Chrysler flathead engine

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

Straight-4

Chrysler introduced a straight-four in 1926 when the Maxwell Motor Corporation was re-organised into the Chrysler Corporation in 1925. Initially used by Chrysler, the straight-four was fitted to Plymouth cars and Dodge light trucks beginning in 1929, lasting in production through 1933.

The original version displaced and produced 38 hp (28 kW). This was only produced in 1926, with displacement reduced to 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 subjected to a major redesign and enlarged to with the power rating remaining the same. It was also used in Dodge light trucks in 1929–1930. The engine was enlarged again to in 1930 with 48 hp (36 kW), 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 reduced further, 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.

{| class=wikitable

!Displacement!!Year(s)!!Horsepower!!Applications!!Bore!!Stroke

|||1926||38||Chrysler model F-58||rowspan=14|||

|rowspan=3|||1927||38||Chrysler Series 50||rowspan=3|

|1928||38-45||Chrysler Series 52

|1928||45||Plymouth Model Q

|rowspan=3|||1929||45||Plymouth U||rowspan=3|

|1929||45||Dodge 1/2 Ton

|1930||45||Dodge U1-A/B/C

|rowspan=7|||1930||48||Plymouth 30U||rowspan=9|

|1931||56||Plymouth PA

|1931||48||Dodge UF-10, U1-B/C

|1932||65||Plymouth PB

|1932||48||Dodge E, UF-10, U1-B/C

|1932||65||Dodge DM (export model)

|1933||48||Dodge UF10, UG20/21

|||1931||n/a||Plymouth PAX (export model, 89 built)||

|||1932||n/a||Plymouth PBX (export model, 58 built)

Beginning in 1938, the straight-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 . In 1940, Chrysler's straight six went into Massey's 201 Super, which lasted until 1942.

The last automotive use of the Chrysler flathead straight-six was in 1968 (in the Dodge Power Wagon WM300, its last year of production, which used the 251 cu in variant ). It was replaced throughout Chrysler products by the much more efficient OHV Slant-6 released in 1960, which appeared in most Dodge trucks starting in 1961. The flathead remained in production until the early 1970s for industrial and agricultural use.

{| class=wikitable

!Displacement!!Years!!Horsepower!!Applications!!Bore!!Stroke

|||1924-1925||68||Chrysler B-70 Six || ||

|rowspan=2|||1926||92||Chrysler Series E-80 || rowspan=2||| rowspan=2|

|1927-1928||92||Chrysler Series 80

|rowspan=5|||1926||68||Chrysler Model G-70 || rowspan=5||| rowspan=5|

|1927||68||Chrysler Series 70

|1930||75||Chrysler Series 70 (early)

|1930||68||Chrysler Series 66 (late)

|1931||68||Chrysler Series 66

|rowspan=2|||1927||54||Chrysler Series 60 || rowspan=6 ||| rowspan=2 |

|1928||54 (std.) 60 (opt.)||Chrysler Series 62

|rowspan=4|||1929||55||DeSoto Series K || rowspan=12|

|1930||57||DeSoto Series K

|1932||n/a||Chrysler Richmond (CIX; UK only)

|1933||n/a||Chrysler Richmond (COX; UK only)

|rowspan=4|||1930-1932||61||Dodge Series DD || rowspan=4|

|1933||70||Dodge Series DQ (CDN/export)

|1930-1931||60||DeSoto Series CK

|1933||70 (std.) 76 (opt.)||Plymouth PC/PCXX/PD

|rowspan=4|||1930||n/a||DeSoto Series CK (UK) || rowspan=4|

|1930||n/a||Dodge Series DD (UK)

|1931-1932||n/a||DeSoto Series SAX (export, late cars sold as "Chrysler Light Six")

|1933||n/a||Plymouth PCX/PCXXPDX/Chrysler Kew/Wimbledon (export models, 651 built)

|rowspan=3|||1929||65 (std.) 72 (opt.)||Chrysler Series 65 || rowspan=3||| rowspan=3|

|1930||62||Chrysler Series 66 (until Feb. 1930, longer in UK)

