Ha!! You assumed that I measure the very end.... Lol! You have to be away from the tip slightly to avoid working too hard, but still maintain full thread height.Uhh...Thanks!![]()
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Yes, measuring the tap is a sure-fire way to get you in the ballpark. But if you drill out just barely enough to shoe-horn the tap in there...you'll be cutting through more metal than necessary. Dulling the tap prematurely.
Ha!! You assumed that I measure the very end.... Lol! You have to be away from the tip slightly to avoid working too hard, but still maintain full thread height.
And I use good cutting oil with good taps, that helps a lot!
Yeah no crap.
As you can see, I don’t drill and taps much.

Well it’s a done deal. Used the HF tap set, some good cutting oil, and had to purchase a 9/16 bit, but it’s all together and sealed up.
I think I may look for a new t-stat housing.
The hole before the tap.
View attachment 262149
And I forgot to get a picture after I tapped it. But this is all finished up.
View attachment 262150

Next on the list is painting the valve covers.
Any preferences on a good high-temp paint?

I’m not much of a person that likes boring so maybe something fun.

Picture?I just did mine in VHT Cast Iron.... almost like a gunmetal. I like it