Help..Broke off Knock sensor trying to remove.

[joe90]

In the process of replacing my KS, I broke it off leaving just the threads sticking out about 3/8". I wish it were a hex head like the other plug.
Anyone hear of this happening? Any Ideas?
Its really hard to get a wrench on it now. Thought of JB welding a socket on it over night even though it will be attached to threads and then try to remove it with my ratchet the next day.

 

[acewingman]

If it is sticking out enough you could put a groove in it and use a chisel as a screwdriver.