What should I know and be doing when Spark Plugs that look like this?

[Flyfish]

Very nice!
I appreciate the response and insight.
Thank you

Once you break apart the plug, you’ll see how simple it is to make.

 

[Toran]

Nice!

 

[Jimmy]

Or, save yourself time and just buy the tool for under $15: https://www.amazon.com/Proform-67400-Adapter-Female-Threads/dp/B002Q30X0G

 

[Toran]

Thanks Jimmy!

 

[ptschram]

Thanks for the reply to Everyone.

Say I had one of these gizmo, how much pressure should be air pressure should be applied?

How did you create that little gizmo anyway? Any welding etc? I have no welder so wondering.

Thanks

I use full shop air pressure-and have the correct tool to do so

 

[Flyfish]

I use full shop air pressure-and have the correct tool to do so

Yea, 10-15 psi is more of a cooling system test range but I would go with whatever PT recommends. You’re just trying to find where the big leak is, so you can always start low and increase the pressure until you find it.