|1930-1931||62||Chrysler Series CJ

|rowspan=4|||1938||n/a||Plymouth P5/P6 (Canada-made, late introduction) || rowspan=4 | || rowspan=4|

|1938||n/a||Dodge Series D9/D10 (Canada-made, late introduction)

|1939||n/a||Plymouth P7/P8 (Canada-made)

|1939||n/a||Dodge Series D12/D13 (Canada-made)

|rowspan=20|||1933||75 (std.) 81 (opt.)||Dodge Series DP || rowspan=20||| rowspan=44 |

|rowspan=2|1934||77||Dodge Series DT (CDN/export)

|77 (std.) 82 (opt.)||Plymouth PE/PF/PFXX/PG Chrysler Wimbledon (UK)

|rowspan=2|1935||rowspan="2"|82||Dodge Series DV/DV-6 (CDN/export)

|Plymouth Model PJ Chrysler Wimbledon (UK)

|rowspan=2|1936||rowspan="2"|82||Dodge Series D-3/D-4 (CDN/export)

|Plymouth P1/P2 Chrysler Wimbledon (UK)

|rowspan="3"|1937||82||Dodge Series D6/D7 (CDN/export)

|82 (std.) 65 (Economy)||Plymouth P3/P4 Chrysler Kew/Wimbledon (UK)

|70||Plymouth PT50 (commercials)

|rowspan="3"|1938||82||Dodge Series D9/D10 (CDN/export)

|82 (std.) 65 (Economy) 86 (opt.)||Plymouth P5/P6 Chrysler Kew/Wimbledon (UK)

|70||Plymouth PT57 (commercials)

|rowspan="3"|1939||82||Dodge Series D12 (export)

|82 (std.) 86 (opt.)||Plymouth P7/P8 Chrysler Kew/Wimbledon (UK)

|70||Plymouth PT81 (commercials)

|rowspan="2"|1940||84 (std.) 87 (opt.)||Plymouth P9/P10

|79||Plymouth PT105 (commercials)

|rowspan="2"|1941||87 (std.) 92 (opt.)||Plymouth P11/P12

|82||Plymouth PT125 (commercials)

|rowspan=24|||1931||n/a||Dodge Series DH (UK) Chrysler Kew/Wimbledon (UK)

|1935||n/a||Dodge Series DUX Victory (UK)

|1935||n/a||Plymouth PJX (export models, 754 built) Chrysler Kew (UK)

|1936||n/a||Dodge Series D2X Victory (UK)

|1936||n/a||Plymouth P1X/P2X (export models, 661 built with P2X engine code, plus 35 Dodge D-3/D-4) Chrysler Kew (UK)

|1937||n/a||Desoto Series S3X (export models)

|1937||n/a||Dodge Series D5X (UK)

|1937||n/a||Plymouth P3X/P4X (export models, 657 built with P4X engine code, plus 39 Dodge D6X) Chrysler Kew (UK)

|1938||n/a||Desoto Series S5X (export models)

|1938||n/a||Dodge Series D8X (export models)

|1938||n/a||Plymouth P5X/P6X (export models, 333 built with P6X engine code) 81 Dodge D9X) Chrysler Kew (UK)

|1939||n/a||Desoto Series S6X (export models)

|1939||n/a||Dodge Series D11X (export model, unknown production)

|1939||n/a||Plymouth P7/P8 (export models, 273 built plus 38 Dodge D12X and some DeSoto-badged SP7X/SP8X) Chrysler Kew (UK)

|1940||n/a||Dodge Series D14X (export models none built)

|1940||70||Plymouth P9X/P10X (export models, one built/none built)

|1941||n/a||Dodge Series D19X (export models, unknown production)

|1941||n/a||Plymouth P11X/P12X (export models, unknown production)

|rowspan=2|||1927-1928||58||Dodge Standard Six (140/141/J) Dodge Victory Six (130/131/M) || rowspan=2 | || rowspan=2 |

|1929-1930||63||Dodge Series DA

|rowspan=2|||1931||68||Dodge Series DH || rowspan=25 | || rowspan=2 |

|1932||74||Dodge Series DH

|rowspan=23|||1931||78||Chrysler Series CM-6 || rowspan=23 |

|1932||78||Chrysler Series CM-6

|1932||75||DeSoto Series SC

|1932||79||Dodge Series DL

|1933||82||DeSoto S-All

|rowspan=2|1934||82||Dodge Series DR/DRXX

|87||Dodge Series DR (opt.)/DS (std.)

