spark plug diameter

[euro_urs4]

need to tap my spark plug, machine shop messed up the top of the thread a little bit, for a urs4, anyone know what size tap i would need to get cant seem to get the measurement off of it thanks

[driftin jo]

need to tap my spark plug, machine shop messed up the top of the thread a little bit, for a urs4, anyone know what size tap i would need to get cant seem to get the measurement off of it thanks

14mm dia 1.25mm pitch

[euro_urs4]

14mm dia 1.25mm pitch

thanks you guys are the best

[UrS4boy]

Reverse Spark Plug Thread Chaser

What you want is THIS. You insert it into the head, through the spark plug hole and then expand it and "chase" the threads from the inside out. Should be available in the US.

[euro_urs4]

What you want is THIS. You insert it into the head, through the spark plug hole and then expand it and "chase" the threads from the inside out. Should be available in the US.

That's exactly what I bought thanks