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Engine code stamping

Forum: C3 Engines, Driveline and Handling

7 Messages
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Engine code stamping

Posted: 5/23/25 9:21amMessage 1 of 7
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steves73
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Greensboro, NC - USA
Joined: 5/11/2025
Posts: 1
Vette(s): 1973 corvette 454 4sp

Anyone ever seen a block with letters reversed? My 73 454 should read CWM but mine reads CMW vin is correct and block pad has never been tampered with  I can’t be the only one with this issue

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Re: Engine code stamping

Posted: 5/23/25 10:14amMessage 2 of 7
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F4Gary
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Grapevine, TX - USA
Joined: 8/26/2006
Posts: 1563
Vette(s): 1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport M7 convertible.

Dyslexic assembly line worker?

   

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Re: Engine code stamping

Posted: 5/23/25 9:46pmMessage 3 of 7
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22737
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Not unheard of for assy line worker to load one or more of the stamp characters upside down. Assuming this was done on the line, it's possible it was caught immediately and corrected, or there may have been several more stamped like that before it was noticed. Typically, however, mistakes would have been ground out and re-stamped. 

Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Re: Engine code stamping

Posted: 11/26/25 7:32pmMessage 4 of 7
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69GeeGee
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Saint Johns, FL - USA
Joined: 11/26/2025
Posts: 2
Vette(s): 1969 Red T-top base Stingray. Family legacy vehicle inherited from my grandmother (original owner).
Need help. Im trying to decode my engine. Family lore states my grandfather was swindled by the dealer or mechanic shop shortly after owning the car. I know the engine was swapped. But that's all I know. The front of the engine stamps are 72584 V0630TKA C8S212089. The casting number on the back is 3970010.
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Re: Engine code stamping

Posted: 11/26/25 9:55pmMessage 5 of 7
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22737
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

TKA suffix identifies as a 1976 350, 4bbl, 165 hp, Chevy C10/1500. V= Flint assy plant, 0630= June 30th assy date. Lower numbers are the vehicle sequence/serial number. Upper numbers are NOT factory....perhaps it was a reman engine and those numbers were stamped on it then.

Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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Re: Engine code stamping

Posted: 11/28/25 10:03amMessage 6 of 7
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69GeeGee
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Saint Johns, FL - USA
Joined: 11/26/2025
Posts: 2
Vette(s): 1969 Red T-top base Stingray. Family legacy vehicle inherited from my grandmother (original owner).
Wow. That is eye opening. So my vette isn't a vette! But the casting numbers really don't make any sense then. 3970010 on the back driverside.
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Re: Engine code stamping

Posted: 11/28/25 5:52pmMessage 7 of 7
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22737
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
That casting was used for years, and for several different engine configurations. It is a fairly common casting.

Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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