1940 DESOTO

Model Designations:

DeSoto, Series S-7, 6 Cylinder

Model Lines:

DeLuxe Line

Long Wheelbase DeLuxe Line

Custom Line

Long Wheelbase Custom Line

Body Styles & Prices:

DeSoto, Series S-7, DeLuxe Line

2 Door Business Coupe, 2 Passenger,

Base Price: $845; Shipping Weight: 3,001 Pounds; Production Total: 3,650

2 Door Auxiliary Seat Coupe, 2/4 Passenger,

Base Price: $905; Shipping Weight: 3,026 Pounds; Production Total: 2,098

2 Door Trunk Sedan, 5 Passenger,

Base Price: $905; Shipping Weight: 3,066 Pounds; Production Total: 7,072

4 Door Trunk Sedan, 5 Passenger,

Base Price: $945; Shipping Weight: 3,086 Pounds; Production Total: 18,666

DeSoto, Long Wheelbase (139.5"), Series S-7, DeLuxe Line

4 Door Trunk Sedan, 7 Passenger,

Base Price: $1,175; Shipping Weight: 3,490 Pounds; Production Total: 142

4 Door California Taxi, 7 Passenger

Base Price: $ NA; Shipping Weight: NA; Production Total: 2,323

DeSoto, Series S-7, Custom Line

2 Door Business Coupe, 2 Passenger

Base Price: $885; Shipping Weight: 3,024 Pounds; Production Total: 1,898

2 Door Custom Auxiliary Seat Coupe, 2/4 Passenger,

Base Price: $945; Shipping Weight: 3,044 Pounds; Production Total: 2,234

2 Door Convertible Club Coupe, 4 Passenger

Base Price: $1,095; Shipping Weight: 3,329 Pounds; Production Total: 1,085

2 Door Trunk Sedan, 5 Passenger

Base Price: $945; Shipping Weight: 3,084 Pounds; Production Total: 3,109

4 Door Trunk Sedan, 5 Passenger

Base Price: $985; Shipping Weight: 3,104 Pounds; Production Total: 25,221

DeSoto, Long Wheelbase (139.5"), Series S-7, Custom Line

4 Door Trunk Sedan, 7 Passenger

Base Price: $1,215; Shipping Weight: 3,490 Pounds; Production Total: 206

4 Door Limousine Sedan, 7 Passenger

Base Price: $1,290; Shipping Weight: 3,635 Pounds; Production Total: 34

Chasis: Production Total: 52

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General Specifications:

Wheelbase: 122-1/2"

Engine Bore & Stroke: 3-3/8" X 4-1/4"

Engine Displacement: 228.1 Cu. In.

Compression Ratio: 6.5:1, Optional: 6.8:1

Taxable Horsepower: 27.34

Horsepower: 100 @ 3,600 RPM; Optional: 105 @ 3,600 RPM

Torque: 176 Ft Lbs @ 1,200 RPM, Optional: 178 Ft Lbs @ 1,200 RPM

Carburetor: Ball & Ball, 2V Model E6N2

Rear Axle Ratio: 4.11:1

Tire Size: 6.00 X 16", Pressures: 28 Front & Rear

Tune Up Data

Spark Plug Type:

Regular Heads: Champion J-8, J-11, or Equivalent

Aluminum Heads: Champion J-9 (Long Reach), H-10, or Equivalent

Spark Plug: Gap .025;

Point Gap: .020

Distributor Cam Angle: 38 degrees

Ignition Timing: 2nd Line Before TDC on Vibration Damper

Firing Order: 153624

Tappet Clearance, Hot: Intake .008, Exhaust .010

Cylinder Head Torque: 65-70 Ft Lbs

Capacities

Both Horsepower Engines

Cooling System: 17 Quarts

Fuel Tank: 17 Gallons;

Engine Oil Refill: 5 Quarts;

Grade of Oil: Above +32F 20;

Above +10F 20W;

Above -10F 10W

Manual Transmission: 2-3/4 Pints, Without Overdrive

4 Pints, With Overdrive

Grade of Oil: Summer 90, Winter 90, Without Overdrive

Summer & Winter 50, With Overdrive

Rear Axle: 3-1/4 Pints

Grade of Oil: Summer 90H, Winter 90H

1940 DESOTO

Valve Specifications

Both Engines

Tappet Clearance, Running Hot: Intake .008; Exhaust .010

Clearance for Timing: Intake: .014; Exhaust: .014

Valve Timing:

Intake Opens 12 Degrees Before Top Dead Center

Exhaust Closes 6 degrees After Top Dead Center

Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,

Valve Spring Pressure: 40 Lbs @ 1-3/4 inches (New Springs)

Valve Stem Clearance: Intake .0015-.0035;

Exhaust .0015-.0035

Piston & Ring Data

Both Engines

Piston Removal: From Above

Piston Clearance (Minimum):

Top Land Inch .0115;

Top of Skirt, Inch: .0005"

Fitting Pistons with Spring Scale:

Shim Thickness: .002"

Pounds Pull on Scale: 5 to 7

Width of Ring End Gap (Minimum):

Compression Ring: .007

Oil Ring: .007

Clearance Between Ring & Grooves:

Compression Ring: .0025-.004 Top Ring; .002-.0035 Second Ring

Oil Control Ring: .001-.0025

Engine Bearing Data

Both Engines

Camshaft End Play: .002-.006

Camshaft Bearing Clearance: .001-.003

Rod Journal Diameter: 2.124-2.125 Inches

Rod Bearing Clearance: .0005-.0025 inches

Rod End Play: .006-.011 inches

Rod Bolt Tension: 45-50 Lbs. Ft.

