Pistons

[sotis]

Tearing down a 345e made in 71(no idea what it came out of) anyway- the pistons have a number 2 on them next to the pin hole, any significance? Need pics?

 

[Robert Kenney]

A picture would not hurt. I have to assume you are talking about a number on the piston itself and not on the rod otherwise.

If the number is raised like it was cast in and in the piston pin recess area it is a die number designation. The manufacturer has multiple cavities to cast the slugs from which to finish machine the pistons out of so the number adds traceability.

 

[sotis]

Yes it's cast in the piston - heres a shot of the cast and the numbers stamped on the top. Thanks again

 

[Michael Mayben]

Yep...the stamped number on the crown is the IH part number. The "cast-in" number on the pin boss is the mold trace as Robert alluded to.