1940 NASH
Model Designations:
Nash, Ambassador "8," Series 4080, 8 Cylinder
Nash, Ambassador "Six," Series 4020, 6 Cylinder
Nash Lafayette, Series 4010, 6 Cylinder
Nash Ambassador 8, Series 4080, 8 Cylinder Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4080
Base Price: $1,195; Shipping Weight: 3,710 Pounds
2 Door Cabriolet, 3/5 Passenger, Model #4081
Base Price: $1,295; Shipping Weight: 3,640 Pounds
2 Door A-P Coupe, 3/5 Passenger, Model #4082
Base Price: $1,170; Shipping Weight: 3,575 Pounds
2 Door Sedan, 6 Passenger, Model #4083
Base Price: $1,165; Shipping Weight: 3,620 Pounds
2 Door Coupe, 3 Passenger, Model #4085
Base Price: $1,135; Shipping Weight: 3,555 Pounds
4 Door Sedan, 6 Passenger, Model #4088
Base Price: $1,195; Shipping Weight: 3,705 Pounds
Production Totals by Body Style are not available.
Nash Ambassador Six, Series 4020, 6 Cylinder, Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4020
Base Price: $985; Shipping Weight: 3,385 Pounds
2 Door Cabriolet, 3/5 Passenger, Model #4021
Base Price: $1,085; Shipping Weight: 3,410 Pounds
2 Door A-P Coupe, 3/5 Passenger, Model #4022
Base Price: $960; Shipping Weight: 3,295 Pounds
2 Door Sedan, 6 Passenger, Model #4023
Base Price: $955; Shipping Weight: 3,350 Pounds
2 Door Coupe, 3 Passenger, Model #4025
Base Price: $925; Shipping Weight: 3,290 Pounds
4 Door Sedan, 6 Passenger, Model #4028
Base Price: $985; Shipping Weight: 3,380 Pounds
Production Totals by Body Style are not available.
Nash Lafayette, Series 4010, 6 Cylinder, Body Styles
4 Door DeLuxe Sedan, 6 Passenger, Model #4010
Base Price: $875; Shipping Weight: 3,280 Pounds
2 Door DeLuxe Cabriolet, 3/5 Passenger, Model #4011
Base Price: $975; Shipping Weight: 3,310 Pounds
2 Door DeLuxe A-P Coupe, 3/5 Passenger, Model #4012
Base Price: $850; Shipping Weight: 3,190 Pounds
2 Door Sedan, 6 Passenger, Model #4013
Base Price: $845; Shipping Weight: 3,235 Pounds
2 Door Coupe, 3 Passenger, Model #4015
Base Price: $795; Shipping Weight: 3,190 Pounds
4 Door Sedan, 6 Passenger, Model #4018
Base Price: $875; Shipping Weight: 3,275 Pounds
Production Totals by Body Style are not available.
1940 NASH
Lafayette 6, Series 4010, General Specifications
Wheelbase: 117 Inches
Engine Type: Inline 6 Cylinder, L-Head
Bore & Stroke: 3-3/8" X 4-3/8"
Engine Displacement: 234.8 Cu. In.
Compresssion Ratio: 6.30 to 1
Taxable Horsepower: 27.34
Horsepower: 99 @ 3,400 RPM
Torque: 179 Ft Lbs @ 1,200 RPM
Rear Axle Ratio: 4.10:1
Carburetor: Carter 458S
Tire Size: 6.00 x 16 inches; Inflation Pressure, Front 28, Rear, 28
Ambassador 6, Series 4020, General Specifications
Wheelbase: 121 Inches
Engine Type: Inline 6 Cylinder, Overhead Valve
Bore & Stroke: 3-3/8" X 4-3/8"
Engine Displacement: 234.8 Cu. In.
Compresssion Ratio: 6.00 to 1
Taxable Horsepower: 27.35
Horsepower: 105 @ 3,400 RPM
Torque: 190 Ft Lbs @ 1,050 RPM
Rear Axle Ratio: 4.10:1
Carburetor: Carter 435S
Tire Size: 6.25 x 16 inches; Inflation Pressure, Front 27, Rear, 27
Ambassador 8, Series 4080, General Specifications
Wheelbase: 125 Inches
Engine Type: Inline 8 Cylinder, Overhead Valve
Bore & Stroke: 3-1/8" X 4-1/4"
Engine Displacement: 260.8 Cu. In.
