Hello! I feel like an idiot, but I just completed redoing my valve cover gaskets and found this brass spacer or insert left over in my parts container. I cannot for the life of me remember where it came from and am hoping that someone here recognizes it, or at least has done something similar so I don't feel so dumb?
Measurements from a cheap digital caliper are: OD 9.6mm, ID 5.5mm, Thickness 4mm


OD 9.6mm ID 5.5mm Height 4mm

 

Looks like this is what you’re looking for

 

Thanks, I really appreciate you trying to help me figure this out. That looked promising, but unfortunately that part appears to be the seal washer for the valve cover bolts (https://www.amayama.com/en/part/toyota/9021007001). I did check it against those bolts just in case, but the part I have is just slightly too small to fit those.

 

I'm not positive about your model but Toyota rubber v/c gaskets often have a brass insert in the gasket bolt holes to stop people from totally squishing the gasket when installing them.