1 of the spark plugs is stripped, and i went to the auto parts store and they asked me what size are my spark plugs? What size kit should I ask for?

 

How can anyone advise you the size of thread of the spark plug of your mystery motor. Is it even a car you are talking about? Could be a nitro model plane motor for all we know.

 

Wow you're right - sorry I have a 2005 Honda Civic ex 4 cylinder I think 1.7....

 

The parts people should in theory be able to direct you to the correct size kit based off your vehicle information that you just provided is here.

 

https://www.ebay.com/itm/14MM-Spark-...0AAOSwHMJYKqXT
Does it fit your car? I don't know.

 

14mm X 1.25

There are a few ways and kits to do the job. Personally I think the Time Sert method is unnecessary. Its expensive and can be done wrong.
When the threads stripped on my RSX about 6 years ago,I simply bought a thread repair kit from NAPA. It is inexpensive and very easy for a novice to do.

(The holes are very narrow. You need to find a reamer that will fit)

 

Yes. 14x1.25. The best way is an actual heli-coil. Sometimes those thread repair jobbies come out with the plug. I have seen bad repairs from those inserts. Heli-coil repair set is expensive (80$)+drillbit, and you need to know what you are doing, but IMHO it is the ONLY way i fix these for anyone.