Need help figuring out why in my 2011 5.3 Tahoe spark plug #7 keeps getting oil on thread

[Javi559]

Spark plug #7 keeps getting oil on the thread side. from what I’ve learned on all of all the other cars it would be the valve gasket, but I’ve learned that doesn’t exist on the Chevys 5.3 anybody have any information on what I could look into or do..

 

[Geotrash]

Spark plug #7 keeps getting oil on the thread side. from what I’ve learned on all of all the other cars it would be the valve gasket, but I’ve learned that doesn’t exist on the Chevys 5.3 anybody have any information on what I could look into or do..

There are valve stem seals and there is a valve cover gasket. Hope that helps.

 

[Fless]

Is this oil outside of the head, or inside the combustion chamber? Can you post a pic of that spark plug?