cracked rods

[blacksnapon]

OK folks, in NEW model engine technology, what is a cracked rod?

 

[Blue Goose]

What is a cracked rod? I guess a POS is not the answer you're looking for...confused

 

[6L PWR]

A rod out of a Duracrap or Cummapart that tried to race CodySchmoe or Me??

 

[Brian_B]

I don't know specifially what the term means, but sounds expensive to fix.

 

[mrfixit]

A "Cracked Rod" is actually a Powdered Metal Rod, or PMR. Also called "cracked" because the process that creates them is called "fracturing", creating rod and cap simultaneously.

 

[blacksnapon]

Very good! The rod and cap are one piece until they are separated along a scored mark. There is a pattern left in the "broken" edges that when re-assembled, keeps the cap from "walking" on the rod.

 

[mrfixit]

I had to get up to date on those because of the powerstrokes...

 

[mrxlh]

Very good! The rod and cap are one piece until they are separated along a scored mark. There is a pattern left in the "broken" edges that when re-assembled, keeps the cap from "walking" on the rod.

Wow learn something new everyday. I thought all forged rods were broached from 1 piece.

 

[mrfixit]

They may be, but the uniqueness lies in the cracking/fracturing that makes an irregular surface that mates securely, rather than cut and machined smoothe.