460 numbers
460 numbers
Junior User
Joined: Oct 2005
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1979 & up 460 engines are external balance and the crank casting number may be 3Y or 3YA. These engineering revisions were usually on the leading or trailing edge of the third counterweight down from the snout...although the later external balance cranks were sometimes not marked.
These cranks are indentifiable by specific features that are found only on the 3Y cranks and not the earlier cranks, but these features are hard for me to describe on the internet. Another way to confirm is by placing the crank into a D9TE-AB block...if the OEM crank clears the cylinders, then it's a 3Y crank but if the OEM crank does not clear the D9TE-AB blocks cylinders, then it's an internal balance crankshaft.
Paul
These cranks are indentifiable by specific features that are found only on the 3Y cranks and not the earlier cranks, but these features are hard for me to describe on the internet. Another way to confirm is by placing the crank into a D9TE-AB block...if the OEM crank clears the cylinders, then it's a 3Y crank but if the OEM crank does not clear the D9TE-AB blocks cylinders, then it's an internal balance crankshaft.
Paul
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Posting Guru
Joined: Jan 2006
Posts: 1,101
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From: Malvern, Ohio
Alright, Thanks Paul.
So since the internally balanced cranks don't clear the block, does that mean that the .250 deeper cylinders on the D9TEs was added to the casting since the engines were changed to externally balanced?
So since the internally balanced cranks don't clear the block, does that mean that the .250 deeper cylinders on the D9TEs was added to the casting since the engines were changed to externally balanced?
Junior User
Joined: Oct 2005
Posts: 92
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Paul
