Author Topic: Chevy BB cranksahft cast dates?  (Read 2427 times)

rally

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Chevy BB cranksahft cast dates?
« on: March 08, 2012, 12:08:08 PM »
Guys do you know if Chevy cast dates on there crankshafts at the foundry? I have a BB crank and it looks like a raised letter 69 near the top of the front throw? Did they do this?

bcmiller

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Re: Chevy BB cranksahft cast dates?
« Reply #1 on: March 14, 2012, 06:29:10 PM »
I don't know.  All I ever look for is the casting number.  A date on a crankshaft is not important to me.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

rally

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Re: Chevy BB cranksahft cast dates?
« Reply #2 on: March 18, 2012, 02:21:09 AM »
but important to me fella.

bcmiller

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Re: Chevy BB cranksahft cast dates?
« Reply #3 on: March 19, 2012, 12:53:37 AM »
Why?  When is the last time you had to pull the pan at a show to have them verify the crankshaft was correctly dated for your car?

It may have a casting date if it is a cast crank.  See this link for where to look.
http://www.chevytech.com/2c50o6.html

Some may have a forging date, but I am not sure on that.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

JohnZ

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Re: Chevy BB cranksahft cast dates?
« Reply #4 on: March 19, 2012, 04:49:04 PM »
Some may have a forging date, but I am not sure on that.

Forgings weren't dated, although many had a code adjacent to the forging number that identified the set of forging dies used to make the part.
'69 Z/28
Fathom Green
CRG

bcmiller

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Re: Chevy BB cranksahft cast dates?
« Reply #5 on: March 19, 2012, 09:19:54 PM »
Thanks for clarifying that John.
Bryon / 1968 Camaro SS 396 - now 468 ci, M21, 12 bolt
Looking for 68 Camaro with body number NOR 181016

z10kl

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Re: Chevy BB cranksahft cast dates?
« Reply #6 on: March 24, 2012, 10:19:58 PM »
This looks like a date to me.

JohnZ

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Re: Chevy BB cranksahft cast dates?
« Reply #7 on: March 24, 2012, 11:41:45 PM »
This looks like a date to me.

Yes, it is - that's a cast crank.
'69 Z/28
Fathom Green
CRG

z10kl

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Re: Chevy BB cranksahft cast dates?
« Reply #8 on: March 25, 2012, 12:13:37 AM »
My bad. I thought he was asking about big block cranks in general.