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none of them r 'unbalanced'. The one on the right in the second pic looks to have shed some weight over the older ones and using the same crank in the tsx/accord/crv says a lot. Also, they seem to have replaced all older models' cranks with the newer models' on the honda parts sites; price is great too. :)
 

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The newer cranks have the crank position sensor moved to the flywheel end. It is significantly larger in dia than the smaller K20A2 style.
 

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Discussion Starter · #7 ·
The newer cranks have the crank position sensor moved to the flywheel end. It is significantly larger in dia than the smaller K20A2 style.
the newer cranks like you said are using the cps on a flywheel end on the tsx and accord chassis... the CRV and element chassis still uses the same crank with the crank position sensor on crank pulley side.. these cranks will fit on older blocks :D
 

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the newer cranks like you said are using the cps on a flywheel end on the tsx and accord chassis... the CRV and element chassis still uses the same crank with the crank position sensor on crank pulley side.. these cranks will fit on older blocks :D
The main difference I see is the machining on the last counterweight to provide a mating surface for the pulse plate used by the newer crank position sensing systems.
 

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They also have a what appears to be more material on the counterweights were they pass the main journals. That looks to be a stronger design.
 

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Discussion Starter · #10 ·
On the older 99mm crank the main journal oil passages diameter was bigger than the one on the rod journals.

On the newer cranks it looks that they all have the same diameter so the main journal diameter decreased which means less oil but faster velocities.
 

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They also have a what appears to be more material on the counterweights were they pass the main journals. That looks to be a stronger design.
lol, but how often do you hear of the old cranks breaking?

On the older 99mm crank the main journal oil passages diameter was bigger than the one on the rod journals.

On the newer cranks it looks that they all have the same diameter so the main journal diameter decreased which means less oil but faster velocities.
Interesting. Is the oil pump any different? Net oil delivery will depend upon the pressure behind the hole and the diameter of the hole. If they decreased the size of the hole without changing the oil pressure, then yes, less oil will be delivered.
 

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Yes they are usually balanced by drilling the counterweights, and they are all balanced. The Kseries is ONLY internally balanced, no external balancing with the crank pulley or flywheel. But that balance is with stock components only, any upgraded rods or pistons will change the balance and require it to be rebalanced.
 

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Some engine designs utilize both internal and external balancing. The Kseries utilizes internal only.
 

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none of them r 'unbalanced'. The one on the right in the second pic looks to have shed some weight over the older ones and using the same crank in the tsx/accord/crv says a lot. Also, they seem to have replaced all older models' cranks with the newer models' on the honda parts sites; price is great too. :)
Starting to get a little confused without the pics being labelled? So the Crankshaft on the left is the NEW and the RIGHT is the OLDER shaft?
 
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