Can someone please tell me the thread size for 505 series 1 cylinder head bolts ? I've forgotten.
Can't find my tap, and some people shudder at the thought of running a tap down into the block threads anyway.
So I'm going to create a chaser by buying a bolt and cutting slots in it with my angle grinder. Four slots ? And what to do about the slight burring ? Take it off with a hacksaw blade ?