AMA Supersport Racer
Join Date: Apr 2014
Location: Annapolis Area
Thanked 172 Times in 151 Posts
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Throwing a rod is usually an aftermath of some other issue. Did you overrev? Ran on low oil/oil pressure? Was the engine getting toasty? There's a myriad of other reasons the pistons go. Usually with something that violent, you'd be looking at damaged crank, journal bearings, possibly valve damage, cylinder damage, cooling/oil passage punctures, and metallic bits getting places where they don't belong causing a cascade of other issues.
Unless you're comfortable, have the time and willing to put in the effort to gut the block and piece out everything that's toast, you are better off swapping the whole engine.
So in sum, thrown rod == complete tear down and rebuild or get another.