WRIST PIN FIT?

The reason some guys have to turn the rods blue to get the pin to slide in is because they refuse to pin fit the rod. You can’t leave that out.

If nothing else the pin ends shrink just from all the heat cycles. Some of these rods have been rebuilt more than once and every time the rod is heated to get the pin in, the hole shrinks when it cools.

You only need .0007-.0009 press fit on a .984 pin. Any more than that and you have to overheat the rod to get the pin hole big enough to get the pin in.

I’ve also seen too much press actually get loose. You can use too much press fit and cause the final clamp load to be less. Many miles or some detonation or both and the pin will get lose in the rod and it will slide over and dig nice troughs in the bore for you.