The Ford Barn

P.S. · 11-06-2013, 09:40 AM

Gentlemen,

A question for you.....

The 31 has a stock motor that runs absolutely wonderful. Smooth and powerful despite many miles on it. Have been using 10w-40 synthetic oil in it. A few days ago I checked the oil and saw it was just a little low so decided to add some. Upon removing the oil cap, I noticed a bright yellow "foam" inside the filler tube and on the bottom of the cap. It wouldn't come off with alcohol but it was very creamy and came off easily with a screwdriver. I ended up using a cleaner designed for removing flux from circuit boards to clean it out of the tube.

Looked inside engine and all looks normal. Oil on dipstick looks normal. Coolant level was only down very slightly which is normal. Car runs nice and cool. Asked two guys and no ideas. How about you guys? Any ideas?

11-06-2013, 09:40 AM	#1
P.S. Senior Member Join Date: Jul 2012 Location: Hazzard County Posts: 1,922	Yellow foam inside oil filler tube Gentlemen, A question for you..... The 31 has a stock motor that runs absolutely wonderful. Smooth and powerful despite many miles on it. Have been using 10w-40 synthetic oil in it. A few days ago I checked the oil and saw it was just a little low so decided to add some. Upon removing the oil cap, I noticed a bright yellow "foam" inside the filler tube and on the bottom of the cap. It wouldn't come off with alcohol but it was very creamy and came off easily with a screwdriver. I ended up using a cleaner designed for removing flux from circuit boards to clean it out of the tube. Looked inside engine and all looks normal. Oil on dipstick looks normal. Coolant level was only down very slightly which is normal. Car runs nice and cool. Asked two guys and no ideas. How about you guys? Any ideas?