1946 NASH
Model Designations:
Nash "600," Series 40, 6 Cylinder
Nash, Ambassador, Series 60, 6 Cylinder
Nash "600," Series 40, 6 Cylinder, Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4640
Base Price: $1,342; Shipping Weight: 2,740 Pounds; Production Total: 7,300
2 Door Brougham, 6 Passenger, Model #4643
Base Price: $1,293; Shipping Weight: 2,685 Pounds; Production Total: 8,500
4 Door Fastback Sedan, 6 Passenger, Model #4648
Base Price: $1,298; Shipping Weight: 2,780 Pounds; Production Total: 42,300
Nash Ambassador, Series 60, 6 Cylinder, Body Styles
4 Door Trunk Sedan, 6 Passenger, Model #4660
Base Price: $1,511; Shipping Weight: 3,335 Pounds; Production Total: 3,875
2 Door Brougham Sedan, 6 Passenger, Model #4663
Base Price: $1,453; Shipping Weight: 3,260 Pounds; Production Total: 4,825
4 Door Suburban, 6 Passenger, Model #4664
Base Price: $1,929; Shipping Weight: 3,470 Pounds; Production Total: 275
4 Door Fastback Sedan, 6 Passenger, Model #4668
Base Price: $1,469; Shipping Weight: 3,360 Pounds; Production Total: 26,225
1946 NASH
Nash "600," Series 4640, 6 Cylinder, 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: 7.00 to 1
Taxable Horsepower: 23.44
Horsepower: 82 @ 3,800 RPM
Torque: 138 Ft Lbs @ 1,600 RPM
Normal Oil Pressure: 30 PSI
Rear Axle Ratio: Not Available
Tire Size: 6.00 x 16 inches; Inflation Pressure, Front 28, Rear, 28
Ambassador 6, Series 4660, 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: 7.02 to 1
Taxable Horsepower: 27.35
Horsepower: 112 @ 3,400 RPM
Torque: 208 Ft Lbs @ 1,600 RPM
Normal Oil Pressure: 30 PSI
Rear Axle Ratio: Not Available
Tire Size: 6.50 x 15 inches; Inflation Pressure, Front 26, Rear, 26
Tune Up Specifications, Nash "600," Series 4640
Spark Plug: Gap .025"
Spark Plug Type: Auto-Lite A5, Champion J-8, J-11 or Equivalent
Point Gap: .020"
Firing Order: 1-5-3-6-2-4
Ignition Timing: IGN Mark on Vibration Damper
Engine Idle Speed: 475 RPM
Tappet Clearance, Hot: Intake .015", Exhaust .015"
Cylinder Head Torque: 60 Ft Lbs
Compression Pressure @ Cranking Speed: 120 PSI (Minimum)
Tune Up Specifications, Ambassador, Series 4660
Spark Plug: Gap .025"
Spark Plug Type: Auto-Lite A5, AC-44, Champion J-8, J-11 or Equivalent
Point Gap: .020"
Firing Order: 1-5-3-6-2-4
Ignition Timing: "IGN" Mark on Vibration Damper
Engine Idle Speed: 475 RPM
Tappet Clearance, Hot: Intake .015", Exhaust .018"
Cylinder Head Torque: 65 Ft Lb
Compression Pressure @ Cranking Speed: 125 PSI (Minimum)
Valve Specifications, Nash "600," Series 4640, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .015"
Clearance for Timing: Intake: .019"; Exhaust: .019"
Valve Timing:
Intake Valve Opens @ 6 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: 37 Lbs @ 1-3/4 inches (New Springs)
Valve Stem Clearance: Intake .002"-.003"
Exhaust .002"-.003"
Valve Specifications, Ambassador, Series 4660, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .018"
Clearance for Timing: Intake: .008"; Exhaust: .015"
Valve Timing:
Intake Valve Opens @ 24 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: 65 Lbs @ 1-11/16"
Valve Stem Clearance: Intake .002"-.004"
Exhaust .002"-.004"
Piston & Ring Data, Nash "600", Series 4640, 6 Cylinder
Piston Removal: From Above
Piston Clearance (Minimum):
Top Land Inch .017"
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 , Series 4660, 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"
Engine Bearing Data, Nash "600", Series 4640, 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, Nash Ambassador, Series 4660, 6 Cylinder
Camshaft End Play: .004"-.006"
Camshaft Bearing Clearance: .001"-.003"
Rod Journal Diameter: 1.9995"- 2.0005"
Rod Bearing Clearance: .0015"-.0025"
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.
