273: To Tap or not to Tap

Rag is good, also lots of grease in the hole to catch shavings.

Yup. I always pack the flutes of the tap with axle grease. It's like a magnet for metal shavings. I've even done spark plug holes in heads ON the engine and caught just about everything......at least nothing remained that hurt the engine. It's one of those old school tricks that flat out WORKS.