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Crankshaft compatibility question

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Old Sep 23, 2022 | 08:50 PM
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Default Crankshaft compatibility question

Anyone know or have used a 2014+ 5.3 crankshaft in a gen 3 ? Is it possible or will it physically work.?

I have a 2001 5.3 that needs a crank and can get new late model one free.

GM part#

12685650

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Old Sep 23, 2022 | 10:14 PM
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It will drop right in, yes. Balancing the assembly might be in order however. Gen 3/4/5 cranks will interchange dimensionally.
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Old Sep 23, 2022 | 10:35 PM
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Originally Posted by Che70velle
It will drop right in, yes. Balancing the assembly might be in order however. Gen 3/4/5 cranks will interchange dimensionally.
I will be having the whole assembly balanced because I am using gen 5 rods and flat top pistons,but was wondering about flywheel and balancer fitting etc also?
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Old Sep 23, 2022 | 10:54 PM
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Don't forget the reluctor 58x vs 24x
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Old Sep 23, 2022 | 11:40 PM
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Originally Posted by Givememytoys
I will be having the whole assembly balanced because I am using gen 5 rods and flat top pistons,but was wondering about flywheel and balancer fitting etc also?
Pretty sure the LT stuff is all 8 bolt crank flange. I can’t confirm this, but it’s what I’ve read in the past. Not sure about the balancer, but I’ve seen guys put the new L8T 6.6 crank in LS blocks, so it should work. I’m not much help here…
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