I wasnt refering to a stock crank, there are a couple of 4" stroke W cranks in the market...

 

There would be no reason for a stock 400 crank to fail unless something was wrong to begin with.

 

Hello Paul!!
I have not visited FTE, or maybe I have not read all the threads.
I am very sorry to hear about your engine issues.
I have not seen a picture of the crankshaft you had, I don't know if I am late to the party here and just missed it somewhere.
I have not seen a crankshaft fail yet. I have seen spun bearings, severely grooved up journals, worn out thrusts. But those are faults of the crankshaft.
An OE crankshaft really will handle a lot.

 

You ask for a new crank and i found this:Ford 6.6 400 71-82 Crankshaft Crank Kit: eBay Motors (item 380116223666 end time Aug-01-10 07:09:15 PDT)

 

thanks for that, no chit. the dear wife has agreed to help post pics for me in 2-3 days. i still need u guys op. Mr Tim. will call when have intelligent move. honestly, no matter what i do, i would PREFER u be involved. all u guys. thanks. u r d BEST grin

 

What did the sister rod on that throw sustain for damage?I guess I wonder what the bearing in that rod looked like.Was there an oiling issue at that journal,or was it a single (isolated)rod bearing failure?And I guess like others here,what about the main feeding it.Anxious to see the pictures of the failure.And for the record,crankshafts can and do fail without the help of lube problems or bearing failures.Have seen many crankshafts fail in heavy engines due to bending or rotating bending fatigue.Usually attributed to someone straightening a bent crank.And they almost always break at the rod fillet behind the counterweight.Another spot they fail at is the oil feed hole on the rod journal.This engine should be an interesting failure analysis when it is determined what happened where.I also should have mentioned that any cast,forged,or foundered part can have internal flaws such as inclusions(pipe),voids,or irregular grains.

 

2 rods on a journal are fed from different mains

 

I understand that,and that was why I posed the question about the mains.

 

I own Graham Offroad. We use 400s because of their stroke. Cheap, stock bottom ends properly prepared. We use TMI parts and beat them to death in mud trucks, hill climbers, and rock crawlers. Never trashed a crank, but if we do, will buy a regrind from TMI. It's the only cost effective way to go.

 

To me it's a block problem from the oil gallery or lifter, just my 02.

 

To mush tolerance...

 

Hey all...will post pics tonight, finnaly got new parts

 

Ever manage to get those pictures?

the factory 400 cranks are stronger than the blocks . . . . i have picture proof lol.