What is the Crank Case Pulley Bolt Size?

[davidxk (David Langley)]

From the archives: 3/4"-16 UNF

Testing to see if 4.2L engine is seized

Yes, 1-5/16" socket. The thread is 3/4-16 UNF as is the rest of the XK engine except a few UNC where it is threaded into aluminum, and SU carbs if you have them are BSPP. If you can’t get in there with the socket, you may be able to find a place in the bell housing where you can get a pry bar in there and pry it on the starter ring gear. What country are you in?