Compresssion Ratio: 6.00 to 1
Taxable Horsepower: 31.25
Horsepower: 115 @ 3,400 RPM
Torque: 200 Ft Lbs @ 1,200 RPM
Rear Axle Ratio: 4.10:1
Carburetor: Carter 435S .
Tire Size: 7.00 x 15 inches; Inflation Pressure, Front 26, Rear, 26
Tune Up Specifications, Lafayette 6, Series 4010
Spark Plug: Gap .025"
Spark Plug Type: Champion 7, D-16, or Equivalent
Point Gap: .020"
Distributor Cam Angle: 38 Degrees
Ignition Timing: TDC Mark on Flywheel
Firing Order: 1-5-3-6-2-4
Tappet Clearance, Hot: Intake .015", Exhaust .015"
Cylinder Head Torque: 60 Ft Lbs
Tune Up Specifications, Ambassador 6, Series 4020
Spark Plug: Gap .025"
Spark Plug Type: Champion J-8, J-11, or Equivalent
Point Gap: .020"
Distributor Cam Angle: 35 degrees
Ignition Timing: "IGN" Mark on Vibration Damper
Firing Order: 1-5-3-6-2-4
Tappet Clearance, Hot: Intake .015", Exhaust .015"
Cylinder Head Torque: 65 Ft Lbs
Tune Up Specifications, Ambassador 8, Series 4080
Spark Plug: Gap .025"
Spark Plug Type: Champion J-8, J-11, or Equivalent
Point Gap: .017"
Distributor Cam Angle: 28 degrees
Ignition Timing: "IGN" Mark on Vibration Damper
Firing Order: 1-6-2-5-8-3-7-4
Tappet Clearance, Hot: Intake .015", Exhaust .015"
Cylinder Head Torque: 65 Ft Lbs
Valve Specifications, Lafayette, Series 4010, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .015"; Exhaust: .015"
Valve Timing:
Intake Valve Opens @ 21.5 Degrees Before Top Dead Center
Exhaust Valve Closes @ 36.5 Degrees After Top Dead Center
Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,
Valve Spring Pressure: 70 Lbs @ 2 inches (New Springs)
Valve Stem Clearance: Intake .002"-.004"
Exhaust .002"-.004"
Valve Specifications, Ambassador 6, Series 4020, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .015"; Exhaust: .015"
Valve Timing:
Intake Valve Opens @ 24.5 Degrees Before Top Dead Center
Exhaust Valve Closes @ 5 Degrees After Top Dead Center
Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,
Valve Spring Pressure: Inner Spring: 21 Pounds @ 1-3/8"
Outer Spring: 38 Pounds @ 1-11/16"
Combined Pressure: 59 Pounds
Valve Stem Clearance: Intake .002"-.004"
Exhaust .002"-.004"
Valve Specifications, Ambassador 8, Series 4080, 8 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .015"; Exhaust: .015"
Valve Timing: Intake Valve Opens, 20 Degrees Before Top Dead Center
Exhaust Valve Closes, 10 Degrees After Top Dead Center
Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,
Valve Spring Pressure: Inner Spring: 21 Pounds @ 1-3/8"
Outer Spring: 38 Pounds @ 1-11/16"
Combined Pressure: 59 Pounds
Valve Stem Clearance: Intake .002"-.004"
Exhaust .002"-.004"
Piston & Ring Data, Lafayette, Series 4010, 6 Cylinder
Piston Removal: From Above
Piston Clearance (Minimum):
Top Land Inch .020"
Top of Skirt, Inch: .001"
Fitting Pistons with Spring Scale:
Shim Thickness: .002"
Pounds Pull on Scale: 12 to 18
Width of Ring End Gap (Minimum):
Compression Ring: .010"
Oil Ring: .010"
Clearance Between Ring & Grooves:
Compression Ring: .002"-.004"
Oil Ring: .002"-.004"
Piston & Ring Data, Ambassador 6, Series 4020, 6 Cylinder
Piston Removal: Above
Piston Clearance (Minimum):
Top Land Inch .020"
Top of Skirt, Inch: .001"
Fitting Pistons with Spring Scale:
Shim Thickness: .002"
Pounds Pull on Scale: 12 to 18
Width of Ring End Gap (Minimum):
Compression Ring: .010"
Oil Ring: .010"
Clearance Between Ring & Grooves:
Compression Ring: .002"-.004"
Oil Ring: .002"-.004"
Piston & Ring Data, Ambassador 8, Series 4080, 8 Cylinder
Piston Removal: Below
Piston Clearance (Minimum):
Top Land Inch .018"
Top of Skirt, Inch: .0015"
Fitting Pistons with Spring Scale:
Shim Thickness: .0025"
Pounds Pull on Scale: 8 to 15
Width of Ring End Gap (Minimum):
Compression Ring: .010"
Oil Ring: .010"
Clearance Between Ring & Grooves:
Compression Ring: .002"-.004"
Oil Ring: .002"-.004"
Engine Bearing Data, All Series
Camshaft End Play: .004"-.006"
Camshaft Bearing Clearance: .001"-.003"
Rod Journal Diameter: 1.9995"-2.0005"
Rod Bearing Clearance: .0005"-.003"
Rod End Play: .006"-.012" inches
Rod Bolt Tension: 50-60 Lbs. Ft.
