Eagle broke crank

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Post  Lem Evans on January 11th 2013, 12:53 am

Wheelie58 wrote:
Lem Evans wrote:
Lem Evans wrote:Remove the rod and see if it broke at the fillet radius.

enough of the ......

1] dampner
2] low battery
3] hydraulic

Did it break at the fillet radius?
b
Lem,
Is that like the filet that the Texas Roadhouse has?
I got filled on one of those, but my crank was ok.

Having any fun in Ga. ?

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Post  Wheelie58 on January 11th 2013, 7:27 pm

Lem Evans wrote:
Wheelie58 wrote:
Lem Evans wrote:
Lem Evans wrote:Remove the rod and see if it broke at the fillet radius.

enough of the ......

1] dampner
2] low battery
3] hydraulic

Did it break at the fillet radius?
b
Lem,
Is that like the filet that the Texas Roadhouse has?
I got filled on one of those, but my crank was ok.

Having any fun in Ga. ?


Lem....it is always fun in Georgia...
Just ask Soup....
:-)
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Post  richter69 on January 11th 2013, 7:44 pm

I just took my truck to the store and fillet up with diesel...........
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Post  Wheelie58 on January 11th 2013, 8:01 pm

Cool! Now you can drive to Georgia to experience all of the BBF joy.
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Post  Wheelie58 on January 11th 2013, 8:02 pm

Atlanta....via Livermore....like the Uneasy Rider
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Post  soupbean on January 11th 2013, 10:20 pm

Eagle broke crank - Page 2 514brokecrank3

I reckon that would be fillet radius mignon... but why?


Last edited by soupbean on January 11th 2013, 10:38 pm; edited 1 time in total
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Post  schmitty on January 11th 2013, 10:22 pm

Wheelie58 wrote:Atlanta....via Livermore....like the Uneasy Rider
Gotta love the CDB. Laughing
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Post  QtrWarrior on January 11th 2013, 10:23 pm

Not enough material in the forging in that area..
That hole in the rod journal is just too **** big !!!
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Post  dfree383 on January 11th 2013, 10:40 pm

What's the bearings look like?

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Post  soupbean on January 11th 2013, 10:43 pm

Lem Evans wrote:Getting back to the broken crankshaft issue.........I've seen Bryant crankshafts break in the same place. The common themes are that the journals were turned .010" under. My first though was about the lose of surfice heat treatment. After talking to informed crankshaft professionals.....best answers were...local grinder srewed the radius up.

If soup's crankshaft broke at the radius:

1] Poorly done radius.
2] Flexing in that area.
3] Both.

What would cause flexing?
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Post  soupbean on January 11th 2013, 10:44 pm

dfree383 wrote:What's the bearings look like?


Not bad. A little wear but that could have come from after the breakage.
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Post  soupbean on January 11th 2013, 10:48 pm

soupbean wrote:
dfree383 wrote:What's the bearings look like?


Not bad. A little wear but that could have come from after the breakage.

But I'm no expert either. A few visible scratches and some dark spots but nothing that you can feel.
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Post  Lem Evans on January 12th 2013, 11:25 am

soupbean wrote:
Lem Evans wrote:Getting back to the broken crankshaft issue.........I've seen Bryant crankshafts break in the same place. The common themes are that the journals were turned .010" under. My first though was about the lose of surfice heat treatment. After talking to informed crankshaft professionals.....best answers were...local grinder srewed the radius up.

If soup's crankshaft broke at the radius:

1] Poorly done radius.
2] Flexing in that area.
3] Both.

What would cause flexing?

Not enough steel in the right place. Like mike said, the lightening hole in the throw could be too big. The radius could be too small or 'weird' in some way.

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