Sunday, June 25th, 2006 AT 10:58 AM
I own a 1973 volkswagen beetle, the spark plug blew out of the engine while driving down the road. I bought a 14mm cylinder head rethreader kit, it comes with 4 different inserts, 3/8- 7/16 - 1/2 - 3/4. I don't know which one to use? Could you please tell me how to use to tool and what size? It also lacks a lot of power. Joan


