Help Decode My engine
Thread Starter
Heel & Toe
Joined: Jan 2006
Posts: 16
Likes: 2
From: Naples Florida
Help Decode My engine
Hello all,
I have a 1976 Corvette that does not have the original motor. When I go to purchase new parts ie(fuel pump) I don't know what parts to buy because I truly don't know what motor I have. Can someone help me decode it? I have looked online but I get conflicting information. It would be a great help!
Front of motor on passenger side I have these numbers:
16J197912
52806
T1222CMJ
Rear motor on driver side I have these numbers:
3970014
K 19 76
Here are some pics... best I could get. Thank you for your help!
[img=http://s32.postimg.org/556l6ayep/front.jpg]
[img=http://s32.postimg.org/acroarf01/rear.jpg]
[img=http://s32.postimg.org/lqe7lypip/rear2.jpg]
I have a 1976 Corvette that does not have the original motor. When I go to purchase new parts ie(fuel pump) I don't know what parts to buy because I truly don't know what motor I have. Can someone help me decode it? I have looked online but I get conflicting information. It would be a great help!
Front of motor on passenger side I have these numbers:
16J197912
52806
T1222CMJ
Rear motor on driver side I have these numbers:
3970014
K 19 76
Here are some pics... best I could get. Thank you for your help!
[img=http://s32.postimg.org/556l6ayep/front.jpg]
[img=http://s32.postimg.org/acroarf01/rear.jpg]
[img=http://s32.postimg.org/lqe7lypip/rear2.jpg]
Drifting
Joined: Jun 2010
Posts: 1,312
Likes: 156
From: Richmond Texas
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Looks like the CMJ suffix was used on a 1974 350 or a 1980 305.
The casting number of 3970014 however was used in '70-'73 Camaro 350's
Good luck... GUSTO
The casting number of 3970014 however was used in '70-'73 Camaro 350's
Good luck... GUSTO
Last edited by GUSTO14; May 13, 2016 at 11:55 PM.
Thread Starter
Heel & Toe
Joined: Jan 2006
Posts: 16
Likes: 2
From: Naples Florida
Thanks
Intermediate
Joined: Jan 2012
Posts: 35
Likes: 1
Useing a book that i got from a engine builder who was retireing and closeing his shop,
014 block is a 350 cast at tonawanda engine from 70 to early 73 in 2 & 4 bolt main.
The cmj code for those years, passenger 160 hp with turbo 400 ,it didnt list vehicles
014 block is a 350 cast at tonawanda engine from 70 to early 73 in 2 & 4 bolt main.
The cmj code for those years, passenger 160 hp with turbo 400 ,it didnt list vehicles
Drifting
Joined: Jun 2010
Posts: 1,312
Likes: 156
From: Richmond Texas
Well, you should be able to tell if it is a 350 or a 305. Which leave one or the other. I'm assuming it is the 350.
350 built in Tonawanda Dec 22 1974 for an early 76 car. The second number in the VIN 16J197912 which is a 6 denotes a 76 model. I can't figure out what the J denotes. That might tell you exactly what it was in. All this based on that URL I sent you.
350 built in Tonawanda Dec 22 1974 for an early 76 car. The second number in the VIN 16J197912 which is a 6 denotes a 76 model. I can't figure out what the J denotes. That might tell you exactly what it was in. All this based on that URL I sent you.
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
all 350 blocks are basically the same on the outside,
purchase acc. for the year of the car, so they will fit around frame, exhaust and such.
purchase acc. for the year of the car, so they will fit around frame, exhaust and such.
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Since it could have been a 2 or a 4-bolt main engine, if you can determine that it is a 4-bolt engine that will give you some good data. You can use a portable bore scope to peer into the pan and possibly see if it has 4-bolt mains.
"NastyZ28" lists it as an LA built Camaro, so 4-bolt mains, especially in a Camaro would be my guess. 4-bolt mains were typically reserved for the higher horsepower engines and would normally include things like a forged crank. You can also pull a valve cover and post the casting numbers on the heads. This will provide even additional information on the engine, assuming they are original to the block.
