Broken Exhaust Manifold Stud

[nyvoyager]

Photos

The stud was from the center of the exhaust manifold.
And just a general picture...about ready to set it on the engine beds

[Don Moyer]

Corroded stud

Thanks for the photos. I don't remember what you reported regarding the condition of the hole in the block, but it's not unusual for the threads in the block to survive at the depth where the threads on the stud are corroded away. I'm not sure about this, but it's entirely possible that the stud becomes the sacrificial anode and saves the threads in the block. Don

[nyvoyager]

Don, as well as i can tell the threads in the block are okay. My unscientific method was to chase them with a sharp awl to the end and then a tap to clean them out. They seem okay. Thanks for you help.