Questions to ask about a used crankshaft

[Kenny Blankenship]

I saw an ad for a guy who is parting a stroker 3.9. The car spun the #4 bearing at 70k miles. He took apart the engine but decided not to put the money into rebuilding it.

What questions do I need to ask if I want to consider buying the used crankshaft? It's a SCAT billet 3.9 that was used by Dinan.

Sorry if this is a stupid question...the deeper I get into an engine the more ignorant I am. ~_~

[Mark 88/M5 Houston]

I would want to know if that journal was damaged enought to need machining or been overheated to discoloration. Scat has a reputation of building fine crankshafts and you might give them a call as to what to look for and a ballpark estimate for evaluation and repairs. Journals can be welded and remachined, it would just depend on it's current condition.

I believe Rich's mechanic here in Houston shipped his crank to them (Scat) for some repairs.

[canyoncarver]

eric.....the journal can be built up via welding and then reground. if done make sure its rehardened/nitrided/etc.
also....make sure they check the thrust bearing surfaces........often overlooked...and leads to excessive end play............