in the integrity of the cap’s seal, then it is possible for moisture to enter.
What to do about White Stuff under the oil cap?
When this happens, you are increasing the risk of forming a frothy sludge under the oil cap. If the engine bay requires cleaning, it is best to use low-pressure water spray. It is also important to avoid spraying engine seals such as those found in the valve cover.
Why does my oil cap turn milky white?
Sometimes you might just end up topping up your engine oil between oil changes. It is during such times that you might notice that your oil cap has a milky, creamy white stuff. A weather change from warm; moist weather to cold weather or repeated frost on the vehicle and frequent high dew points; can create moisture to form in the crankcase.
Why does my car have White Stuff under the oil cap?
The same is true if you’re taking good care not to introduce moisture into the engine during washing. In such cases, there is only one possible explanation why there is a buildup of white frothy sludge under the oil cap: you may already have a blown head gasket.
So, you take the oil cap off of your valve cover to top off your oil. You find a milky creamy white stuff, coating the underside of the oil cap and down into the filler hole. So, what is this white stuff and what is it doing in my oil system?
Why is the oil on my car Milky?
My car has a manual transmission. The discoloration likely represents the effects of entrained moisture in the oil on the cap surface. There can normally be a certain amount of condensation in an engine, for example as weather conditions change or if the engine sits for a while unused.
Why does my car have water under the oil cap?
High-pressure water spray can force water through the different connections in the car’s engine. This can include the area under the oil cap. It is also possible that water can enter through the air filter housing, the power steering cap, and the engine oil dipstick.
You take the cap off of your valve cover to top off your oil or fill the crank case after an oil change and discover to your horror that there is some sort of white milky or creamy stuff coating the underside of the oil cap and down into the filler hole.
The only time that we tend to open the oil cap is during a scheduled oil change. This often occurs every 5,000 to 10,000 miles, depending on the age, make, and model of our vehicles. Sometimes, we also top-off our engine oil in between oil changes. It is only during these times that we may notice a creamy, milky white stuff in the oil cap.
My car has a manual transmission. The discoloration likely represents the effects of entrained moisture in the oil on the cap surface. There can normally be a certain amount of condensation in an engine, for example as weather conditions change or if the engine sits for a while unused.