im pulling out my motor and parting it out... i forgot the freggin size on the arp nut. i tired a 14mm fits but wont grip...then i remember 12point socket...and will 14 didnt work...sooo i need anyoneeeee what size is the nut and what kind of socket is it?

 

1/2" 12 point socket
or 13mm 12 point
just retourqed mine last week

 

I use a 1/2" as it's a hair tighter than a 13mm.

 

i believe they're 12 point- 1/2" sockets but 13mm would work. my friend is pulling the head off his b16, so we also had to find out- good info..................................