Stop in for a cup of coffee

71GSSDemon said
I immediately thought you cant do that and figured they would use new ones but you could definitely see the tooth slide marks on them when they went back in.

Miniature example of what happens when there are nicks, cuts, or pits and the metal is twisted back and forth.
The stresses in the reduced section are high, and highest where there is an abrupt discontinuity.

engine shop thought these would be OK. Wrong.

This one didn't make the first thousand miles.