Reply to "De Tomaso valve cover logo"

I bond them on with a mastic adhesive. The brand I use is a UK product called U-pol Tiger Seal. (There are many similar products out there just ask any body shop)
This is super strong and copes with the heat no problem. It dries like rubber so will never crack. The most important thing is to make sure the paint on the valve cover has maximum adhesion to the steel. Before you paint the cover, place the DT plaque on the cover and put masking tape around it. Then rough up the surface of the steel in this area to insure a good mechanical bond for the paint. Do the same on the back of the plaque. I dont paint the back of the plaque, just around the sides and maybe 1/4" around the edge of the underside.

Also be aware there is a paint window for maximum adhesion between top coat and primer, this is very important.

If I was using fasteners I would peen the end of the bolt to make sure it could never undo. I think it would be hard to stop oil leaks using fasteners because you would not be able to seal it from the inside for fear of the lump of sealant falling off and blocking an oil way.

Johnny