1998 Ford F150 milky oil cap

1998 FORD F-150
250,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
WHOISLION
  • MEMBER
  • 2 POSTS
when i add oil to my vehicle it has milky oil in the oil cap know where else just oil cap does not seem to affect anything it just don't know why. it has probably done this for about 50000+ miles so shouldn't worry about it but just would like to know also replace water pump not to long ago. any info please thank you very much
Mar 13, 2010 at 5:49 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
When water mixes with oil, that happens, but if it is only on the cap, I don't think you have a head gasket problem unless you are adding coolant on a regular basis or there is white smoke coming from the exhaust. To me, it sounds like the PCV valve may be plugged. The PCV (positive crankcase ventilation) allows crank case pressure to be recirculated back through the intake. If it is plugged, then condensation can build and do that to the cap. I would try replacing it to see if it helps. It is a cheap part.

Joe
Mar 13, 2010 at 8:44 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle