07 S4rs Testastretta coolant issue

[machining jim]

I noticed some coolant coming out of the rear head left head stud on my bike over the past couple of weeks. Might have lost like an ounce or so over the last 1000km. Not enough to lower the coolant level but enough to be concerning. I have a parts manual for my bike and I noticed that on the head stud there is an o-ring that sandwiches in between the head and the nut/washer. Does anyone know if there is supposed to be coolant getting into this area since there is an o-ring there or do I have bigger problems? Thanks in advance for any help on this!

[Ducnial]

 Sounds like a head gasket, I'd at least torque up the head to specs or better yet take it in. If its weeping coolant into the oil that's a real bad thing.