• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Cast crank or steel crank

Griff

Well-Known Member
Local time
7:01 PM
Joined
Feb 12, 2023
Messages
113
Reaction score
64
Location
michigan
I was wondering how you can tell if an engine has a cast crank or steel crank, when already installed in a built 440?

The engine does not have original parts, and does not have hole drilled in back to accept a 4 speed.
 
The cast crank has a damper that is external balanced with
offset weight. The forged crank has a smooth balance without
an offset weight on it. Best way to tell in a complete assemble engine.
 
Harmonic balancers are different for cast and steel. One of them has a counterweight built into it.

Cast crank balancer.
s-l1600.jpg


Steel crank balancer.

s-l1600.jpg
 
Like shown above that thick ugly harmonic balancer will tell you...
 
Can a guy bolt on a steel harmonic balancer on a cast crank.
i want run a 4 speed, and need to know what fly wheel to put on.
 
It’s got the steel crank balancer on it, but he don’t know what crank he put in it.
 
They should match, usually you'll know it if they don't. Many cast cranks were not drilled, but the only way to really be sure is pull the pan.
 
As well, thank you guys for all your help and comments.
 
They should match, usually you'll know it if they don't. Many cast cranks were not drilled, but the only way to really be sure is pull the pan.
Ya, crank is not drilled
 
Thanks I’ll see if I can find one.
 
Are the crank flywheel mounting holes different on a cast vs steel crank?
 
No hole in the back is a cast crank. Take it apart. Get a steel crank and check the depth of the hole in the back of the crank and have everything balanced. U can use a pilot bearing from a 90s up truck. Kim
 
Last edited:
No hole in the back is a cast crank. Take it apart. Get a steel crank and check the depth of the hole in the back of the crank and have everything balanced. U can use a pilot bearing from a 90s up truck. Kim
I might have to consider that, thanks
 
Auto Transport Service
Back
Top