1948 NASH
Model Designations:
Nash "600," Series 40, 6 Cylinder
Nash, Ambassador, Series 60, 6 Cylinder
Nash "600," Series 40, 6 Cylinder, Body Styles
Super Line & DeLuxe Coupe
4 Door Trunk Sedan, 6 Passenger, Model #4840
Base Price: $1,587; Shipping Weight: 2,786 Pounds; Production Total: 25,103
2 Door Brougham, 6 Passenger, Model #4843
Base Price: $1,538; Shipping Weight: 2,731 Pounds; Production Total: 11,530
4 Door Fastback Sedan, 6 Passenger, Model #4848
Base Price: $1,534; Shipping Weight: 2,826 Pounds; Production Total: 25,044
Customline
4 Door Trunk Sedan, 6 Passenger, Model #4850
Base Price: $1,776; Shipping Weight: 2,786 Pounds; Production Total: 346
2 Door Brougham, 6 Passenger, Model #4853
Base Price: $1,727; Shipping Weight: 2,731 Pounds; Production Total: 170
4 Door Fastback Sedan, 6 Passenger, Model #4858
Base Price: $1,732; Shipping Weight: 2,826 Pounds; Production Total: 332
Nash Ambassador, Series 60, 6 Cylinder, Body Styles
Super Line
4 Door Trunk Sedan, 6 Passenger, Model #4860
Base Price: $1,916; Shipping Weight: 3,387 Pounds; Production Total: 14,248
2 Door Brougham Sedan, 6 Passenger, Model #4863
Base Price: $1,858; Shipping Weight: 3,312 Pounds; Production Total: 7,221
4 Door Suburban, 6 Passenger, Model #4864
Base Price: $2,239; Shipping Weight: 3,522 Pounds; Production Total: 130
4 Door Fastback Sedan, 6 Passenger, Model #4868
Base Price: $1,874; Shipping Weight: 3,412 Pounds; Production Total: 14,777
Custom Line
4 Door Trunk Sedan, 6 Passenger, Model #4870
Base Price: $2,105; Shipping Weight: 3,387 Pounds; Production Total: 4,122
2 Door Brougham Sedan, 6 Passenger, Model #4873
Base Price: $2,047; Shipping Weight: 3,312 Pounds; Production Total: 929
4 Door Fastback Sedan, 6 Passenger, Model #4878
Base Price: $2,063; Shipping Weight: 3,412 Pounds; Production Total: 4,143
2 Door Cabriolet, 6 Passenger, Model #4871
Base Price: $2,355; Shipping Weight: 3,465 Pounds; Production Total: 1,000
1948 NASH
Nash "600," Series 4840, 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: 6.40 x 15 inches; Inflation Pressure, Front 24, Rear, 24
Ambassador 6, Series 4860, 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: 7.10 x 15 inches; Inflation Pressure, Front 24, Rear, 24
Tune Up Specifications, Nash "600," Series 4840
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 4860
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 Lbs
Compression Pressure @ Cranking Speed: 125 PSI (Minimum)
Valve Specifications, Nash "600," Series 4840, 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 .0013"-.0028"
Exhaust .0013"-.0028"
Valve Specifications, Ambassador, Series 4860, 6 Cylinder
Tappet Clearance, Running Hot: Intake .015"; Exhaust .018"
Clearance for Timing: Intake: .0225"; Exhaust: .0225"
Valve Timing:
Intake Valve Opens @ 4-1/2 Degrees Before Top Dead Center
Exhaust Valve Closes @ 16-1/2 Degrees After Top Dead Center
Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,
Valve Spring Pressure: 48 Lbs @ 1-11/16"
Valve Stem Clearance: Intake .0015"-.003"
Exhaust .002"-.0035"
Piston & Ring Data, Nash "600", Series 4840, 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 4860, 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 4840, 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 4860, 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 4840, 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 4860, 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 #1GC-4512
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: 1 Degree @ 325 RPM
Full Advance: 11 Degrees @ 1,450 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 5" Vacuum
Full Advance: 7-1/2 Degrees @ 15" Vacuum
Delco-Remy Distributor Specifications:
Distributor #1112351
Rotation: Counter-Clockwise
Cam Angle: 31 to 37 Degrees
Breaker Point Opening: .022"
Condenser Capacity: .18-.23 Mfds
Breaker Arm Spring Tension: 17-21 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degree @ 300 RPM
Full Advance: 11 Degrees @ 1,400 RPM
Vacuum Advance Data:
Inches of Vacuum to Start Plunger Movenent: 3" to 5" Vacuum
Inches of Vacuum for Full Plunger Travel: 13" - 17" Vacuum
Maximum Vacuum Advance: 7-1/2 Degrees
Auto-Lite Generator Specifications:
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
Delco-Remy Generator Specifications:
Generator #1102702
Generator Output: 30 Amperes @ 2,050 RPM
Brush Spring Tension: 28 Ounces
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75 - 1.95 Amperes
Regulator # 1118202
Cutout Relay:
Voltage to Close Points: 6.4 Volts
Reverse Current to Open Points: 0 to 3 Amperes
Armature Air Gap: .020"
Voltage Regulator Setting: 7.4 Volts
Current Regulator Setting: 36 Amperes
Current & Voltage Armature Air Gap: .075"
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
Delco-Remy Starting Motor Specifications:
Part #1109451
Rotation: Clockwise
Brush Spring Tension: 24 - 28 Ounces
No Load Test: 60 Amperes, 5.7 Volts @ 6,000 RPM
Torque Test: 540 Amperes, 3.3 Volts @ 11.5 Ft Lbs Torque
Part #1107949
Rotation: Clockwise
Brush Spring Tension: 24 - 28 Ounces
No Load Test: 65 Amperes, 5.0 Volts @ 5,500 RPM
Torque Test: 600 Amperes, 3.0 Volts @ 16 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 #622S-SA
Float Level: 1/2"
Idle Screw Setting: 3/4 to 1-3/4 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: With Throttle Valve wide open, push choke valve wide open. If it does not lock, bend lip at lower end of fast idle link.
Automatic Choke Setting:
#662S: 2 Lean
#662SA: Index
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 4840
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 20-1/2"
Width:
Front Primary: 2-1/2"
Front Secondary: 2"
Rear Primary: 2"
Rear Secondary: 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 4860
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 4840:
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 4860:
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 4840: KE-55001
Model 4860: RE-40001
Beginning Serial Numbers:
Model 4840: K-196901
Model 4860: R-468501
Popular Options
Radio & Antenna, Conditioned Air System, Vacuum Booster Pump, Turn Signals, Foam Rubber Cushiions, Oil Bath Air Cleaner, Oil Filter on "600," Crusing Gear on Ambassador
1948 Nash Historical Data
Total 1948 Nash Production was 118,621.
Copyright 1999, Custom Solutions & Services
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