1941 NASH
Model Designations:
Nash, Ambassador "Eight," Series 4180, 8 Cylinder
Nash, Ambassador "Six," Series 4160, 6 Cylinder
Nash Ambassador "600," Series 4140, 6 Cylinder
Nash Ambassador 8, Series 4180, 8 Cylinder Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4180
Base Price: $1,151; Shipping Weight: 3,475 Pounds
2 Door Cabriolet, 3/5 Passenger, Model #4181
Base Price: $1,215; Shipping Weight: 3,580 Pounds
2 Door Brougham, 5 Passenger, Model #4183
Base Price: $1,081; Shipping Weight: 3,400 Pounds
4 Door Special Sedan, 6 Passenger, Model #4187
Base Price: $1,051; Shipping Weight: 3,450 Pounds
4 Door Sedan, 6 Passenger, Model #4188
Base Price: $1,101; Shipping Weight: 3,455 Pounds
Production Totals by Body Style are not available.
Nash Ambassador Six, Series 4160, 6 Cylinder, Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4160
Base Price: $1,030; Shipping Weight: 3,300 Pounds
2 Door Cabriolet, 3/5 Passenger, Model #4161
Base Price: $1,095; Shipping Weight: 3,430 Pounds
2 Door Coupe, 3 Passenger, Model #4162
Base Price: $905; Shipping Weight: 3,310 Pounds
2 Door Brougham, 5 Passenger, Model #4163
Base Price: $974; Shipping Weight: 3,235 Pounds
2 Door SportCoupe, 3 Passenger, Model #4165
Base Price: $855; Shipping Weight: 3,180 Pounds
4 Door Special Sedan, 6 Passenger, Model #4167
Base Price: $930; Shipping Weight: 3,300 Pounds
4 Door Sedan, 6 Passenger, Model #4168
Base Price: $985; Shipping Weight: 3,300 Pounds
2 Door Special Sedan, 6 Passenger, Model #4169
Base Price: $898; Shipping Weight: 3,320 Pounds
Production Totals by Body Style are not available.
Nash Ambassador "600," Series 4140, 6 Cylinder, Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4140
Base Price: $860; Shipping Weight: 2,655 Pounds
2 Door Coupe, 3 Passenger, Model #4142
Base Price: $783; Shipping Weight: 2,500 Pounds
2 Door Brougham, 5 Passenger, Model #4143
Base Price: $810; Shipping Weight: 2,575 Pounds
2 Door Sport Coupe, 3 Passenger, Model #4145
Base Price: $731; Shipping Weight: 2,490 Pounds
2 Door Sport Sedan, 6 Passenger, Model #4146
Base Price: $745; Shipping Weight: 2,630 Pounds
4 Door Sport Sedan, 6 Passenger, Modell #4147
Base Price: $780; Shipping Weight: 2,615 Pounds
4 Door Sedan, 6 Passenger, Model #4148
Base Price: $810; Shipping Weight: 2,630 Pounds
2 Door Sedan, 6 Passenger, Model #4149
Base Price: $777; Shipping Weight: 2,640 Pounds
Production Totals by Body Style are not available.
1941 NASH
Ambassador "600" Six, Series 4140, General Specifications
Wheelbase: 112 Inches
Engine Type: Inline 6 Cylinder, L-Head
Bore & Stroke: 3-1/8" X 3-3/4"
Engine Displacement: 172.6 Cu. In.
Compresssion Ratio: 6.70 to 1
Taxable Horsepower: 23.44
Horsepower: 75 @ 3,600 RPM
Torque: 136 Ft Lbs @ 1,200 RPM
Rear Axle Ratio: 4.10:1
Carburetor: Carter 513S
Tire Size: 5.50 x 16 inches; Inflation Pressure, Front 28, Rear, 28
Ambassador 6, Series 4160, 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: 6.30 to 1
Taxable Horsepower: 27.35
Horsepower: 105 @ 3,400 RPM
Torque: 195 Ft Lbs @ 1,600 RPM
Rear Axle Ratio: 4.10:1
Carburetor: Carter 435S
Tire Size: 6.25 x 16 inches; Inflation Pressure, Front 28, Rear, 28
Ambassador 8, Series 4180, General Specifications
Wheelbase: 121 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: 6.30 to 1
Taxable Horsepower: 31.25
Horsepower: 115 @ 3,400 RPM
Torque: 200 Ft Lbs @ 1,600 RPM
Rear Axle Ratio: 4.10:1
Carburetor: Carter 511S .
Tire Size: 6.50 x 16 inches; Inflation Pressure, Front 26, Rear, 26
Tune Up Specifications, Ambassador "600" 6, Series 4140
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: 60 Ft Lbs
Tune Up Specifications, Ambassador 6, Series 4160
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 4180
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
Carburetor Specifications:
Valve Specifications, Nash "600", Series 4140, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .015"; Exhaust: .015"
Valve Timing:
Intake Valve Opens @ 19 Degrees Before Top Dead Center
Exhaust Valve Closes @ 23 Degrees After Top Dead Center
Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,
Valve Spring Pressure: 37 Lbs @ 1-3/4 inches (New Springs)
Valve Stem Clearance: Intake .002"-.003"
Exhaust .002"-.003"
Valve Specifications, Ambassador 6, Series 4160, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .015"; Exhaust: .015"
Valve Timing:
Intake Valve Opens @ 11.6 Degrees After 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 4180, 8 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .015"; Exhaust: .015"
Valve Timing: Intake Valve Opens, 16 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, Ambassador "600", Series 4140, 6 Cylinder
Piston Removal: From Above
Piston Clearance (Minimum):
Top Land Inch .020"
Top of Skirt, Inch: .001"
Fitting Pistons with Spring Scale:
Piston Supported at its own weight anywhere in the cylinder
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 4160, 6 Cylinder
Piston Removal: Above
Piston Clearance (Minimum):
Top Land Inch .020"
Top of Skirt, Inch: .001"
Fitting Pistons with Spring Scale:
Piston Supported at its own weight anywhere in the cylinder
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 4180, 8 Cylinder
Piston Removal: Below
Piston Clearance (Minimum):
Top Land Inch .020"
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, Ambassador "600", Series 4140, 6 Cylinder
Camshaft End Play: .004"-.006"
Camshaft Bearing Clearance: .001"-.003"
Rod Journal Diameter: 1.875"
Rod Bearing Clearance: .0015"-.002"
Rod End Play: .006"-.012" inches
Rod Bolt Tension: 27-30 Lbs. Ft.
