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Crankshaft Modification


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#1 Vladimir

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Posted 09 November 2019 - 12:33 PM

Is it necessary to modify LSJ crank while fitting ATI harmonic balancer?

I've being reading this thread https://www.cobaltss...71/#post7275934

 

 

 


Edited by Vladimir, 09 November 2019 - 12:33 PM.


#2 2-20

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Posted 16 November 2019 - 10:13 PM

He has lengthen the key groove to put a longer key.
He says the pulley is only engaged on the key by .25 inch . 2 inches agter modification.
This modification is not needed.
However, check which ATI balancer you install ( oem or underdrive) i think one of them need the machining of the oil pump cover.




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