Best sealing valve cover gaskets

InRogue said
Well I'm thinking maybe the winged bolts aren't tight enough, so I went and got some 1/4" 20 nuts, going to install them first and torque them down, the wing nuts will go over that.

should only snug the bolts with a 1/4 inch ratchet.
1/4 inch ratchet is all I use on 1/4 inch nuts and bolts.
Sometimes I just use a nut driver.