Chrysler flathead engine

The Chrysler flathead engine is a flathead automotive engine manufactured by the Chrysler Corporation from 1924 through the early 1960s. The flathead engine came in four-,six-, and eight-cylinder configurations and varying displacement, with both a cast iron and cast aluminum cylinder head. It was installed in Chrysler, DeSoto, Dodge and Plymouth branded vehicles.

Chrysler Flathead engine
Overview
ManufacturerChrysler Corporation
Also calledChrysler Sidevalve engine
Production19241964
Layout
ConfigurationSide-valve
Cylinder block materialCast iron
Cylinder head materialCast iron
Combustion
Fuel systemCarburetor
Fuel typeGasoline
Chronology
Successor

Straight-4

Chrysler introduced a straight-four derivative of their new flathead straight-six in 1926. Initially used by Chrysler, the straight-four was fitted to Plymouth and Dodge light trucks beginning in 1929, lasting in production through 1933.

The original version displaced 185.8 cu in (3,044 cc) and produced 38 hp (28 kW). This was only produced in 1926, with displacement reduced to 170.3 cu in (2,791 cc) for 1927 and 1928. Power was initially rated the same but was upped to 45 hp (34 kW) during the 1928 model year.

After the introduction of the Plymouth brand in 1929, the base engine was enlarged to 175.4 cu in (2,874.3 cc) with the power rating remaining the same. It also equipped Dodge light trucks in 1929–1930. It was enlarged again to 196.1 cu in (3,213 cc) in 1930 with 48 hp (36 kW). The engine was slightly revised for 1931 with 56 hp (42 kW) and 1932 with 65 hp (48 kW) for Plymouth only, Dodge continued with the 48 hp (36 kW) from 1931 to 1933. A small-bore version was developed for export markets in 1931, with a narrower bore which brought the RAC rating down from 21 to 15.6 hp. For 1932 the bore was made a little slimmer yet, bringing the tax horsepower rating to just beneath 15.5.

Chrysler did not offer a four-cylinder engine again until 1981 with the Chrysler 2.2 & 2.5 engine used in the Chrysler K platform.

DisplacementYear(s)HorsepowerApplicationsBoreStroke
186 cu in (3,044 cc)192638Chrysler model F-583+58 in (92.1 mm)4+12 in (114.3 mm)
170 cu in (2,791 cc)192738Chrysler Series 504+18 in (104.8 mm)
192838-45Chrysler Series 52
192845Plymouth Model Q
175 cu in (2,875 cc)192945Plymouth U4+14 in (108.0 mm)
192945Dodge 1/2 Ton
193045Dodge U1-A/B/C
196 cu in (3,213 cc)193048Plymouth 30U4+34 in (120.7 mm)
193156Plymouth PA
193148Dodge UF-10, U1-B/C
193265Plymouth PB
193248Dodge E, UF-10, U1-B/C
193348Dodge UF10, UG20/21
146 cu in (2,388 cc)1931n/aPlymouth PA (export model, 89 built)[1]3+18 in (79.4 mm)
144 cu in (2,364 cc)1932n/aPlymouth PB (export model, 58 built)[1]3+764 in (79.0 mm)

Straight-6

The 218-cubic-inch flathead six as used in a 1951 Plymouth Cranbrook

There were essentially two lines of flathead inline-sixes made by the Chrysler Corporation. Chrysler and DeSoto used a longer 25 in (640 mm) block with greater cylinder spacing, while Dodge and Plymouth shared a 23 in (580 mm) block. There is one exception to this: when Chrysler established an engine foundry in Windsor, Canada in 1938, it was decided to only use the long block for all Canadian-built engines. These engines received a trailing "C" in their designation, becoming P8C for example. Thanks to judicious dimensioning, the Canadian 201- and 218-cubic inch engines had nearly identical displacement to their American cousins.[2]

Beginning in 1938, the 201 cu in (3,299 cc) inline-six was used in Massey Harris's Model 101 tractor (later known as the 101 Super). It continued to be used by Massey until 1940, when it was supplanted by the 218 cu in (3,568 cc).[3] In 1940, Chrysler's 242 cu in (3,966 cc) straight six went into Massey's 201 Super, which lasted until 1942.[3]

