Did the the valve covers gaskets twice on my car not long ago at 100k due to oil leaking in the spark plug holes. And now I got oil coming out of 1 of the lower valve cover bolts . Never did it before but does it now. So the 1st replacement was a felpro so I changed it again with oem. Still doing it. Anything I can seal this bolt with with out removing the cover.Not gonna pull it apart a 3rd time. Also got some drippage comping from the filler neck o ring. Wished I knew at the time I woulda did it. Any cheap fixes I refuse to remove these valve covers again it was a pita.