Fix a broken crank?

Fix a broken crank?

Joined: September 15th, 2003, 2:11 am

March 16th, 2005, 3:17 am #1

I've got a Motorsport 4.5" crank that broke where the balancer is. It's missing the snout. Some say it can be fixed, the end bored, and a new snout pressed and welded in. Any ideas?
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RJP
Joined: January 11th, 2001, 3:47 am

March 16th, 2005, 5:26 pm #2

But you'll need a good machine shop to do the work. It has been done to diesel engine cranks for years, Early 855" Cummins engines with the taper nosed cranks had a problem with the snout breaking off and if the crank was in otherwise good condition the face of the crank would be machined off and drilled/tapped and a new snout would be made and installed then welded into place. If done right the repair was as strong if not stronger than the unbroken crank.

60 Starliner 460, 61 Starliner 427, 66 Galaxie 428, 67 Fairlane 427, 66 Fairlane 390, 69 F-250 390, 72 Lincoln 460 and 3 Ford powered Hotboats
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Joined: October 2nd, 2004, 5:05 am

March 16th, 2005, 6:00 pm #3

I've got a Motorsport 4.5" crank that broke where the balancer is. It's missing the snout. Some say it can be fixed, the end bored, and a new snout pressed and welded in. Any ideas?
we had the same thing happen years ago, did the same repair. It didn't last. Who said that they could repair it? If they are from Tenn. don't wast you time.
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Joined: April 23rd, 2002, 1:25 pm

March 17th, 2005, 3:50 am #4

a good "weld" on a cast crank. I suspect the repair would cost moer than a new crank. The old one will make a good mailbox support though.
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Joined: September 15th, 2003, 2:11 am

March 17th, 2005, 2:14 pm #5

This thing was given to me, so I figured if I spent a few bucks on it, it's cheaper than $1800.00 for a new one. But I don't know if I need this much cubes, or just buy a Scat 4.3 crank.
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Joined: July 11th, 2002, 11:26 pm

March 18th, 2005, 12:20 am #6

I've got a Motorsport 4.5" crank that broke where the balancer is. It's missing the snout. Some say it can be fixed, the end bored, and a new snout pressed and welded in. Any ideas?
After my snout joined the bird gang I looked over the rest of the crank and found stress fractures in the journal areas. If all is good and someone fixes it that KNOWS what is going on you will be O.K.
V/R
Mark Johnson

http://home.usaa.net/~johnson403
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