During World War II, the 251 cu in (4,107 cc) flathead six was used as the basis for the Chrysler A57 multibank tank engine.[4]

The last automotive use of the Chrysler flathead inline-six was in 1968. It was replaced by the much more efficient OHV Slant-6 released in 1960, which appeared in most Dodge trucks starting in 1961. According to the Standard Catalog of American Light-Duty Trucks, the Dodge Power Wagon WM300 used the 251 inline flathead six until 1968, after which the Dodge WM300 was dropped for the 1969 production year. The flathead remained in production until the early 1970s for industrial and agricultural use.

DisplacementYearsHorsepowerApplicationsBoreStroke
201 cu in (3,301 cc)1924-192568Chrysler B-70 Six3 in (76.2 mm)4+34 in (120.7 mm)
289 cu in (4,730 cc)192692Chrysler Series E-803+12 in (88.9 mm)5 in (127.0 mm)
1927-192892Chrysler Series 80
219 cu in (3,582 cc)192668Chrysler Model G-703+18 in (79.4 mm)4+34 in (120.7 mm)
192768Chrysler Series 70
193075Chrysler Series 70 (early)
193068Chrysler Series 66 (late)
193168Chrysler Series 66
180 cu in (2,954 cc)192754Chrysler Series 603 in (76.2 mm)4+14 in (108.0 mm)
192854 (std.)
60 (opt.)
Chrysler Series 62
175 cu in (2,867 cc)192955DeSoto Series K4+18 in (104.8 mm)
193057DeSoto Series K
1932n/aChrysler Richmond (CIX; UK only)
1933n/aChrysler Richmond (COX; UK only)
190 cu in (3,111 cc)1930-193261Dodge Series DD3+18 in (79.4 mm)
193370Dodge Series DQ (CDN/export)
1930-193160DeSoto Series CK
193370 (std.)
76 (opt.)
Plymouth PC/PCXX/PD
161 cu in (2,633 cc)1930n/aDeSoto Series CK (UK)2+78 in (73.0 mm)
1930n/aDodge Series DD (UK)[5]
1931-1932n/aDeSoto Series SAX (export, late cars sold as "Chrysler Light Six")[6]
1933n/aPlymouth PC/PD/Chrysler Kew/Wimbledon (export models, 651 built)[7]
196 cu in (3,205 cc)192965 (std.)
72 (opt.)
Chrysler Series 653+18 in (79.4 mm)4+14 in (108.0 mm)
193062Chrysler Series 66 (until Feb. 1930, longer in UK)
1930-193162Chrysler Series CJ
201 cu in (3,299 cc)1938n/aPlymouth P5/P6 (Canada-made, late introduction)3+38 in (85.7 mm)3+34 in (95.3 mm)
1938n/aDodge Series D9/D10 (Canada-made, late introduction)
1939n/aPlymouth P7/P8 (Canada-made)
1939n/aDodge Series D12/D13 (Canada-made)
201 cu in (3,299 cc)193375 (std.)
81 (opt.)
Dodge Series DP3+18 in (79.4 mm)4+38 in (111.1 mm)
193477Dodge Series DT (CDN/export)
77 (std.)
82 (opt.)
Plymouth PE/PF/PFXX/PG
Chrysler Wimbledon (UK)
193582Dodge Series DV/DV-6 (CDN/export)
Plymouth Model PJ
Chrysler Wimbledon (UK)
193682Dodge Series D-3/D-4 (CDN/export)
Plymouth P1/P2
Chrysler Wimbledon (UK)
193782Dodge Series D6/D7 (CDN/export)
82 (std.)
65 (Economy)
Plymouth P3/P4
Chrysler Kew/Wimbledon (UK)
70Plymouth PT50 (commercials)
193882Dodge Series D9/D10 (CDN/export)
82 (std.)
65 (Economy)
86 (opt.)
Plymouth P5/P6
Chrysler Kew/Wimbledon (UK)
70Plymouth PT57 (commercials)
193982Dodge Series D12/D13 (export)