|1935||87||Dodge Series DU

|1936||87||Dodge Series D2

|1937||87||Dodge Series D5

|1938||87||Dodge Series D8

|1939||87||Dodge Series D11/D11S

|1940||87||Dodge Series D14/D17 Dodge Series D15 (US-made for export)

|1941||91||Dodge Series D19 Dodge Series D20 (US-made for export)

|1942||95||Plymouth S-All

|1942||95||Dodge Series D23 (US-made for export)

|1946-1949||95||Plymouth S-All

|1949||97||Plymouth S-All

|1950||97||Plymouth S-All

|1951||97||Plymouth S-All

|1952||97||Plymouth S-All

|1953||100||Plymouth S-All

|1954||100||Plymouth S-All (Early)

|rowspan=12|||1939||n/a ||Dodge D11 (Canada-made) || rowspan=12 | || rowspan=12|

|1940||84.25||Dodge Series D14/D15 (Canada-made)

|1940||n/a||Plymouth P9/P10 (Canada-made)

|1941||88||Dodge Series D20/D21 (Canada-made)

|1941||88||Plymouth P11/P12 (Canada-made)

|1942||88||Dodge Series D23 (Canada-made)

|1942||88||Plymouth P14 (Canada-made)

|1946-early 1949||95||Plymouth P15S & P15C (Canada-made) Dodge D25S & D25S (Canada-made)

|1949||97||Plymouth P17 & P18 (Canada-made) Dodge D31 & D32 (Canada-made)

|1950||97||Plymouth P22 & P23 (Canada-made) Dodge D35 & D36 (Canada-made)

|1951-1952||97||Plymouth P22 & P23 (Canada-made) Dodge D39 & D40 (Canada-made)

|1953||97||Plymouth P24-1, P24-2 & P24-3 (Canada-made) Dodge D49-1 & D49-2 (Canada-made)

|rowspan=4|||1927-1928||60||Dodge Senior Six (Series 2249) || rowspan=4 | || rowspan=4 |

|1928||68||Dodge Senior Six (Series 2251/2252)

|1932||82||Chrysler Series CI Chrysler Kingston (UK)

|1933||83 (std.) 89 (opt.)||Chrysler Series CO Chrysler Kingston (UK)

|rowspan=14|||1937||93||DeSoto Series S-3 Chrysler Richmond (UK; 1937–1938) || rowspan=14 | || rowspan=14 |

|1937||93 (std.) 100 (opt.)||Chrysler Series C-16

|1938||rowspan=2|93 (std.) 100 (opt.)||DeSoto Series S-5

|1939||DeSoto Series S-6

|1940||100 (std.) 105 (opt.)||DeSoto Series S-7 DeSoto Series S-7S (Canada-made)

|1941||100 105 110||DeSoto Series S-8 DeLuxe DeSoto Series S-8 Custom DeSoto Series S-8 (optional)

|1942||105||Dodge D22C (Canada-made)

|1946-Early 1949||105||Dodge D24 (Canada-made)

|1949||105||Dodge D30 Custom (Canada-made)

|1950||105||Dodge D34 Custom (Canada-made)

|1951-1952||105||Dodge D42 Coronet (Canada-made)

|1953||115 101 (bhp)||Dodge D43-1, D43-2 & D43-3 (Canada-made w/ Hy-Drive) Dodge D43 (Australia-built)

|1954||115||Plymouth P25-1, P25-2 & P25-3 (Canada-made) Dodge D49-1 & D49-2 (Canada made)

|1955||115||Plymouth P26-1, P26-2 & P26-3 (Canada-made, w/ manual transmission) Dodge D54-1, D54-2 & D54-4 (Canada-made, w/ manual transmission)

