Cast crank or steel crank

[Griff]

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.

 

[GTX JOHN]

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.

 

[BeepBeepRR]

Harmonic balancers are different for cast and steel. One of them has a counterweight built into it.

Cast crank balancer.

Steel crank balancer.

 

[QuickBpBp]

Like shown above that thick ugly harmonic balancer will tell you...

 

[Griff]

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.

 

[Griff]

It’s got the steel crank balancer on it, but he don’t know what crank he put in it.

 

[Demonic]

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.

 

[6872n73]

See if you can sneak a borescope the drain pan oil hole

 

[Griff]

As well, thank you guys for all your help and comments.

 

[Griff]

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

 

[Griff]

See if you can sneak a borescope the drain pan oil hole

 

[Griff]

Thanks I’ll see if I can find one.

 

[Griff]

Are the crank flywheel mounting holes different on a cast vs steel crank?

 

[WileE]

 

[Griff]

View attachment 1868507

 

[Griff]

Great picture, thanks.

 

[493 Mike]

https://www.amazon.com/dp/B0BVMFYQN...89A4RRWLJ&ref_=list_c_wl_lv_ov_lig_dp_it&th=1
Mike

 

[icetech]

https://www.amazon.com/dp/B0BVMFYQN...89A4RRWLJ&ref_=list_c_wl_lv_ov_lig_dp_it&th=1
Mike

A scope has turned out to be one of the best tools i have ever bought.... Damn.. i want that vevor one... i got a cheaper one and it doesn't have those side cameras....

 

[oldkimmer]

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

 

[Griff]

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