F600 370” crankshaft

What are the chances one of these motors has a steel crank? Also, what’s the easiest way to determine if the crank is indeed forged?

Thanks,
Jon

460bronco wrote:What are the chances one of these motors has a steel crank?

The chances are slim-to-none.

I have read all kinds of online forum speculation as to which of these industrial engines had the forged crankshaft, such as 2-BBL vs 4-BBL engines, etc, but none of that speculation proved true for me--of the 370s I've torn down every single one of those engines had a cast crankshaft.

460bronco wrote:Also, what’s the easiest way to determine if the crank is indeed forged?

Thanks,
Jon

Unbutton the pan...

Thanks Paul! I don’t have enough experience of looking at different cranks and determining cast vs forged just by looking at them... I’ve had my hands on a factory cast 460 crank, a Scat cast 4.3” crank, and a Scat forged 4.5” crank. Never side by side though... what are some things I could look at to definitely say this 370” crank is cast????

Thanks again!
Jon

460bronco wrote:...what are some things I could look at to definitely say this 370” crank is cast????

Thanks again!
Jon

The flip-side answer to your question: I can tell you what to look for to identify a forged 429 crankshaft.

The part number will be forged into the counterweight:




The wide parting line of the forging dies will be about 1/2-inch wide and very evident (as opposed to the narrow seam of a casting mold):

Thanks again for the great info!

Bullet cams in olive branch can fix the snout and put any journal on it you want. they did a great job on mine.