Hi all-

I have a 2001 F-150 with 5.4 V8. I've noticed over the past couple of years, that during the cold winter month's when I change oil, there is a build up of foam on the underside of the oil cap. I don't notice it in the summer, but just yesterday I noticed it. I'm not using any coolant; the fluid level stays constant. Just curious if this is normal or not. Thanks in advance.

-A. Chaos

 

its completely normal. its just a little bit of moisture. its mainly from taking short drives. there are a mess of threads with the same concern.

 

I have the same on my 2004 I just pull the oil cap off once a week and wipe it clean I also wad up a piece of paper towel and stick it down the tube on the valve cover to suck up the moisture thats in there

 

Thanks, fellas, really do appreciate the info!

 

no offense but... why?
IMO that would be a waste of time because its not like i can stop the moisture from getting in my engine.

 

You would be suprised how much gunk is on that paper towel when you pull it out I know i cannot stop the moisture but i try to keep it clean

 

I do the same thing I hate that it does that in the winter. I don't know if it helps anything or not, it still runs thru the PCV system, but you can get a in line separator to keep from going any further.

 

Thanks jbrew