Engine Casting #	Make	Year	CID, #mains, number of cylinders	Possible Stamped Serial Numbers
14001133	Chevrolet	76-80	292 = 7
1782594	Chev	36	Canada	M5593000
1788201	Chev	37	Australia	R in serial # (?)
1970	Chevrolet	64-67	292 = 7
2135412	GMC	46-54	200,270 = 4
2193980	GMC	52-54	302
2324002	GMC	55-62	248,302
2324003	GMC	55-63	270
2324004	GMC	55-62	302
2404929	GMC	55-63	270 = 4m
289890	Chevrolet	63-77	292 = 7
327773	Chev 490 & Supr	1922-24	171-4cyl
328518	Chevrolet	73-77	292 = 7
328572	Chevrolet	73-76	250 = 7
328575	Chev/Buick/Olds/ Pontiac	68-84	250 = 7
328576	Chev/Buick/Pontiac	68-76	250 = 7
328578	Chevrolet	73-84	292 = 7
328880	Chevrolet	63-77	292 = 7
329990	Chevrolet	63-77	292 =7
344624	Chev Sup	1925	171 – 4cyl = 3
345504	Chev Sup	1926	171 – 4cyl = 3
346715	Chev	26??	171 – 4cyl = 3
348532	Chev	28	171 – 4cyl =3
348709	Chev	27	171 – 4cyl =3
352194	Chevrolet	73-84	292 =7
358825	Chevrolet	66-76	250 = 7
3629703	Chevrolet	50-52	235 = 4
364909	Chevrolet/Olds	75-79	292 = 7
3660439	Chev	41	235 = 4m
366855	Chev/Buick/Olds/ Pontiac	66-84	250 = 7
3692703	Chevrolet	50-51	235 = 4 PG	HDA,HDM,HEA,HEM JDA,JDM,JEA,JEM
3692708	Chevrolet	(51?)50-52	235
3692713	Chevrolet	(50?)50-52	Truck 235
3693374	Chevrolet	(46?)42-49	235
3701481	Chevrolet	54	235	TorF54L-Z
3701483	Chev	53	235	LDA,LDM,LEA,LEM,
3701946	Chevrolet	53 3-spd	235 dipper	LAA(?) ditto above.
3702436(part#?)	Chev	54-55	261
3703414	Chevrolet	54-56(??)	261
37127	Chevrolet	73-76	250 = 7
3733340	Chevrolet	55-57	261
3733414	Chev	55-57	261
3733813	Chevrolet	58	261
3733946	Chevrolet	54-55	235
3733949	Chevrolet	55 1st ser	235
3733950	Chevrolet	54-55	261
3737012	Chevrolet	55-57	261
3738307	Chevrolet	58-60 trk	235
3738365	Chevrolet	60-62	261
3738476	Chevrolet	58-62	235
3738813	Chevrolet	55-59	261
3739365	Chevrolet	58-62(59?)	261
3739716	Chevrolet	58-62(60)	235
3759365	Chevrolet	59	261
3764476	Chevrolet	58-62	235
3768925	Chev (half inch NPT oil gauge)	55 - +	261
3769	Chev	58 – 62	235
3769716	Chevrolet	60	235
3769717	Chevrolet	59-62	261
3769925	Chevrolet	58-62	261
377127	Chevrolet/Olds/ Pontiac	73-79	250 = 7
377129	Chevrolet	73-84	292 = 7
3773949	Chevrolet	54	235
3777178	Buick	68-76	250 = 7
3782856	Chevrolet	62-67	194 = 7
3782858	Chevrolet	62-67	194 = 7
378307	Chevrolet	60-62	235
3783949	Chevrolet	53-54	235
3788378	Chevrolet	62-74	292 = 7
3788406	Chevrolet	62-69	230 = 7
3788514	Chevrolet	62-70	153 =5–4cyl
3788813	Chevrolet	55-59(58?)	261
3789404	Chevrolet	63-76	292 = 7
3789412	Chevrolet	63-66	292 = 7
3789716	Chevrolet	63-72	292 = 7
3792852	GMC	62-66	194 = 7
3792858	Chevrolet	62-67	194 = 7
3821970	GMC	67-72	292 = 7
3833057	Chevrolet	62-70	194 = 7
3833067	Chevrolet	63-70	194 = 7
3833340	Chevrolet	55-57	261
383340	Chevrolet	55-57	261
3835253	Chevrolet	48 – 49	216	FA, GA
3835309	Chevrolet	48 - 49	235	FDA,FDM,FEA,FEM GDA,GDM,GEA,GEM
3835335	Chevrolet	47	235	EDA,EDM,EEA,EEM
3835353	Chevrolet	48-52	216
3835363	Chevrolet	54	235
3835374	Chevrolet	42-49	235
