[jddmech7]

hello all just got into moding a 93 mustang and got a ranger header but the o2 sensor was wielded off so i need to either tap it or helicoil it but was wondering the thread count pitch size any help would be great

[mg man 75]

Welcome. Don't know but can take sensor with you to hardware store and fiqure it out that way.

[b_chandler]

You won't find this particular thread pitch at a hardware store.


I believe they use 14mm spark plug threads for O2 sensors.

[mg man 75]

If 14 mm threads. Do like a freind of mine does. Take a bolt cut groove in it from tip of bolt toward the heads. In other words make a notch like a tap. He has done this numerous times to chase a thread. If 14mm sparkplug take old plug and do it to it.

[jddmech7]

went to ace and found it be 3/4by16 or atleast the die threads on nicely but they dont have a tap that size will have to check at work I hope we have one there. thanks for all your help...