82 (std.)
86 (opt.)
Plymouth P7/P8
Chrysler Kew/Wimbledon (UK)
70Plymouth PT81 (commercials)
194084 (std.)
87 (opt.)
Plymouth P9/P10
79Plymouth PT105 (commercials)
194187 (std.)
92 (opt.)
Plymouth P11/P12
82Plymouth PT125 (commercials)
170 cu in (2,793 cc)1931n/aDodge Series DH (UK)[5]2+78 in (73.0 mm)
1931-1932n/aChrysler CMX (UK, from Aug. 1931)
1932-1933n/aDeSoto SCX/Chrysler Mortlake (UK)
1933n/aDeSoto SDX/Chrysler Wimbledon (UK)
1933n/aDodge Series DP Victory (UK)
1934n/aDodge Series DR Victory (UK)
1934n/aPlymouth PE/PF (export models)[8]
Chrysler Kew/Wimbledon (UK)
1935n/aDodge Series DU Victory (UK)
1935n/aPlymouth PJ (export models, 754 built)
Chrysler Kew (UK)
1936n/aDodge Series D-2 Victory (UK)
1936n/aPlymouth P1/P2 (export models, 661 built plus 35 Dodge D-3/D-4)
Chrysler Kew (UK)
1937n/aPlymouth P3/P4 (export models, 657 built plus 39 Dodge D6)
Chrysler Kew (UK)
1938n/aPlymouth P5/P6 (export models)
81 Dodge D9X, a D8X appears in parts manuals)
Chrysler Kew (UK)
1939n/aPlymouth P7/P8 (export models, 273 built plus 38 Dodge D12 and some DeSoto-badged P8s)
Chrysler Kew (UK)
194070Plymouth P9 (export models, one built)
205 cu in (3,365 cc)1931-193267DeSoto Series SA3+14 in (82.6 mm)4+18 in (104.8 mm)
208 cu in (3,409 cc)192858Dodge Standard Six (140/141/J)3+38 in (85.7 mm)3+78 in (98.4 mm)
1929-193063Dodge Series DA
212 cu in (3,467 cc)193168Dodge Series DH3+14 in (82.6 mm)4+14 in (108.0 mm)
193274Dodge Series DH
218 cu in (3,568 cc)193178Chrysler Series CM-64+38 in (111.1 mm)
193278Chrysler Series CM-6
193275DeSoto Series SC
193279Dodge Series DL
193382DeSoto S-All
193482Dodge Series DR/DRXX
87Dodge Series DR (opt.)/DS (std.)
193587Dodge Series DU
193687Dodge Series D2
193787Dodge Series D5
193887Dodge Series D8
193987Dodge Series D11/D11S
194087Dodge Series D14/D17
Dodge Series D15 (US-made for export)
194191Dodge Series D19
Dodge Series D20 (US-made for export)
194295Plymouth S-All
194295Dodge Series D23 (US-made for export)
1946-194995Plymouth S-All
194997Plymouth S-All
195097Plymouth S-All
195197Plymouth S-All
195297Plymouth S-All
1953100Plymouth S-All
1954100Plymouth S-All (Early)
218 cu in (3,573 cc)1939n/aDodge D11 (Canada-made)3+38 in (85.7 mm)4+116 in (103.2 mm)
194084.25Dodge Series D14/D15 (Canada-made)
1940n/aPlymouth P9/P10 (Canada-made)
194188Dodge Series D20/D21 (Canada-made)
194188Plymouth P11/P12 (Canada-made)
194295Dodge Series D23 (Canada-made)
194288Plymouth P14 (Canada-made)
224 cu in (3,671 cc)192860Dodge Senior Six (Series 2249)3+14 in (82.6 mm)4+12 in (114.3 mm)
192868Dodge Senior Six (Series 2251/2252)
193282Chrysler Series CI
Chrysler Kingston (UK)
193383 (std.)
89 (opt.)
Chrysler Series CO
Chrysler Kingston (UK)
228 cu in (3,738 cc)193793DeSoto Series S-3
Chrysler Richmond (UK; 1937–1938)
3+38 in (85.7 mm)4+14 in (108.0 mm)
193793 (std.)
100 (opt.)
Chrysler Series C-16