Main Bearing Journal Diameter: 2.4785"-2.4795"
Main Bearing Clearance: .0005" -.003"
Crankshaft End Play: .006"-.010"
Main Bolt Tension: 70 Lbs. Ft.
Capacities, Lafayette, Series 4010, 6 Cylinder
Cooling System: 18 Quarts
Fuel Tank: 20 Gallons;
Engine Oil Refill: 6 Quarts;
Grade of Oil: Above +32F 20;
Above +10F 20W;
Above -10F 10W
Manual Transmission: 3-1/2 Pints Without Overdrive: 6 Pints With Overdrive
Grade of Oil: Summer 70, Winter 50
Rear Axle: 4 Pints
Grade of Oil: Summer 90H, Winter 90H
Capacities, Ambassador 6, Series 4020, 6 Cylinder
Cooling System: 17 Quarts
Fuel Tank: 20 Gallons;
Engine Oil Refill: 6 Quarts;
Grade of Oil: Above +32F 20;
Above +10F 20W;
Above -10F 10W
Manual Transmission: 3-1/2 Pints Without Overdrive; 6 Pints With Overdrive
Grade of Oil: Summer 70, Winter 50
Rear Axle: 4 Pints
Grade of Oil: Summer 90H, Winter 90H
Capacities, Ambassador 8, Series 4080, 8 Cylinder
Cooling System: 17 Quarts
Fuel Tank: 20 Gallons;
Engine Oil Refill: 7 Quarts;
Grade of Oil: Above +32F 20;
Above +10F 20W;
Above -10F 10W
Manual Transmission: 3-1/2 Pints, Without Overdrive: 6 Pints With Overdrive
Grade of Oil: Summer 70, Winter 50
Rear Axle: 5 Pints
Grade of Oil: Summer 90H, Winter 90H
Beginning Engine Numbers:
Model 4010: HE-56500
Model 4020: E-339500
Model 4080: B-105800
Beginning Serial Numbers:
Model 4010: H-57000
Model 4020: R-340000
Model 4080: B-106300
Brake Specifications, 6 Cylinder Models
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 22"
Width: 2",
Thickness: 3/16"
Pedal Free Play: 3/8"
Brake Specifications, Ambassador 8, Model 4080
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 24"
Width: 2-1/4",
Thickness: 3/16"
Pedal Free Play: 3/8"
Wheel Alignment Specifications, All Series:
Caster: - 1/4 Degrees
Camber: +1/2 Degrees
Toe In: 1/16"
Kingpin Inclination: 4-1/2 Degrees
Rear Axle Specifications, All Series:
Ring Gear & Pinion Backlash: .005"-.007"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: Shims
Axle Shaft End Play: .004"-.006"
Auto-Lite Distributor Specifications, Series 10 (Lafayette):
Distributor #1GS-4104
Cam Angle: 38 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degree @ 300 RPM
Full Advance: 5 Degrees @ 850 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 7" Vacuum
Full Advance: 5-1/2 Degrees @ 12" Vacuum
Auto-Lite Distributor Specifications, Series 10 (Lafayette):
Distributor #1GS-4104X
Cam Angle: 38 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degree @ 300 RPM
Full Advance: 5 Degrees @ 850 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 7" Vacuum
Full Advance: 5-1/2 Degrees @ 12" Vacuum
Auto-Lite Distributor Specifications, Series 20:
Distributor #1GE-4019
Cam Angle: 35 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 3 Degrees @ 370 RPM
Full Advance: 11-1/2 Degrees @ 875 RPM
Auto-Lite Distributor Specifications, Series 80:
Distributor #1GK-4102
Cam Angle: 28 Degrees
Breaker Point Opening: .017"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 4 Degrees @ 400 RPM
