That's what I thought. But I actually watched oil seeping up from the block at the threads. I put some silicone in the hole for the heck of it, and when I fired it up, I can actually see the oil pushing up the rtv out the top of the hole. I'll have to check to see if the hole is drilled/tapped all the way through from the previous owner, and if so, not sure what to do, maybe a stud with a gasket?