broken crark shaft

[fobrnno]

driving home last friday night and getting off at my cut off all of a sudden some one open a can of marbles in my motor i limps it home and just got the motor out and found a broken crank shaft.
now what would cause it to brake where it did and what year of crank will fit in my motor
my motor is from a 1994 e 350 7.3 non turbo

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[gonecrazyi]

They are all the same as far as I know. If you were closer I have a few spares, but shipping would kill all the way to where you are at.

 

[towcat]

All IDI cranks have the same casting number.
do avoid the oem turbo motor crank just in case though.
you're the fourth person in a one year period to have reported this problem.
does the motor look like it has been rebuilt in the past?

 

[typ4]

dang, what TC said, that is a lot of broken cranks recently.

 

[FordGuy100]

Is that one main bolt supposed to look like that? Just curious.

 

[TwoTone IDI]

Is that one main bolt supposed to look like that? Just curious.

thats a stud for the pickup tube.

 

[towtruckdave]

That is the bolt the oil pickup hangs from.

You may need a new block. The broken crank may have been caused by a out of square block. On top of that, the crank likely distorted your block when it parted.

 

[icanfixall]

What shape is your harmonic balancer in??? Can you pull some mains or rod bearings and see if this was a 10,20 or 30 ground undersize crank... Sometimes the grinders don't chamfer the edges correctly and it causes stress cracks....

 

[BigRigTech]

That is an odd break, normally they snap off clean behind a main cap. Everything comes in bunches - I saw this a lot at Freightliner....This week clutches, next week rear diffs and the week after that could be turbo's....Wierd how that works huh....

 

[towtruckdave]

That is an odd break, normally they snap off clean behind a main cap. Everything comes in bunches - I saw this a lot at Freightliner....This week clutches, next week rear diffs and the week after that could be turbo's....Wierd how that works huh....

No doubt. I remember when I used to do alot of shop/private tows, there would be days when a few cars would all break down in the same intersection a few hours apart.

 

[BigRigTech]

It's the Bermuda triangle effect........That or they had Toyotaitis.....

 

[towtruckdave]

I used to think it was a magnetic field off a powerline or something. Or maybe UFOs? ;p

 

[BigRigTech]

It was probably caused by a really ****** repair shop close by...

 

[towtruckdave]

 

[Goofyexponent]

That is pretty wild! It broke just like that eh? No odd noises, drop in oil pressure or anything?