3835491	Chevrolet	54	235
3835497	Chev (half ton ?)	50 - 51	216	AHCA-BJCM  HAA-JCQ
3835527	Chevrolet	51	216
3835692	Chevrolet	52	235	KDA,KDM,KEA,KEM
3835794	Chevrolet	52-53	216
3835846	Chevrolet	53	235
3835849	Chev (half ton ?)	52 -53	216	AKCA-BLCP  KAA-LCQ
3835894	Chevrolet	53	216
3835911	Chevrolet	54-55	235
3835917	Chevrolet	54-55	235
3835946	Chevrolet	53	235
3835949	Chevrolet	54	235
3836012	Chevrolet	55-57	261
3836223	Chevrolet	55-57	235
3836233	Chevrolet	55-4/1/56	235
3836340	Chevrolet	57	261
3836386	Chevrolet	55-57	235
3837004	Chevrolet T56X	55-57	235-261
3837012	Chevrolet	55-57 Also42-51	261 ????  216 ????
3838004	Chev	55-57	235
3843363	Chevrolet	53-55	235
3850817	Chevrolet	62-78	230-250 = 7
3851656	Chevrolet	63-72	292 = 7
3851659	Chevrolet	63-76	292 = 7
3851859	Chevrolet	63-72	292 = 7
3854036	Chev/Olds/ Pontiac	62-76	230-250 = 7
3855914	Chevrolet	63-66	292 = 7
3855987	Chevrolet	63-71	292 = 7
3855991	Chevrolet	63-70	230 = 7
3856233	Chevrolet	55	235
3858190	Chevrolet	54-55	235
386855	Chevrolet	74-77	250 = 7
3877178	Buick/Olds/Chev/ Pont/GMC	62-78	230-250 = 7
3879875	Chevrolet	62-70	194 = 7
3886061	Chevrolet	63-66	292 = 7
3890011	Buick/Chev/Olds /Pontiac	68-72	250 = 7
3890013	Chevrolet	68-72	250 = 7
3892858	Chevrolet	64-67	194 = 7
389770	Chevrolet	42-51 (?)	216
3897702	Chevrolet	42-53 (?)	216
3921770	Chevrolet	66-76	292 = 7
3921967	Chevrolet	64-69	230 = 7
3921968	Chevrolet/Olds	64-76	230-250 = 7
3921970	Chevrolet	63-76	292 = 7
40050	Chev FA Early	1916-19	224 – 4cyl
43950	Chev FB	1919-22	224 – 4cyl
45834	Chev 490	1922	171 – 4 cyl
473180	Chev Standard	1933	182 3 main	Head = 600569
473741	Chev Standard	1934	182 3 main	Head = 473740
5485363	Chev	54	235
5845363	Chev	54	235
6107326	GMC	39 – 54	228
6107328	GMC	39 – 55	248
743	Chev 490	1916 – 17	171-4cyl
828575	Chevrolet	72-77	250 = 7main
835501	Chev	29 – 30	194 = 3main
836010	Chev	1936	206 = 3main	Head = 837981
836409	Chev	31	194 = 3main
836573	Chev	32	194 = 3main	Head = 836718
837591	Chev	35	206 = 3main	Early Head = 837230  Late Head = 837682
837231	Chev Master	1933 & 34	206 = 3 main	33=836961,34=837230
837751	Chevrolet	42-49	235 dipper
838101	Chev	37	216 = 4 main	Serial# 1 – 1187821
838710	Chev	38	216 = 4m	1187822 – 1915446  B1 - B10502
838941	Chev	39	216 = 4m	1915447 – 2697267  B10503 - B105461
838751	Chev	42	235 = 4m	BG, BL
839132	Chev	40	216 = 4m	2697268 – 3665902 B105462 - B221935
839400	Chev	41	216 = 4m	AA1001 - AA1163720  AC1001 - AC19549
839751	Chev	42 – 46	235 = 4m	BG, BL, DDA, DDM, DEA, DEM
839770	Chevrolet	(46-49?) 42	216	2AA, 2AC, BA DA, EA
8397715	Chevrolet	42-49	235
839910	Chevrolet	42-51	216
839931	Chevrolet	42-49	235
8692703(?)	Chev PG	50	235
8994256	Chevrolet	64-77	292 = 7
93403466	Chevrolet	75-83	250 = 7
93403467	Chevrolet	75-84	292 = 7
93406004	Chevrolet	75-84	292 = 7
967	Chev 490	1918 - 21	171-4cyl
9787437	Pontiac	66-67	230 = 7
9790043	Pontiac	68-69	250 = 7
9795066	Pontiac	68-69	250 = 7
9890043	Pontiac	68-69	250 = 7