Main Bearing Journal Diameter: 2.4785"-2.4795"
Main Bearing Clearance: .002"
Crankshaft End Play: .006"-.008"
Main Bolt Tension: 70 Lbs. Ft.
Engine Bearing Data, Ambassador "Six", Series 4160, 6 Cylinder &
Ambassador "Eight", Series 4180, 8 Cylinder
Camshaft End Play: .004"-.006"
Camshaft Bearing Clearance: .001"-.003"
Rod Journal Diameter: 1.9995"- 2.0005"
Rod Bearing Clearance: .0015"-.002"
Rod End Play: .006"-.014" inches
Rod Bolt Tension: 50-55 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.
Ambassador "600", Series 4140, 6 Cylinder
Cooling System: 14 Quarts
Fuel Tank: 20 Gallons;
Engine Oil Refill: 5 Quarts;
Grade of Oil: Above +32F 20;
Above +10F 20W;
Above -10F 10W
Manual Transmission: 1 Pint Without Overdrive: 3 Pints With Overdrive
Grade of Oil: Summer 70, Winter 50
Rear Axle: 3 Pints
Grade of Oil: Summer 90H, Winter 90H
Capacities, Ambassador 6, Series 4160, 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: 4 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 4180, 8 Cylinder
Cooling System: 16 Quarts
Fuel Tank: 20 Gallons;
Engine Oil Refill: 7 Quarts;
Grade of Oil: Above +32F 20;
Above +10F 20W;
Above -10F 10W
Manual Transmission: 4 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
Beginning Engine Numbers:
Model 4140: K-5001
Model 4160: R-353001
Model 4180: B-110001
Beginning Serial Numbers:
Model 4140: L-5001
Model 4160: R-353001
Model 4180: B-110001
Brake Specifications, Ambassador "600", Series 4140, 6 Cylinder Models
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 20-1/2"
Width: 1-3/4",
Thickness: 3/16"
Pedal Free Play: 3/8"
Brake Specifications, Ambassador 6, Model 4160 &
Ambassador 8, Model 4180
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 22"
Width: 2",
Thickness: 3/16"
Pedal Free Play: 3/8"
Wheel Alignment Specifications, All Series:
Caster: Zero Degrees
Camber: +1/4 Degrees
Toe In: 1/32"
Kingpin Inclination: 5-1/2 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: .002"-.004"
Delco-Remy Distributor Specifications, Series 40:
Distributor #1110512
Cam Angle: 35 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-21 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degrees @ 400 RPM
Full Advance: 10 Degrees @ 1,200 RPM
Vacuum Advance Data:
Inches of Vacuum to Start Plunger Movement: 3"-5" Vacuum
Inches of Vacuum for Full Plunger Travel: 14"-17" Vacuum
Maximum Vacuum Advance: 8-1/2 Degrees
Auto-Lite Distributor Specifications, Series 60:
Distributor #1GE-4024
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
Delco-Remy Generator Specifications, Series 40:
Generator #1102684
Brush Spring Tension: 25 Ounces
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75 - 1.90 Amperes
Maximum Output (Cold): 30 Amperes; .0 Volts @ 1,750 RPM
Maximum Hot Output: Controlled by Current Regulator
Auto-Lite Generator Specifications, Series 60:
Generator #GDZ-4806A
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
Delco-Remy Regulator Specifications - Series 40:
Regulator Type: Voltage & Current
Part #1118202
Ground Polarity: Positive
Voltage to Close Relay Points: 6.2 - 6.7
Amperage to Open Relay Points: 0 - 4.0 Amperes
Maximum Operating Amperage: 34 - 36 Amperes
Maximum Operating Voltage @ 70 Degrees: 7.2 - 7.4 Volts
Auto-Lite Regulator Specifications - All Series, Except Series 40:
Regulator Type: Voltage & Current
Part #VRP-4004F
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
Auto-Lite Regulator Specifications - All Series, Except Series 40:
Regulator Type: Voltage & Current
Part #VRP-4004F-1
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
Delco-Remy Starting Motor Specifications - Series 40
Part #1109451
Brush Spring Tension: 24 - 28 Ounces
No Load Test: 60 Amperes, 5.7 Volts @ 6,000 RPM
Lock Test: 540 Amperes, 3.3 Volts @ 11.5 Ft Lbs Torque
Auto-Lite Starting Motor Specifications - Series 60
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
Auto-Lite 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 40:
Carburetor Model: BB
Part #513S
Casting # 177
Repair Kit # 1307A
Float Level: 5/64"
Idle Screw Setting: 1/2 to 1-1/4 Turns
Metering Rod Gauge: None
Pump Travel: 30/64" (Long Stroke)
Anti-Percolator Setting: None
Carter Carburetor Specifications - Series 60:
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 #511S
Casting # 360
Repair Kit # 1306A
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
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, DeLuxe Steering Wheel.
1941 Nash Historical Data
Model Year Introduction was on October 1, 1940.
Total 1941 Nash Production was 80,428.
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