i was putting my o2 on my shortshots and got cross threaded i was an idiot an tried to take it out any ideas what i should do?

 

if the the threads aren't that buggered up, you can go buy a tap and chase the threads. otherwise prob will have to install a helicoil.

 

got a friend to grab a tap and die from work now its fixed thnx

 

just curious...do you know what size tap and die you used?

 

Its 18-1.5 A metric thread. Same as a spark plug. I have actual cut a few v-shaped cuts in an old sparkplug with a file and used it to clean up the threads. In a machinest world the tap is for cleaning up or threading the hole. A die(usually adjustable) is for cutting the male thread and a die-nut (not adjustable) is used mostly for cleaning up a male thread

 

looking at my 11's, id say they are smaller then 18 for sure, the head looks like 14mm or so. did they change to smaller ones?

 

You may be correct depending on year and I am going back 2 years. Looked out in my box for that plug and did not see it--think it came out of an old V-8 Ford van. I am sure that was the size for an 07 as I was putting a new take-off exhaust system off a 07 on my 04 a couple years ago when I cleaned out the thread. The sparkplug in my Harley's motor is 12MM (about .467). My Toyota truck sparkplug is 14MM (about .545). They have the seal washer. That Ford plug I used was a angle seat plug with no washer. 18MM is .708. I have the box the oxygen sensor plugs came in and it is marked 18-1.5. however I am like you. 18 MM seems pretty big. If it was not pouring rain here I would go out in shed and measure the darn plug. Owe an answer to another FP about transmission bubble oil also HA.

 

fixed this issue like 1 month ago =) thanks for the replies