I've read multiple threads on diagnosing the creamy-colored-oil issues, but I don't feel like those answers fully pertain to my problem. Most threads indicated that one day the car started acting funny, they checked their oil and - lo and behold - they saw coffee. I too saw this and took steps that I thought would fix the problem, but my first test drive after "fixing" it, I pulled over after not even 2 minutes of driving to discover coffee on my dipstick again! 2 MINUTES!
I have a 2004 Jeep Cherokee 4.0, and upon discovering this contamination of my oil the first time I did the following:
- Drained all of my oil.
- Took off and cleaned all components from the cylinder head up.
- Installed new head gasket (although I couldn't see any blown or heavily worn areas)
- Reused the valve cover gasket but applied copper gasket sealer.
- Inspected my oil pan after refilling my cooling system to the top ( to check for any water )
- Replaced oil filter and added new oil.
- Took it for a spin.
Like I said, not even a two minute drive and I discover creamy colored oil yet again. No performance issues, just cream. So it leads me to think that a water passage might have somehow leaked into an oil galley (is that possible?) in the block or head...also I noticed my valve cover wasn't properly tightened (I could hear a whistling noise while driving) and I tightened it promptly.
Could an air leak into the valve cover produce oil in that color?