u/Next-Lie-9454

Hi everyone, I’m making this post in hopes someone can help me figure out what’s going on with my 2004 4Runner v6.
Starting a a few months ago I started noticing (mostly when the engine is warm) I’ll start it and it will have a bit of a tremble for about 5-10 seconds then runs fine. No CEL comes on. I replaced the plugs and coils and also did a radiator head gasket check (it was fine) but it’s still happening. I’m hoping that it’s cause the Valve cover gaskets are leaking a generous amount of oil onto the plugs? Just wondering if anyone has any idea what’s happening. Praying it’s not the head gasket. Thank you!! P.s the picture shows what my socket looked like while pulling the plugs.