If you go to this site and read what was offered in the '73 Camaro, you should also be able to verify some of the numbers you've found and may yet find regarding your engine.
https://www.gmheritagecenter.com/doc...let-Camaro.pdf
Good luck... GUSTO
"NastyZ28" lists it as an LA built Camaro, so 4-bolt mains, especially in a Camaro would be my guess. 4-bolt mains were typically reserved for the higher horsepower engines and would normally include things like a forged crank. You can also pull a valve cover and post the casting numbers on the heads. This will provide even additional information on the engine, assuming they are original to the block.
If you go to this site and read what was offered in the '73 Camaro, you should also be able to verify some of the numbers you've found and may yet find regarding your engine.
https://www.gmheritagecenter.com/doc...let-Camaro.pdf
Good luck... GUSTO
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Drifting
Joined: Jun 2010
Posts: 1,312
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From: Richmond Texas
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
A — Atlanta, Georgia (Lakewood)
B — Baltimore, Maryland
C — South Gate, California
D — Doraville, Georgia
E — Linden, New Jersey
F — Flint, Michigan (Chevrolet)
G — Framingham, Massachusetts
H — Flint, Michigan (Buick)
J — Janesville, Wisconsin
K — Kansas City, Missouri (Leeds)
L — Los Angeles, California (Van Nuys)
M — Lansing, Michigan
N — Norwood, Ohio
O — Oakland, California
P — Pontiac, Michigan (Pontiac)
Q — Detroit, Michigan (Cadillac/Clark Street)
R — Arlington, Texas
S — St. Louis, Missouri
T — Tarrytown, New York
U — Lordstown, Ohio
V — Pontiac, Michigan (GMC)
W — Ypsilanti, Michigan (Willow Run)
X — Fairfax, Kansas
Y — Wilmington, Delaware
Z — Fremont, California
1 — Oshawa, Ontario
2 — Oshawa, Ontario (Truck)
3 — Ste. Therese, Quebec
4 — Scarborough, Ontario
6 — Oklahoma City, Oklahoma
I tried to find what was assembled there in the 70's and could find nothing that said what they built. Most recently they built SUV's but the plant is now closed and apparently GM is putting it up for sale.
Good luck... GUSTO
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Accirding to Wikipedia, 4th Generation Impala, (1965-1970) was manufactured in the Janesville plant.
https://en.wikipedia.org/wiki/Chevrolet_Impala
As was the 1st Generation Caprice (1966-1970), along with the 3rd Generation Caprice (1977-1990). Apparently the 2nd Generation (1971-1976) was not however built in Janesville.
https://en.wikipedia.org/wiki/Chevrolet_Caprice
Interestingly GM does list a CMJ engine for the 1975 BelAir, Impala, Caprice Classic and Caprice Estate.
Turbo-Fire 350, 350 Cubic Inch V-8, Base Engine
CMJ - Regular Production Engine, Turbo Hydra-matic
https://www.gmheritagecenter.com/doc...-Chevrolet.pdf (page 4)
although, based on the information above, they were not built in Janesville during 1975.
I'm sooooo confused... GUSTO
https://en.wikipedia.org/wiki/Chevrolet_Impala
As was the 1st Generation Caprice (1966-1970), along with the 3rd Generation Caprice (1977-1990). Apparently the 2nd Generation (1971-1976) was not however built in Janesville.
https://en.wikipedia.org/wiki/Chevrolet_Caprice
Interestingly GM does list a CMJ engine for the 1975 BelAir, Impala, Caprice Classic and Caprice Estate.
Turbo-Fire 350, 350 Cubic Inch V-8, Base Engine
CMJ - Regular Production Engine, Turbo Hydra-matic
https://www.gmheritagecenter.com/doc...-Chevrolet.pdf (page 4)
although, based on the information above, they were not built in Janesville during 1975.
I'm sooooo confused... GUSTO