Steel Crank???

Posted By: Mopar1

Steel Crank??? - 12/17/08 05:15 PM

I'm going to look at a couple of 440 cranks later this week. Without the obvious hammer and ring tone check, How do I tell the diff between steel and cast? The dampers have been removed.

Posted By: MR_P_BODY

Re: Steel Crank??? - 12/17/08 05:23 PM

The casting line on the wrist pin throws will tell
you, if it has a wide line where it looks ground on
its a forged unit.... a thin line is a cast unit
wrist pin throws(first one and last one)

Posted By: fastmark

Re: Steel Crank??? - 12/17/08 05:53 PM

Some of the cast 440 cranks have the casting clock on them. They have sharper edges also.

Posted By: John_Kunkel

Re: Steel Crank??? - 12/17/08 08:14 PM

The tech archives have a good photo showing the difference between cast/forged.

http://www.moparts.org/Tech/Archive/motor/8.html

Ringing is not always a good test for forged/cast, if you hold a cast crank off the floor it will ring when struck.

Posted By: Scott Carl

Re: Steel Crank??? - 12/17/08 08:22 PM

Castings will also usually have raised numbers time/date etc info. Forgings with have any info stamped in.

Posted By: Mopar1

Re: Steel Crank??? - 12/17/08 10:23 PM

Thanks for the info guys!

Rick

Posted By: bboogieart

Re: Steel Crank??? - 12/17/08 10:53 PM

Quote:

The casting line on the wrist pin throws will tell
you, if it has a wide line where it looks ground on
its a forged unit.... a thin line is a cast unit
wrist pin throws(first one and last one)

times have changed, I remember when the wrist pin was on the piston end of the conecting rod.

Posted By: StealthWedge67

Re: Steel Crank??? - 12/18/08 04:22 PM

Quote:

Quote:

The casting line on the wrist pin throws will tell
you, if it has a wide line where it looks ground on
its a forged unit.... a thin line is a cast unit
wrist pin throws(first one and last one)

times have changed, I remember when the wrist pin was on the piston end of the conecting rod.

While I'm sure Mr. P-Body knows what he's talking about, I was thrown by that as well.... never heard of wrist-pins on a crank (???) "Wrist pin" is a term that is synomymos with "piston pin", isn't it?

Either way, I always have seen cast cranks as having very sharp, square edges, while forged cranks have more rounded edges.

Posted By: MR_P_BODY

Re: Steel Crank??? - 12/18/08 06:01 PM

Quote:

Quote:

Quote:

The casting line on the wrist pin throws will tell
you, if it has a wide line where it looks ground on
its a forged unit.... a thin line is a cast unit
wrist pin throws(first one and last one)

times have changed, I remember when the wrist pin was on the piston end of the conecting rod.

While I'm sure Mr. P-Body knows what he's talking about, I was thrown by that as well.... never heard of wrist-pins on a crank (???) "Wrist pin" is a term that is synomymos with "piston pin", isn't it?

Either way, I always have seen cast cranks as having very sharp, square edges, while forged cranks have more rounded edges.

Sorry about that... my error