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Old Nov 21, 2004 | 11:38 PM
  #1  
marcveinotte's Avatar
marcveinotte
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From: Westbank BC
400 crank ID

Pulled my NFG 400 apart... and well I couldn't tell for the life of me if it has a 400 crank in it. It was a "rebuilder" at some time..V covers say 400...most things i've taken apart lead me to believe 400... but not sure 100%.

Was looking for a casting number on the cank..but found zip?
where should I look? What # should I find?

Any help?
 
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Old Nov 22, 2004 | 01:31 AM
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f250rangerexplorer
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From: Yuba City, Ca
did you pull the pan cover off and look at the crank? also you can measure the stroke. 3.50 for 351" and 4.00 for 400".



 
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Old Nov 22, 2004 | 01:36 AM
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marcveinotte
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From: Westbank BC
Ya i've got it out

Yes I was looking at it out actually... and I would have measured the stroke had it not been seized ( wouldn't turn..rusty cylinders)...

Any way to tell now that it's out?
 
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Old Nov 22, 2004 | 01:56 AM
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hdgapeach
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From: Franklin, GA
Numbers are cast into the crankshaft. 5M, 5MA and 5MAB are 400 cranks. Casting code for 351M crank is 1K.
 
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Old Nov 22, 2004 | 03:48 AM
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From: Yuba City, Ca
are you gonna rebuild it?



 
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Old Nov 23, 2004 | 08:25 PM
  #6  
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marcveinotte
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From: Westbank BC
Hmmm

Well I was planning on it.. but as three cylinders would need to be sleeved..I would be better off finding another block to build and just use this crank.
( although I may have shot myself in the foot- kinda hit the rod bolts into the crank journals( 2) when trying to beat rusted pistions out enough to pull the crank...oops

Found an entire parts truck with running 351M today...plus lots of other goodies I can use...depends on what we can work out for it...we shall see.
 
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