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Thread: GM Crankshaft Casting Numbers
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- 05-14-2024, 12:28 AM #1
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Administrator Join DateNov 2022Posts62
GM Crankshaft Casting Numbers
Crankshaft Identification
Use these casting numbers to identify the crankshaft you have.
Small Block Casting numbers
Casting Number
CID
Years
Journals
Stroke
Comments
1130
307/327
68-73
2.45/2.10
3.25
Nodular Iron
1178
302
2.45/2.10
3
Forged
1181
305/350
68-76
2.45/2.10
3.48
Nodular Iron
1182
350
2.45/2.10
3.48
Forged
2680
327
2.30/2.00
3.25
Forged
2690
350
2.45/2.10
3.48
Forged
3279
302
68-69
2.45/2.10
3
Forged
4577
327
62-67
2.3/2.0
3.25
Nodular Iron
4672
307/327
68-73
2.45/2.10
3.25
Nodular Iron
310514
350
77-85
2.45/2.10
3.48
Nodular Iron
330550
350
73-75
2.45/2.10
3.48
Forged
354431
262
75-76
2.45/2.10
3.1
Nodular Iron
3727449
283
57-67
2.3/2.0
3
Forged
3729449
265
55-57
2.3/2.0
3
Forged
3734627
327
62-67
2.3/2.0
3
Forged
3735236
265/283
55-67
2.3/2.0
3
Forged
3735263
283
57-63
2.3/2.0
3
Forged
3782680
327
62-67
2.3/2.0
3.25
Forged
3814671
327
2.30/2.00
3.25
Forged
3815822
265/283
55-67
2.3/2.0
3
Forged
3835236
283
57-65
2.3/2.0
3
Forged
3836266
265/283
56-63
2.3/2.0
3
Forged
3849847
283
57-67
2.3/2.0
3
Forged
3876764
283
64-67
2.3/2.0
3
Nodular Iron
3876768
283
64-67
2.3/2.0
3
Nodular Iron
3884577
327
2.30/2.00
3.25
Forged
3892690
350
68-85
2.45/2.10
3.48
Forged
3911001
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3911011
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3914672
327
2.45/2.10
3.25
Forged
3923279
302
2.45/2.10
3
Forged
3932442
305/350
69-85
2.45/2.10
3.48
Nodular Iron
3941174
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3941178
302
68-69
2.45/2.10
3
Forged
3941182
350
68-76
2.45/2.10
3.48
Forged
3941188
350
2.45/2.10
3.48
Forged
3949847
283
64-67
2.3/2.0
3
Nodular Iron
3951130
327
2.45/2.10
3.25
Forged
3951529
400
70-80
2.65/2.10
3.75
Nodular Iron
10106122
350
90-95
2.76/2.10
3.66
Forged LT-5 ZR-1
10168568
265
2.45/2.10
3
Cast One Piece Seal
12552216
346
2.558/2.10
3.62
Cast LS-1 One Piece Seal
14088526
305
1986
2.45/2.10
3.48
Nodular Iron One piece seal
14088532
350
86-88
2.45/2.10
3.48
Forged One piece seal
14088535
305/350
86 & UP
2.45/2.10
3.48
Nodular Iron One piece seal
14088552
350
86 & UP
2.45/2.10
3.48
Forged One piece seal
Big Block Crankshaft
Casting Number
CID
Years
Journals
Stroke
Comments
3520
454
2.75/2.20
4
Forged
3521
454
70-88
2.75/2.20
4
Forged LS-6
3524
454
2.75/2.20
4
Forged
6223
366/396/402/427
68-76
2.75/2.20
3.76
Forged
7115
366/396/402/427
65-76
2.75/2.20
3.76
Forged
7416
454
70-88
2.75/2.20
4
Forged
7463
454
2.75/2.20
4
Forged
336782
454
2.75/2.20
4
Cast
353039
454
70-88
2.75/2.20
4
Nodular Iron
353638
454
2.75/2.20
4
359730
454
2.75/2.20
4
3732692
348
2.75/2.20
4
3732692
348
1958
2.50/2.20
3.25
Forged
3733223
409
62-65
2.50/2.20
3.5
Forged
3733223
348
2.50/2.20
3.25
Forged
3733226
348
2.50/2.20
3.25
Forged
3733226
348
1958
2.50/2.20
3.25
Forged
3741640
348
2.50/2.20
3.25
Forged
3741640
348
59-61
2.50/2.20
3.25
Forged
3741642
348
2.50/2.20
3.25
Forged
3741642
348
59-61
2.50/2.20
3.25
Forged
3788072
409
1961
2.50/2.20
3.5
Forged
3788072
409
2.50/2.20
3.5
Forged
3795589
409
61-62
2.50/2.20
3.5
Forged
3795589
409
2.50/2.20
3.5
Forged
3804816
366/396/402/427
61-76
2.75/2.20
3.76
Nodular Iron
3815822
348
58-61
2.50/2.20
3.25
Forged
3815822
348
2.50/2.20
3.25
Forged
3824553
348
58-61
2.50/2.20
3.25
Forged
3824553
348
2.50/2.20
3.25
Forged
3829027
409
2.50/2.20
3.5
Forged
3829027
409
1963
2.50/2.20
3.5
Forged
3837466
409/427
2.50/2.20
3.65
Forged Z-11Special performance
3837466
409
1963
2.50/2.20
3.5
Forged Z-11
3838416
409
64-65
2.50/2.20
3.5
Forged
3838416
409
2.50/2.20
3.5
Forged
3856223
396/402
65-71
2.75/2.20
3.76
Nodular Iron
3863114
402
2.75/2.20
3.76
3863144
366/396/402
68-85
2.75/2.20
3.76
Forged
3874874
366/396/402/427
66-85
2.75/2.20
3.76
Forged
3879621
427
2.75/2.20
3.76
Forged
3882841
396
2.75/2.20
3.76
Forged
3882842
366/396/427
2.75/2.20
3.76
Forged
3882849
366/396/427
2.75/2.20
3.76
Forged
3887114
396
2.75/2.20
3.76
Forged Special performance
3904815
366/396/402/427
65-76
2.75/2.20
3.76
Nodular Iron
3962523
454
2.75/2.20
4
Forged
3963521
454
2.75/2.20
4
Forged Special performance
3963524
454
70-72
2.75/2.20
4
Forged
3965746
NA
NA
NA
Semi finished Forged crank
3965753
NA
NA
NA
Semi finished Forged
3967416
454
70-71
2.75/2.20
4
Forged
3967463
454
70-88
2.75/2.20
4
Forged
3975495
454
2.75/2.20
4
3975945
454
2.75/2.20
4
3993804
NA
NA
NA
Raw Forged crank
3993878
454
2.75/2.20
4
Forged
10051169
NA
NA
NA
Raw Forged
10114186
427
2.75/2.20
3.76
Forged
10114187
396
2.75/2.20
3.76
Cast
10114188
454
2.75/2.20
4
Cast One Piece Seal
14097044
454/502
2.75/2.20
4
Forged One Piece Seal
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11-17-2024, 10:05 PM
Crankshaft Idemntification
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