SB Crankshaft Key Install

[YO7_A66]

The new crank in my 340/420 did not come with a crankshaft key for the harmonic balancer. So, I pulled the key out of my OE 340 crank and deburred/installed it, and the height of the key is too tall for my balancer. It appears to be too tall by apx .012-.018” along the key.

Is this a fit to suit (grind as needed) when installing the key, or should I pull it back out, clean out the keyway, and try to reinstall it?


Thanks!

 

[toolmanmike]

It sounds like the keyway wasn't cut deep enough. Call the crank company. They may have the proper key.

 

[YO7_A66]

Thank you TMM!

I just emailed K1 to see if they have one for this crank.

 

[Private Idaho]

Don't over think this. I would grind what you have to fit. I seriously doubt the crank maker has a special key to fit their crank.

 

[Michael Siple]

crank keys @ Mancini - used one of these in a K1 I have.

Crank Keys​

 

[YO7_A66]

Don't over think this. I would grind what you have to fit. I seriously doubt the crank maker has a special key to fit their crank.

Last night, I grabbed my file and with a little bit of effort, my harmonic balancer fits like it should.
Thank you all!