Engine Number - located on a boss on the right front of the engine block. ZR1's are located on the left rear of the engine block. All Corvette engines are stamped with an assembly plant code, month and day produced and engine type. It is located below the engine number.
Example: V0101ZSA
V
|
Flint Plant
|
01
|
Month Built (January)
|
01
|
Day Built (1st)
|
ZSA
|
Engine Type 350
|
| Assembly Plant |
Code |
| Tonawanda |
T |
| Flint (motor) |
F |
| Flint (engine) |
V |
All engines also have the division identification number, model year, assembly plant designation and production sequence number (last 6 digits) of the Vehicle Identification Number stamped on the engine.
Example: 1L5100001
| 1 |
Chevrolet Division |
| L |
Model Year (1990) |
| 5 |
Bowling Green |
| 100001 |
Production Sequence Number |
Engine
Code |
VIN Engine
Code |
Option
Number |
CID |
Horse-
Power |
Comp
Ratio |
Carb |
Trans |
| ZSA |
8 |
L98 |
350 |
245/250 |
9.5:1 |
FI |
Auto |
| ZSB |
8 |
L98 |
350 |
245/250 |
9.5:1 |
FI |
Man |
| ZSC |
8 |
L98 |
350 |
245/250 |
9.5:1 |
FI |
Auto/EOC |
| ZRJ |
J |
LT5 |
350 |
380 |
11.1:1 |
FI |
Man
|
EOC - Engine Oil Cooler
Transmission Number on the 700-R4 automatic transmission is located on the right rear oil pan rail and includes the year, model, Julian build date and shift built.
Example: 0YDMYXXXXXXXX267A
0
|
Model Year (1990)
|
YD
|
Transmission Type (THM 700-R4)
|
M
|
Build Location (Toledo)
|
XXXXXXXX
|
Transmission Serial Number
|
| 267 |
Julian Date |
| A* |
Shift built (1st) |
* A & B - First shift, C & H - Second shift, D- Day, N - Night
The Build Date Code starts wit5h the Julian date (day of year) on which 1990 production started. The build date code continues with the Julian date until December 31 (365). The sequence then continues until the end of the 1990 production.
The ML9 6-speed ZF Manual Transmission does not have the transmission codes located on the case. The only place that it is found is on the bar code label. There is a plate riveted to the side of the transmission case that carries the ZF serial number and Customer part number. the part number for each year corresponds to the broad cast code.
Engine
|
Part Number
|
Code |
LT5
|
10150046 |
DHT
|
L98
|
10150047
|
DHU |
Rear Axle Code is identified by a yellow sticker attached to the left mounting bracket of the differential cover.
| Ratio |
Code
|
2.59
|
8YA
|
2.59
|
CQT
|
2.73
|
8YB
|
2.73
|
CQU
|
3.07
|
8YC
|
3.07
|
CQW
|
3.33
|
8YW
|
3.33
|
CQP
|
3.45
|
6YD
|
| 3.45 |
CQR |