Capacities, Nash "600", Series 4640, 6 Cylinder
Cooling System:
Without Heater: 14 Quarts
With Heater: 15 Quarts
Fuel Tank: 20 Gallons;
Engine Oil Refill: 5 Quarts;
Grade of Oil: Above +32F 20;
Above +10F 20W;
Above -10F 10W
Manual Transmission: 2-1/4 Pints Without Overdrive: 4-1/2 Pints With Overdrive
Grade of Oil: Summer 90, Winter 80
Rear Axle: 3 Pints
Grade of Oil: Summer 90H, Winter 90H
Capacities, Ambassador 6, Series 4660, 6 Cylinder
Cooling System:
Without Heater: 17 Quarts
With Heater: 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: 4 Pints Without Overdrive; 6 Pints With Overdrive
Grade of Oil: Summer 90, Winter 80
Rear Axle: 4 Pints
Grade of Oil: Summer 90H, Winter 90H
Auto-Lite Distributor Specifications, Series 40:
Distributor #1GW-4184
Rotation: Counter-Clockwise
Cam Angle: 39 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 2 Degrees @ 300 RPM
Full Advance: 11 Degrees @ 1,400 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 5" Vacuum
Full Advance: 7-1/2 Degrees @ 15" Vacuum
Auto-Lite Distributor Specifications, Series 60:
Distributor #1GS-4205A
Rotation: Clockwise
Cam Angle: 39 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degree @ 380 RPM
Full Advance: 12 Degrees @ 1,350 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 6-3/4" Vacuum
Full Advance: 6 Degrees @ 15" Vacuum
Auto-Lite Distributor Specifications, Series 40:
Distributor #1GW-4184A
Rotation: Counter-Clockwise
Cam Angle: 39 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 2 Degrees @ 300 RPM
Full Advance: 11 Degrees @ 1,400 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 5" Vacuum
Full Advance: 7-1/2 Degrees @ 15" Vacuum
Auto-Lite Distributor Specifications, Series 60:
Distributor #1GS-4205B
Rotation: Clockwise
Cam Angle: 39 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .20-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degree @ 350 RPM
Full Advance: 14 Degrees @ 1,350 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 6-3/4" Vacuum
Full Advance: 6 Degrees @ 15" Vacuum
Auto-Lite Generator Specifications, All Series:
Generator #GDZ-4806A
Generator Output: 35 Amperes @ 2,000 RPM
Brush Spring Tension: 35-53 Ounces
Direction of Rotation: Clockwise
Field Current @ 5 Volts: 1.3 - 1.5 Amperes
Regulator # VRP-6001
Cutout Relay:
Voltage to Close Points: 6.5 Volts
Reverse Current to Open Points: 4 to 6 Amperes
Armature Air Gap: .031"
Voltage Regulator Setting: 7.3 Volts
Current Regulator Setting: 35 Amperes
Current & Voltage Armature Air Gap: .048"
Ground Polarity: Positive
Auto-Lite Starting Motor Specifications:
Part #MZ-4103
Rotation: Clockwise
Brush Spring Tension: 42 - 53 Ounces
No Load Test: 68 Amperes, 5.0 Volts @ 4,000 RPM
Lock Test: 280 Amperes, 2.0 Volts @ 4.4 Ft Lbs Torque
Carter Carburetor Specifications:
Carburetor Model: WA-1
Part #464S
Float Level: 3/8"
Idle Screw Setting: 1/2 to 1-1/2 Turns
Pump Adjustment Using Gauge T109-117S: 27
Metering Rod Gauge: T109-102
Anti-Percolator Adjustment: .020"
Fast Idle Adjustment: 5/8"
Unloader Adjustment: 31/64"
Choke Lockout Adjustment: 1/32"
Automatic Choke Setting: Index
Carburetor Model: WA-1
Part #611S
Float Level: 1/2"
Idle Screw Setting: 1-1/4 to 2-1/4 Turns
Pump Adjustment Using Gauge T109-117S: 25
Metering Rod Gauge: T109-102
Anti-Percolator Adjustment: .030"
Fast Idle Adjustment: 5/8"
Unloader Adjustment: 7/16"
Choke Lockout Adjustment: 1/32"
Automatic Choke Setting: 2 Lean
Fuel Pump Data:
Pump Type: W
Maximum Pressure: 4-1/2 PSI
Dash Gauge Manufacturers:
Gasoline: King-Sealey
Temperature: King-Sealey
Oil Pressure: King-Sealey
Ammeter: King-Sealey
Brake Specifications, Nash "600", Series 4640
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 20-1/2"
Width: 1-3/4",
Thickness: 3/16"
Brake Shoe Clearance: .010"
Wheel Cylinder Bore:
Front: 1"
Rear: 7/8"
Master Cylinder Bore: 1"
Pedal Free Play: 3/8"
Brake Specifications, Ambassador, Series 4660
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 22"
Width: 2",
Thickness: 3/16"
Brake Shoe Clearance: .015"
Wheel Cylinder Bore:
Front: 1-1/16"
Rear: 1"
Master Cylinder Bore: 1-1/8"
Pedal Free Play: 3/8"
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Wheel Alignment Specifications, Series 4640:
Caster: + 1/2 Degrees
Camber: + 1/2 Degrees
Toe-In: 1/8" to 3/16"
Toe-Out on Turns:
Outer Wheel: 20 Degrees
Inner Wheel: 23-1/2 to 24 Degrees
Kingpin Inclination: 7-1/2 Degrees
Wheel Alignment Specifications, Series 4660:
Caster: - 1/4 Degrees
Camber: + 1/2 Degrees
Toe-In: 1/16" to 3/16"
Toe-Out on Turns:
Outer Wheel: 20 Degrees
Inner Wheel: 23-1/2 to 24 Degrees
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: .002"-.004"
Beginning Engine Numbers:
Model 4640: K-77701
Model 4660: R-393101
Beginning Serial Numbers:
Model 4640: K-77701
Model 4660: R-393101
Popular Options
Radio & Antenna, Conditioned Air System, Vacuum Booster Pump, Turn Signals, Foam Rubber Cushiions, Oil Bath Air Cleaner, Oil Filter
1946 Nash Historical Data
Total 1946 Nash Production was 94,000.
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