|rowspan=21|||1942||105||Dodge Series D22 || rowspan=21 | || rowspan=21 |

|1946-1949||102||Dodge S-All

|1949||103||Dodge S-All

|1950||103||Dodge S-All

|1951||103||Dodge S-All

|1952||103||Dodge S-All

|1953||103||Dodge S-D-46, D-47

|1954||110||Plymouth S-All (from February 26)

|1954||110||Dodge S-All I-6

|1955||117||Plymouth S-All I-6

|1955||123||Dodge S-Coronet I-6

|1956||125||Plymouth S-all exc Fury, Belvedere cvt

|1956||131||Plymouth O-all exc Fury, Belvedere cvt

|1956||131||Dodge S-Coronet I-6

|1957-1958||115||Chrysler Royal/Chrysler Plainsman AP1 (AUS-made)

|1957||132||Plymouth S-All exc Fury, Belvedere, cvt

|1957||138||Dodge S-Coronet I-6

|1958||132||Plymouth S-All exc Fury, Belvedere cvt

|1958||138||Dodge S-Coronet I-6

|1959||132||Plymouth S-Savoy, Belvedere, Suburban exc. Custom 9P, Fury, Sport Fury

|1959||138||Dodge S-Coronet I-6

|rowspan=5|||1942||115||DeSoto Series S-10 || rowspan=5| || rowspan=5|

|1946-1949||109||DeSoto S-All

|1949||112||DeSoto S-All

|1950||112||DeSoto S-All

|1951||112||DeSoto S-All

|rowspan=15|||1929||78||Dodge Series S || rowspan=15 | || rowspan=15 |

|1929-1930||78||Dodge Series DB

|1934||100||DeSoto Series SE (aka Chrysler CY/Croydon, until 1936 in UK)

|1934||93 (std.) 100 (opt.)||Chrysler Series CA/CB

|rowspan=2|1935||93||DeSoto Series SF

|100||DeSoto Series SG

|1935||100||Chrysler O-C-6

|1935||93||Chrysler S-C-6

|rowspan=2|1936||93||DeSoto Airstream Series S-1

|100||DeSoto Airflow Series S-2

|1936||93 (std.) 100 (opt.)||Chrysler Series C-7

|1938||95 (std.) 102 (opt.)||Chrysler Series C-18

|1939||100 (std.) 107 (opt.)||Chrysler Series C-22

|1940||108 (std.) 112 (opt.)||Chrysler Royal/Windsor

|1941||108 112 115 (opt.)||Chrysler Royal Chrysler Windsor Chrysler Royal/Windsor

|rowspan=2|||1928||75 (std.) 85 (opt.)||Chrysler Series 72 || rowspan=2 | || rowspan=2 |

|1929||75 (std.) 84 (opt.)||Chrysler Series 75

|rowspan=13|||1942||120||Chrysler Royal/Windsor (C-34) || rowspan=13 | || rowspan=13 |

|1946-1949||114||Chrysler Royal/Windsor (C38)

|1949||116||Chrysler Royal/Windsor (C45)

|1950||116||Chrysler Royal/Windsor (C48)

|1951-1952||116||DeSoto Deluxe/Custom (S15)

|1951||116||Chrysler Windsor, Deluxe (C51)

|1953||116||DeSoto Powermaster (S18)

|1954||116||DeSoto Powermaster (S20)

|1957-1958||117||Chrysler Royal/Chrysler Plainsman AP1 (AUS-made)

|1958-1959||117||Chrysler Plainsman AP2 (AUS-made)

|1958-1960||117||Chrysler Royal/Chrysler Wayfarer AP2 (AUS-made)

|1960-1961||117||Chrysler Wayfarer AP3 (AUS-made)

|1960-1964||117||Chrysler Royal AP3 (AUS-made)

|rowspan=3|||1952||rowspan=3|119||Chrysler Windsor, Deluxe (C51) || rowspan=3 | || rowspan=3 |

|1953||Chrysler Windsor, Deluxe (C60)

|1954||Chrysler Windsor Deluxe (C62)

