How To Weld Aluminum Valve Cover. The aluminum particles contained in the epoxy will adhere to the cracked part creating a permanent bond that will hold up in most situations. You can try to stop-drill the crack but then that is more area you hope to seal.
EOD is right about one thing though you will probably want someone who can do. I was wondering if jb welding a piece of aluminum under the valve cover would work. I then applied a fresh bead of Permatex The Right Stuff to the top and bottom of a fresh valve cover gasket and tightened the nuts on all the studs except the one screwed into the cracked boss.
Provided you have the right flux mix some with bottled drinking water to form a thick paste.
Use a tip size 2 larger then then for steel set a hot flame to tack slightly reducing. Wipe all tape residue glue oil grease paint etc with acetone. While I was welding the valve cover I was reminded of some basics for welding aluminum. You have no items in your shopping cart.