Was doing a tune-up, and yeah, this happened . . . (oil in spark plug holes)

[zchandran]

I just did my spark plugs and wires last weekend, and I get the same thing, oil in the spark plug wells - Every. Single. Time.

It's a leaking valve cover gasket which is not serious at all. I've tried using gasket putty even though it's not recommended, undertorqueing slightly, overtorqueing slightly, etc. I'm going to start doing the plugs and gasket at 25,000 miles instead of 40,000.

Your coolant leak sounds like a separate issue. Check thoroughly for external leaks first, maybe with UV dye.