 
 
 

1929 to 1952 U.S. & CANADIAN CHEVROLET CYLINDER BLOCKS CASTING VERSUS PARTS NOS.
MODEL YEAR	CASTING #S+ CANADIAN WHERE KNOWN	U.S. PARTS #S [NOT CANADIAN]
1929	835501	362473
1930	835501	362845
1931	836409 CANADIAN KNOWN: 886273	363148
1932	836573	363700
1933 CB	836915	364314
1933 CC	473180 ALSO CANADIAN	364838
1933 CA CB O	837231	364314
1933 CA CB O	837231	601964
1934 DA DB P	837231 ALSO CANADIAN ANOTHER CANADIAN: 1776846	600372
1934 DC	473741 ALSO CANADIAN	600373
1935	837591 ALSO CANADIAN ANOTHER CANADIAN: 1782594 MAPLE LEAF TRUCK BLOCK: 1765434	601423
1936	836010	602028
1935-36 FA FB FC FD R	836010 CANADIAN: 1782594	604877
1937-1939	838941 CANADIAN: 1788201 ALSO CANADIAN: 838941 [SAME AS 1939 U.S. CAST #!]	603401
1937-1939	838941	607874
1940	839132	604370
1940	839132	607876
1941 216	839400	605191
1941 216	839400	607890
1941 235	839400	605472
1941 Y 235	839400	605473
1941-1949 216	3835253 3835309	3688770 3692682
1941-1949 235	3835309	3688771
1942 216	839910	607891
1942 235	839910	606636
1942-1947 216	839910	606537
1942-1947 235	839751	606538
1942-1947 235	3835335	606538
1948-1949 235	3835309	3847684
1950-1951 216	3835497	3693846
1950 216	3835497	3693848
1950 235 ex PG	3692713	3693847
1950 235 ex PG	3692713	3693849
1950-1951 235	3692703	3693814
1952 216	3835849	3701164
1952 235	3835692	3701165

 

Casting Numbers

  Casting number is located below ignition  distributor (Dist).
 

Serial number is located by fuel pump on 29 - 37 engines.

Hence; a 36 block #836010, has a full water jacket, Dipstick and oil filler on left and Serial number by fuel pump.

A 37 block #838101, (Pictured above), has dipstick and oil filler on right, serial number by fuel pump, and two bolts hold the Ignition distributor on.

38 block #838710, has Serial number by two bolt Dist, where it stayed on 6 cylinder engines to the end of production of 7-main engines in the early 90's.

39 engines, #838941, had only one bolt to hold the Ign Dist in place and last year for Oil Dist to have large brass nut.

40 #839132, was the first year of 3 screw Oil Dist and last year for one inch & a quarter hole 37 - 40 water pump.

The numbers I took personally, I know to be correct for the following years 1927-31, & 1937 - 54. Other numbers I've copied from reliable sources but have put question marks (????) when the numbers were duplicated or didn't make sense. Example: 1951 & 52 could not use same block cuz motor mounts were different.

The stamped serial number only reflects the vehicle the engine was originally mounted in.  It may be a replacement engine from a different year as new blocks are shipped unstamped. I have a 1954 261 truck engine originally used in a 1940 school bus therefore having the 1940 serial number stamped on it. It would have been the proper replacement engine in 1954 but NOT the original engine.

I identify the blocks by physical characteristics which I will brief you on in a few minutes, but you have to remember a lot of stuff of little other value.

Given the list of casting numbers on the preceding pages and a wire brush, you can identify any 4 or 6 cylinder Chev engine made before 1984. The numbers are different for the engines made in Canada but the physical characteristics are the same for the respective year. Australia and Europe used Canadian blocks. On the 37 block pictured above, the casting numbers are located below the ignition distributor below the cast GM. In 1954 they're in between the fuel pump and front of block.

Physical characteristics: Before 1925, the 4 cylinder engines had the ignition distributor attached behind the gear driven generator so no dist  hole in block. 1928 had push rod covers and 2 port head so casting surfaces in block. 29 – 36 3 main bearing 6s had oil filler and dipstick on left and serial number by fuel pump. 33-34 "standard" (bastard) engine had water pump in head.

(Repeat) The 1937 block pictured above has 2 bolts holding the Ignition distributor on, Dip stick and oil filler on right, but last year for serial # by fuel pump. 38 moved serial by ignition distributor. 39 had one brass bolt holding ignition distributor. 40 had 3 screws holding oil distributor under exhaust manifold rather than large brass bolt as before. The 37 – 40 water pump had one hole to block approximately 1¼;" diameter.

1941 – 54 had two water pump holes approximately 1" diameter. The 235s from 41 – 49 had threads in dipstick to attach dipstick tube on military 10-quart trux. The 216 did not. The 50 – 52 235s had short push rod cover with smooth cast-iron between sparkplugs. 53 – 63 235 & 261 had 3 lumps of cast-iron between spark plugs. 1952 - 54 had 3 boltholes on both sides of block for motor mounts. 261 engines had these  bosses but they were not drilled or tapped.

1955 – 63 had 4" hole for water pump.

All 1933 and newer engines had different motor mounts on trux than cars tho same block may have been used in some cases.

    In England,  there was a tax on the size of the engine bore.  Hence, there were many early British engines with minute bores and immense strokes to counter act this short coming.
    1937 Chevrolets sold in Europe were available with the Cheetah engine.  The Cheetah engine was 196 cu in or 2945 cc with a bore & stroke of 81 x 95.2m m. The original engine was in metric 3548 c.c. with bore & stroke of 88.9 x 95.25 m.m. The Opel metricised 216 was of 3602 c.c. with bore & stroke of 90 x 95 m.m. plus there was the 2.5 litre Opel that was also fitted in Chevrolets of 2473 c.c. or 80 x 82 m.m. This must also have been Chevrolet-based.
 

This has been very brief and there are many more ways to confirm each year and application. That’s why the list of casting numbers may be easier to use.

Good Luck!!