193893 (std.)
100 (opt.)
DeSoto Series S-5
1939DeSoto Series S-6
1940100 (std.)
105 (opt.)
DeSoto Series S-7
1941100
105
110
DeSoto Series S-8 DeLuxe
DeSoto Series S-8 Custom
DeSoto Series S-8 (optional)
230 cu in (3,772 cc)1942105Dodge Series D223+14 in (82.6 mm)4+58 in (117.5 mm)
1946-1949102Dodge S-All
1949103Dodge S-All
1950103Dodge S-All
1951103Dodge S-All
1952103Dodge S-All
1953103Dodge S-D-46, D-47
1954110Plymouth S-All (from February 26[9])
1954110Dodge S-All I-6
1955117Plymouth S-All I-6
1955123Dodge S-Coronet I-6
1956125Plymouth S-all exc Fury, Belvedere cvt
1956131Plymouth O-all exc Fury, Belvedere cvt
1956131Dodge S-Coronet I-6
1957-1958115Chrysler Royal/Chrysler Plainsman AP1 (AUS-made)
1957132Plymouth S-All exc Fury, Belvedere, cvt
1957138Dodge S-Coronet I-6
1958132Plymouth S-All exc Fury, Belvedere cvt
1958138Dodge S-Coronet I-6
1959132Plymouth S-Savoy, Belvedere, Suburban exc. Custom 9P, Fury, Sport Fury
1959138Dodge S-Coronet I-6
237 cu in (3,878 cc)1942115DeSoto Series S-103+716 in (87.3 mm)4+14 in (108.0 mm)
1946-1949109DeSoto S-All
1949112DeSoto S-All
1950112DeSoto S-All
242 cu in (3,958 cc)192978Dodge Series S3+38 in (85.7 mm)4+12 in (114.3 mm)
193078Dodge Series DB
1934100DeSoto Series SE (aka Chrysler CY/Croydon, until 1936 in UK)
193493 (std.)
100 (opt.)
Chrysler Series CA/CB
193593DeSoto Series SF
100DeSoto Series SG
1935100Chrysler O-C-6
193593Chrysler S-C-6
193693DeSoto Airstream Series S-1
100DeSoto Airflow Series S-2
193693 (std.)
100 (opt.)
Chrysler Series C-7
193895 (std.)
102 (opt.)
Chrysler Series C-18
1939100 (std.)
107 (opt.)
Chrysler Series C-22
1940108 (std.)
112 (opt.)
Chrysler Royal/Windsor
1941108
112
115 (opt.)
Chrysler Royal
Chrysler Windsor
Chrysler Royal/Windsor
249 cu in (4,078 cc)192875 (std.)
85 (opt.)
Chrysler Series 723+14 in (82.6 mm)5 in (127.0 mm)
192975 (std.)
84 (opt.)
Chrysler Series 75
251 cu in (4,106 cc)1942120Chrysler Royal/Windsor (C-34)3+716 in (87.3 mm)4+12 in (114.3 mm)
1946-1949114Chrysler Royal/Windsor (C38)
1949116Chrysler Royal/Windsor (C45)
1950116Chrysler Royal/Windsor (C48)
1951-1952116DeSoto Deluxe/Custom (S15)
1951116Chrysler Windsor, Deluxe (C51)
1953116DeSoto Powermaster (S18)
1954116DeSoto Powermaster (S20)
1957-1958117Chrysler Royal/Chrysler Plainsman AP1 (AUS-made)
1958-1959117Chrysler Plainsman AP2 (AUS-made)
1958-1960117Chrysler Royal/Chrysler Wayfarer AP2 (AUS-made)
1960-1961117Chrysler Wayfarer AP3 (AUS-made)
1960-1964117Chrysler Royal AP3 (AUS-made)
264.5 cu in (4,334 cc)1952119Chrysler Windsor, Deluxe (C51)3+716 in (87.3 mm)4+34 in (120.7 mm)
1953Chrysler Windsor, Deluxe (C60)
1954Chrysler Windsor Deluxe (C62)
268 cu in (4,398 cc)1930-193293Chrysler Series 703+38 in (85.7 mm)5 in (127.0 mm)
1930Chrysler Series 77
310 cu in (5,074 cc)1928100 (std.)
112 (opt.)
Chrysler Imperial Series 80L3+58 in (92.1 mm)
1929-1930Chrysler Imperial Series L-80

