y-man

I just recently tapped a 1/8" NPT fitting for a connector on my turbo manifold, but accidentally went too far. Now the fitting is not seating far enough before bottoming out. Is there a way to easily repair this? Do I have to drill it to 1/4" and use a face bushing to get the 1/8" fitting to fit?

narcszm

is it bottoming out on the narrow or wide end of the threads? if you have more thread left on your fitting / connector at the top and you think it'll tighten up before you run out of threads then I'd try removing some material from the bottom of the fitting / connector (shortening it, effectively). If you're colliding at the fat end of the NPT thread, then yeah, you'll have to step up to a 3/16" or 1/4" fitting.

y-man

I'm actually running out of threads on the fitting I'm installing. The fitting begins to contact the hole before I've threaded it in far enough to make it seal.

narcszm

i assume this is for some EGT or sensor fitting? Yeah you're going to need to make the hole bigger.