Main Bearing Journal Diameter: 2.499"-2.500"

Main Bearing Clearance: .001 -.002 inch

Crankshaft End Play: .003-.007 Inch

Main Bolt Tension: 75-80 Lbs. Ft.

Beginning Engine Numbers:

Series S-7: S7-1001

Beginning Serial Numbers:

Series S-7 DeLuxe: 6064301

Series S-7 Custom: 5688001

Brake Specifications

Lining Material: Molded

Lining Dimensions/Wheel in Inches:

Length, 19-7/16",

Width, 2",

Thickness, 3/16"

Pedal Free Play: 5/16"

Wheel Alignment Specifications

Caster: Zero Degrees

Camber: +3/8 Degrees

Toe In: 1/16"

Kingpin Angle: 5-3/8 Degrees

Rear Axle Data

Ring Gear & Pinion Backlash: .006-.010 inch

Drive Pinion Adjustment: Shims

Drive Pinion Bearing Adjustment: Shims

Axle Shaft End Play: .003-.008 inch

Auto-Lite Distributor Specifications

Distributor #1GS-4108-1

Cam Angle: 38 Degrees

Breaker Point Opening: .020"

Condenser Capacity: .25-.28 Mfds

Breaker Arm Spring Tension: 17-20 Ounces

Centrifugal Advance Data:

Advance Starts: 3 Degrees @ 400 RPM

Full Advance: 12 Degrees @ 1,750 RPM

Vacuum Advance Data:

Advance Starts: 1 Degrees @ 6-1/2" Vacuum

Full Advance: 7 Degrees @ 15" Vacuum

Auto-Lite Generator Specifications

Generator # GDZ-4801A

Brush Spring Tension:

Main Brush: 35-53 Ounces

Direction of Rotation: Clockwise

Field Current @ 6 Volts: 1.60-1.78 Amperes

Low Output Test: 8 Amperes, 7.6 Volts @ 1,250 RPM

Maximum Output: 35 Amperes, 8 Volts @ 2,000 RPM

Auto-Lite Regulator Specifications

Regulator Type: Voltage & Current

Part #VRP-4004A

Ground Polarity: Positive

Voltage to Close Relay Points: 6.4 to 6.6 Volts

Amperage to Open Relay Points: 4.1 Amperes

Maximum Operating Amperage: 34 to 36 Amperes

Maximum Operating Voltage @ 70 Degrees: 7.35 Volts

Starting Motor Specifications

Part #MAW-4016

Brush Spring Tension: 42-53 Ounces

No Load Test: 65 Amperes, 5.5 Volts @ 4,900 RPM

Lock Test: 670 Amperes, 4.0 Volts @ 18.0 Ft Lbs Torque

Carter Carburetor Specifications

Carburetor Model: BB

Part #E6P5

Casting # Stamped on Webbing of Bowl Cover or Attached Tag

Repair Kit # 1308A

Float Level: 5/64"

Idle Screw Setting: 1/2 to 1-1/2 Turns

Metering Rod Gauge: None

Pump Travel: 24/64" (Medium Stroke)

Carburetor Model: BB

Part #E6S1

Casting # Stamped on Webbing of Bowl Cover or Attached Tag

Repair Kit # 1076A

Float Level: 5/64"

Idle Screw Setting: 1/2 to 1-1/2 Turns

Metering Rod Gauge: None

Pump Travel: 26/64" (Medium Stroke)

Carburetor Model: BB

Part #E6N3

Casting # Stamped on Webbing of Bowl Cover or Attached Tag

Repair Kit # 1308A

Float Level: 5/64"

Idle Screw Setting: 1/2 to 1-1/2 Turns

Metering Rod Gauge: None

Pump Travel: 26/64" (Medium Stroke)

Carburetor Model: BB

Part #E6S3

Casting # Stamped on Webbing of Bowl Cover or Attached Tag

Repair Kit # 1077B

Float Level: 5/64"

Idle Screw Setting: 1/2 to 1-1/2 Turns

Metering Rod Gauge: None

Pump Travel: 26/64" (Medium Stroke)

Fuel Pump Data:

Pump Type: AT

Maximum Pressure: 4-1/4 PSI

Dash Gauge Manufacturer:

Gasoline: Auto-Lite

Temperature: Auto-Lite

Oil Pressure: Auto-Lite

Ammeter: Auto-Lite

Popular Options

White Wall Tires, Wheel Trim Rings, Side Mirrors, Vent Wings, Bumper Wing Guards, Fender Skirts, Bumper Guards, Radio, Heater, Clock, Cigar Lighter, Seat Covers, External Sun Shade, Spotlights, Fog Lamps, Dual Tone Horns, Overdrive, License Plate Frames.

1940 DeSoto Historical Data

Introduction of the 1940 DeSoto was in September 1939.

Total 1940 DeSoto Production was 83,805

Copyright 1999, Custom Solutions & Services