Pics/questions about a busted 6.2L crank

[kennyw]

Here is the damage... Crank is snapped in half, right behind the #3 bearing journal. In front of #7 rod. I had a brand new timing set and harmonic balancer and a good used flywheel for a 6.2L on the motor... wondering if these motors are known for snapping cranks even with everything else in good shape? Or should I be looking for other problems somewhere?

I'm gonna have to tear it down now to remove the crank anyway so I'm thinking a cheap rebuild, new gaskets and bearings is in order just because its torn down. Don't think I need to redo the rings as it didn't use oil and had good compression already. Started without hesitation, even in cold weather (manual glowplug setup as well).

 

[camiswelding]

you want mine...I know you do

 

[arveetek]

Yes, the 6.2L does have a minor reputation for snapping cranks. Usually it tears up the block in the process, though.

I'd really, really inspect the block for cracks in the block, especially the main web area.

Could be the damage was done to the crank before the balancer was replaced.

Casey