Full Advance: 12 Degrees @ 1,100 RPM
Auto-Lite Generator Specifications, Series 10 (Lafayette) & 20:
Generator #GDZ-4803A
Brush Spring Tension: 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
Auto-Lite Generator Specifications, Series 80:
Generator #GDZ-4803B
Brush Spring Tension: 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
Auto-Lite Regulator Specifications - All Series:
Regulator Type: Voltage & Current
Part #VRP-4004A
Ground Polarity: Positive
Voltage to Close Relay Points: 6.4 - 6.6
Amperage to Open Relay Points: 4 - 6 Amperes
Maximum Operating Amperage: 34 - 36 Amperes
Maximum Operating Voltage @ 70 Degrees: 7.35 Volts
Starting Motor Specifications - 6 Cylinder:
Part #MAB-4076
Brush Spring Tension: 42 - 53 Ounces
No Load Test: 60 Amperes, 5.5 Volts @ 3,700 RPM
Lock Test: 775 Amperes, 4.0 Volts @ 22.5 Ft Lbs Torque
Starting Motor Specifications - 8 Cylinder Models:
Part #MAB-4104
Brush Spring Tension: 42 - 53 Ounces
No Load Test: 60 Amperes, 5.5 Volts @ 3,700 RPM
Lock Test: 775 Amperes, 4.0 Volts @ 22.50 Ft Lbs Torque
Carter Carburetor Specifications - Series 10:
Carburetor Model: WDO
Part #458S
Casting # 295
Repair Kit # 1082
Float Level: 3/16"
Idle Screw Setting: 1/4 to 1-1/4 Turns
Metering Rod Gauge: T109-113
Pump Travel: 32/64" (Long Stroke)
Anti-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .026"
Choke Lockout Adjustment: None
Carter Carburetor Specifications - Series 20:
Carburetor Model: WA1
Part #435S
Casting # 253
Repair Kit # 1065
Float Level: 3/8"
Idle Screw Setting: 3/4 to 1-1/2 Turns
Metering Rod Gauge: T109-102
Pump Travel: 27/64" (Long Stroke)
Anti-Percolator Setting: With throttle valve open .020", there should be .005" to .015" clearance between rocker arm & pump arm.
Unloader Setting: 31/64"
Fast Idle Setting: 5/8"
Choke Lockout Adjustment: 1/32"
Carter Carburetor Specifications - Series 80:
Carburetor Model: WD0
Part #465S
Casting # 255
Repair Kit # N/A
Float Level: 3/16"
Idle Screw Setting: 1/2 to 1-1/2 Turns
Metering Rod Gauge: T109-113
Pump Travel: 32/64" (Long Stroke)
Anti-Percolator Setting: With throttle closed, indicator lines should be flush with the top of the anti-percolator plugs.
Unloader Setting: 9/64"
Fast Idle Setting: .015"
Choke Lockout Adjustment: None
Fuel Pump Data:
Pump Type: W
Maximum Pressure: 4-1/2 PSI
Pump Type AD
Maximum Pressure: 3-1/2 PSI
Dash Gauge Manufacturer:
Lafayette:
Gasoline: Moto-Meter-Neco
Temperature: King-Seeley
Oil Pressure: King-Seeley
Ammeter: King-Seeley
Dash Gauge Manufacturers:
Nash:
Gasoline: King-Sealey
Temperature: King-Sealey
Oil Pressure: King-Sealey
Ammeter: King-Sealey
Popular Options
Radio, Antenna, Heater, Clock, Cigar Lighter, Bed Conversion, Fender Skirt, Overdrive, Hill Holder.
1940 Nash Historical Data
Model Year Introduction was on September 15, 1939.
Total 1940 Nash Production was 63,617.
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