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Tag Team De-coding cowl tags and vin numbers.

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  #1  
Old Nov 12th, 04, 10:00 PM
YenkoChevelle69 YenkoChevelle69 is offline
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This is a 168 tooth flywheel, but we are unsure of what year they are....

3993827 writen in paint
Cast is 3973457 or 3978457
date code is E 1 8
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  #2  
Old Nov 13th, 04, 10:26 AM
DaleM DaleM is offline
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I show GM part # 3993827 to be 70-72 Chevelle 454.
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  #3  
Old Nov 14th, 04, 3:51 PM
YenkoChevelle69 YenkoChevelle69 is offline
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Quote:
Originally posted by Dale McIntosh:
I show GM part # 3993827 to be 70-72 Chevelle 454.
Hey Dale, Thanks, any idea on that date code? He thinks it's off a 1988ish LS6 crate engine.
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  #4  
Old May 9th, 06, 12:57 PM
art silva art silva is offline
 
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Default Re: Flywheel decoding help?

Quote:
Originally Posted by YenkoChevelle69
This is a 168 tooth flywheel, but we are unsure of what year they are....

3993827 writen in paint
Cast is 3973457 or 3978457
date code is E 1 8
Have you found out about Flywheel part # 3973457, I have same flywheel behind 1974 454 (not factory stock) and have vibration, could be pressure plate out of balance but I want to know what I own, Thank you ART.
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  #5  
Old May 10th, 06, 9:20 PM
Ralph67 Ralph67 is offline
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Default Re: Flywheel decoding help?

how about flywheel #3789733 it came off my 67.
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  #6  
Old May 13th, 09, 9:02 PM
russell_shigeta russell_shigeta is offline
 
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Default Re: Flywheel decoding help?

This is strange.. I too have a flywheel (it's definitely off a 454, from the balance weight), but it was from a 1992 454 Gen V.

I should mention, mine has an "N", so the casting actually says 3978457N

here is a pic of mine.

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Last edited by russell_shigeta; May 13th, 09 at 9:05 PM. Reason: add texy
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  #7  
Old Aug 22nd, 10, 1:41 AM
russell_shigeta russell_shigeta is offline
 
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Default Re: Flywheel decoding help?

While doing some research on 454 flywheels, I found that there are two different part # for the flywheels. Apparently, there is a difference between the Gen V forged, and Gen V cast crank flywheels!

So perhaps that explains why Chevy suggested a different flywheel for my 454 HO, than the stock truck 454 flywheel I have in the pic.
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  #8  
Old Feb 9th, 14, 7:51 PM
beaver depew beaver depew is offline
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Default Re: Flywheel decoding help?

hi russel, did you get the forged or cast flywheel, I have gen v forged and would like to know how to tell the difference or a part # id code , thanks in advance
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  #9  
Old Feb 11th, 14, 10:40 PM
Verle Verle is offline
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Default Re: Flywheel decoding help?

Both numbers come up as 454/LS5

E 1 8
E - May
1 - 1st day
8 - year. probably 68, could be 78 as they used the same flywheel in trucks.
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