I thought of that, and so I "practiced" on one of the other inserts. I then tried to screw the insert into the newly tapped threads in the head and it didn't go in easily (the "unground" insert go in quite easily). I've made a couple of trips to hardware stores looking for a 16mm nut that I could "clean up" the threws on the ground insert, but couldn't find one.

After going through all this mess to fix the head, I sure don't want to mess up the threads I just tapped.

I'm not sure what I'm going to do, but whatever it is, I'm going to think about it for quite a while.

thanks

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92 300E - 116K miles - Sold
77 Euro 350SL - 67k miles
94 Explorer 147k miles
2009 Hyundai Genesis - 65k miles