In Reply to: thread chasers 2 posted by dave#1 on January 27, 2016 at 07:45:04:
I have and have used a spark plug hole thread chaser. Saved my bacon and a head replacement.
I have thread files both std and metric
I recently bought a 5/8 18 bolt thread chaser because there was not enough room to get all the threads with a file. Very handy.