mjchin

I noticed a leak in with my valve covers and was going to replace them. Upon inspection, I came across a hole that appeared to be filled with some sealant (I purchased the vehicle pre-owned recently). I'm not sure what it is but suspect it might be where a bolt was.

See attached Image_2 for a picture of the filled in spot. See attached Image_1 for what I suspect is an example of the bolt.

My questions:
In Image_2, what goes in here? If its a bolt, what size?
In Image_1, is this the bolt that goes in?


Does someone have a parts list and / or a DIY guide for replacing the valve covers?
Is there an additional gasket below the oil filler neck that I should be aware of?
Can someone share with me a diagram, or point me to a diagram source of this area?

Thanks in advance!