Hello and welcome, Super mechanic here. I will do my best to help you with your question.
****You have the hit happy face or a high rating for me to get paid for the answer.*****
If you need any more on it just let me know.
About your vehicle.
I have the instructions in a PDF format HERE
The "grommets" I would think are the spark plug tube seals?.I normally glue them to the top ot the tubes with gasket adhesive.
I like the instructions but the seals/grommets that go on the valve cover screw...is what I need help with. It looks like you can just spray silicone on the seal and slide it on the screw but i just want to be sure