the later plastic covers are worse than the older steel ones, but i've always found 'em leak-prone. too many previous owners (and, erm, me) have overtightened them causing them to warp...
my final working solution was to get it all spotlessly oil-free, and use Permatex brand, "Right Stuff" gasket maker. as far as i know that stuff is unique. unlike silicones etc it's removable like a custom gasket.
my most recent engine was built using Right Stuff, replacing every single gasket except head, oil pump with the stuff. that was 2005, still not leaking. i'm sold.
Last edited by tom jennings; 01/06/16 01:56 AM.
