NAPA auto supply stores have a metric feeler gauge as well (NAPA 2274). I believe it cost me around $10.00

I re-used both my cam cover gasket and the cover sealing washers. Make sure the gasket surfaces are clean and dry before installing the cam cover gasket.

It does take a little patience to re-install the cover. I think it took me 3 to 4 trys before it fell into place. I have 700+ miles since the valve adj. and no leaks.

Jay