Straight-8

The 323.5 cuin straight-eight in a 1937 Chrysler Airflow
DisplacementYearsHorsepowerApplicationsBoreStroke
208 cu in (3,404 cc)1930-193170DeSoto Series CF2+78 in (73.0 mm)4 in (101.6 mm)
221 cu in (3,617 cc)1930-193275Dodge Series DC (discontinued September 1931)4+14 in (108.0 mm)
1931-193277DeSoto Series CF
240 cu in (3,938 cc)1931-193284Dodge Series DG3 in (76.2 mm)
193180Chrysler Series CD (until January 1931)
261 cu in (4,273 cc)193188Chrysler Series CD (from January 1931)3+18 in (79.4 mm)
274 cu in (4,486 cc)193390 (std.)
98 (opt.)
Chrysler Series CT3+14 in (82.6 mm)4+18 in (104.8 mm)
1935105 (std.)
110 (opt.)
Chrysler Series CZ
1936Chrysler Series C-8
1937110 (std.)
115 (opt.)
Chrysler Series C-14
282 cu in (4,622 cc)1931100Chrysler DeLuxe CD Series4+14 in (108.0 mm)
1932100Chrysler Series CD
193290 (std.)
100 (opt.)
Dodge Series DK
1933100 (std.)
94 (opt.)
Dodge Series DO
299 cu in (4,894 cc)1932100Chrysler Series CP (Chrysler Hurlingham in the UK)4+12 in (114.3 mm)
1933100 (std.)
108 (opt.)
Chrysler Series CQ
1934122Chrysler Series CU
1938110 (std.)
122 (opt.)
Chrysler Series C-19
Dodge Custom Eight (UK)[10]
324 cu in (5,302 cc)1934130Chrysler Series CV/CX4+78 in (123.8 mm)
1935115 (std.)
120 (opt.)
Chrysler Series C-1
130 (std.)
138 (opt.)
Chrysler Series C-2/C-3
1936115Chrysler Series C-9
130Chrysler Series C-10/C-11
1937130 (std.)
138 (opt.)
Chrysler Series C-15/C-17
1938130 (std.)
138 (opt.)
Chrysler Series C-20
1939130Chrysler Series C-23
132 (std.)
138 (opt.)
Chrysler Series C-24
1940132
135
143 (opt.)
Chrysler C-27
Chrysler C-26
Chrysler C-26/C-27
1941137Chrysler C-30
140Chrysler C-30 (opt.)/C-33
1942140Chrysler C-36/C-37
1946-1950135Chrysler Saratoga/New Yorker
385 cu in (6,306 cc)1931-1932125Chrysler Series CG3+12 in (88.9 mm)5 in (127.0 mm)
1932125Chrysler Series CH/CL
1933125 (std.)
135 (opt.)
Chrysler Series CL
1934-1935150Chrysler Series CW

See also

References

  1. Lee, John (1990). Standard Catalog of Chrysler, 1924-1990. Iola, WI: Krause Publications, Inc. p. 367. ISBN 0-87341-142-0.
  2. Lee, p. 375
  3. Pripps, Robert N. (2001). The big book of Massey tractors. Vancouver: Raincoast Books. ISBN 1-55192-423-4. OCLC 46991918.
  4. Berndt, Thomas (1993). Standard Catalog of U.S. Military Vehicles. Krause Publications. p. 193. ISBN 0-87341-223-0.
  5. Sedgwick, Michael; Gillies, Mark (1989). A-Z of Cars of the 1930s. Bideford, Devon, UK: Bay View Books. p. 70. ISBN 1-870979-38-9.
  6. Sedgwick, p. 69
  7. Lee, p. 368
  8. Lee, p. 370
  9. Zavitz, R. Perry (1990). "The Postwar Plymouths Changing Personalities From Staid to Flashy". In Lee, John (ed.). Standard Catalog of Chrysler, 1924-1990. Iola, WI: Krause Publications, Inc. p. 119. ISBN 0-87341-142-0.
  10. Sedgwick, p. 72
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