new to mb question on 603

[knighthawk]

Howdy I have ben lurking for a while and want to thank everybody for the great help and info. Hope to be able to return the favor. I own and operate a heavy duty truck shop for 27 years and have rebuilt hundreds of diesel engines but new to mb. my 3.5 is running great.but? Are there any replacement rods that I can install now and head off the problem? Thanks again.