|rowspan=2|||1930-1932||rowspan=2|93||Chrysler Series 70 || rowspan=2 | || rowspan=6 |

|1930||Chrysler Series 77

|rowspan=2|||1926||rowspan=2 | 92 ||Chrysler Imperial Series E-80 || rowspan=2 |

|1927||Chrysler Imperial Series 80

|rowspan=2|||1928||rowspan=2 | 100 (std.) 112 (opt.)||Chrysler Imperial Series 80L || rowspan=2 |

|1929-1930||Chrysler Imperial Series L-80

|rowspan=4|||1937-1940||100||Dodge ML/RL-50/53, Dodge MK/RK-60/63, Dodge RX-70/71, Dodge DB8, Dodge VL/VLA-50, Dodge VK/VKA-60/63|| rowspan=8 | || rowspan=4 |

|1940-1942||110||Dodge DC8, DD-8 Dodge WK, WL

|1946-1953||128 (std.)||Dodge WK/WR, Dodge B-1-T/TA/V/VA, Dodge B-2/3/4-T/TL/TA/TAL, Dodge B-2/3/4-V/VL/VA/VAL, Dodge B-1/2/3-VX, Dodge DE/DF/DG-8/9, Dodge DH-9/10

|1951-1953||145 (2 carb. opt.)||Dodge B-2/3/4-T/TL/TA/TAL, Dodge B-2/3/4-V/VL/VA/VAL, Dodge B-1/2/3-VX, Dodge DG-8/9, Dodge DH-9/10

|rowspan=2|||1946-1947||115||Dodge WJ||rowspan=2|

|1948-1949||115||Dodge B-1-R/RA/RS, Dodge DE-7

|rowspan=2|||1950-1953||122 (std.)||Dodge B-2/3/4-R/RL/RA/RAL/RS, Dodge DF/DG-7, DH-8||rowspan=2|

|1951-1953||137 (2 carb. opt.)||Dodge B-2/3/4-R/RL/RA/RAL/RS, Dodge DG-7, DH-8

|||1950-1953|| 154 std. w/2 carb. ||Dodge B-2/3/4-Y/YA/YX || ||

|||1954-1956|| 171 std. w/2 carb. ||Dodge C-1-Y/YA/YX, Dodge DH-11/12, Dodge C-3-Y6/YL6/YA6/YAL6/YX6/YXL6 || ||

Straight-8

thumb|The 323.5 cuin straight-eight in a 1937 [[Chrysler Airflow]]

The new straight-8 engine is largely based on the six-cylinder engine that appeared on the Desoto Model K. It has five main bearings, the central one being wider.

|rowspan=14|||1934||130||Chrysler Imperial/Custom Imperial Series CV/CX ||rowspan=14|

|rowspan=2|1935||115 (std.) 120 (opt.)||Chrysler Series C-1

|130 (std.) 138 (opt.)||Chrysler Imperial Series C-2/C-3

|rowspan=2|1936||115||Chrysler Series C-9

|130||Chrysler Imperial Series C-10/C-11

|1937||130 (std.) 138 (opt.)||Chrysler Imperial Custom/Airflow Series C-15/C-17

|1938||130 (std.) 138 (opt.)||Chrysler Custom Imperial Series C-20

|rowspan=2|1939||130||Chrysler Series C-23

|132 (std.) 138 (opt.)||Chrysler Series C-24

|1940||132 135 143 (opt.)||Chrysler C-27 Chrysler C-26 Chrysler C-26/C-27

|rowspan=2|1941||137||Chrysler C-30

|140||Chrysler C-30 (opt.)/C-33

|1942||140||Chrysler C-36/C-37

|1946-1950||135||Chrysler Saratoga/New Yorker/Imperial

|rowspan=4|||1931-1932||125||Chrysler Series CG||rowspan=4| ||rowspan=4|

|1932||125||Chrysler Imperial/Custom Imperial CH/CL

|1933||125 (std.) 135 (opt.)||Chrysler Custom Imperial CL

|1934-1935||150||Chrysler Custom Imperial Series CW

Chrysler flathead engine

Straight-4

Straight-8

See also

References