How do i get the knock module off ?

The drain plug is in there so tight i dont want to break it off like i did on the y pipes. Any advice

 

The knock module just screws into the block. I believe it is a 7/8 wrench. I just did mine yesterday. The drain plus is the same way. Just screws in. I doubt you will break it, they are very stout, but they do cease into the block. Put your butt muscles into it, and it will come out. Use a little anti sieze when you put them both back in.

Q