Yep, after hand tightening with the fuel hose, it's almost at 15 lbs/ft already.

 

Tapered seat plugs in an aluminium head, that’s all that’s required!

 

Shop mechanics tend to use air impact tools for all jobs. They probably save 5 minutes a day not reaching for tools, and they don't get dirt on their gloves.

 

I think whoever installed the old sparks plugs forgot to tighten them cause two of the other plugs were only finger tight. The one that blew out might have just backed out till it didn't have any hold left. Just guessing. Blew the stem off the coilpack too.. Might not have made a good movie script but sure save me a lot of work. Makes it a five star on my end.