It appears that these EA82 heads have a drain port (?), maybe a 12mm hole in each head. I blew air up in them, and they definitely go to the cooling system.
So . . . I've sold my spare heads, and I've sent the other set back to AHR as cores for these rebuilt ones. I've got no manuals that cover this, and no other EA82s laying around to look at for an example.
Just what goes in these holes? Bolts with seal washer under head? Pipe plugs?
