valve cover gaskets

I am trying to identify the part that has a little gray plug on it, which is peeking from behind the green plug in the picture. I unplugged it while replacing valve cover gaskets, and it was like peanut brittle under there, so I want to replace it, but have no clue what it is. this is by the...

Hey folks, brand new here! I have owned a 96 LC 6 cylinder 24 valve for about 7 years now. It is usually parked at our place in the hills here in AZ, and gets only about 1000 miles a year. I’ve noticed it uses about 1qt of oil a year. Upon inspection from above and underneath, there is oil...