1951 WILLYS
Model Designations:
Willys Station Wagon
Willys Jeepster
Willys, Model 4 & 6 Cylinder, Body Styles
2 Door Station Wagon, 6 Passenger, Model 473SE, 4 Cylinder
Base Price: $1,758; Shipping Weight: 2,818 Pounds;
2 Door Station Wagon, 4 Wheel Drive, 6 Passenger, Model 4X473, 4 Cylinder
Base Price: $2,180; Shipping Weight: 3,174 Pounds;
2 Door Jeepster, 5 Passenger, Model 473VJ, 4 Cylinder
Base Price: $1,426; Shipping Weight: 2,459 Pounds
2 Door Station Wagon, 6 Passenger, Model 673SW, 6 Cylinder
Base Price: $1,841; Shipping Weight: 2,831 Pounds;
2 Door Jeepster, 5 Passenger, Model 673VJ
Base Price: $1,529; Shipping Weight: 2,485 Pounds
Total 1951 Production was: 28,226. (Calendar Year)
General Specifications, 4 Cylinder, F-Head Engine
Wheelbase: 104 Inches
Engine Type: Inline 4, F-Head
Bore & Stroke: 3-1/8" X 4-3/8"
Engine Displacement: 134.2 Cu. In.
Compresssion Ratio: 7.40:1
Taxable Horsepower: 15.63
Horsepower: 72 @ 4,000 RPM
Torque: 114 Ft. Lbs @ 2,000 RPM
Normal Oil Pressure: 35 PSI
General Specifications, 6 Cylinder, L- Head Engine
Wheelbase: 104 Inches
Engine Type: Inline 6, L-Head
Bore & Stroke: 3-1/8" X 3-1/2"
Engine Displacement: 161.0 Cu. In.
Compresssion Ratio: 6.90:1
Taxable Horsepower: 23.44
Horsepower: 75 @ 4,000 RPM
Torque: 117 Ft. Lbs @ 1,600 RPM
Normal Oil Pressure: 35 PSI
Tire Sizes:
Jeepster: 6.40 X 15 Inches
Station Wagons: 6.70 X 15 Inches
Station Wagons with 4 Wheel Drive: 7.00 X 15 Inches
Tune Up Specifications, 4 Cylinder Engines
Spark Plug Type: Champion J-8 or Equivalent
Spark Plug: Gap .030"
Point Gap: .020"
Firing Order: 1-3-4-2
Ignition Timing: IGN or 5 Degrees BTDC
Engine Idle Speed: 600 RPM
Cylinder Head Torque: 60-70 Ft Lbs
Compression Pressure @ Cranking Speed: 111 PSI (Minimum)
Tune Up Specifications, 6 Cylinder Engines
Spark Plug Type: Champion J-8 or Equivalent
Spark Plug: Gap .030"
Point Gap: .020"
Firing Order: 1-5-3-6-2-4
Ignition Timing: 5 Degrees BTDC
Engine Idle Speed: 550 RPM
Cylinder Head Torque: 60-70 Ft Lbs
Compression Pressure @ Cranking Speed: 111 PSI (Minimum)
Valve Specifications, 4 Cylinder Engines
Tappet Clearance, Cold:
Intake .018";
Exhaust .012" w/Eaton Free Valve; .016" w/Thompson Roto Valve
Clearance for Intake Timing: .020"
Valve Seat Angle: 45 degrees
Valve Timing: Intake Opens 9 Degrees Before Top Dead Center
Exhaust Closes 12 degrees After Top Dead Center
Valve Spring Pressure:
Intake: 73 Lbs @ 1-21/32"
Exhaust: 50 Lbs @ 1-5/8"
Valve Stem Clearance: Intake .0015"-.003"
Exhaust .0025"-.0045"
Valve Specifications, 6 Cylinder Engines
Tappet Clearance, Cold: Intake .016"; Exhaust .016"
Clearance for Intake Timing: .020"
Valve Seat Angle: 45 degrees,
Valve Timing: Intake Opens 5 Degrees Before Top Dead Center
Exhaust Closes 12 degrees After Top Dead Center
Valve Spring Pressure: 50 Lbs @ 1-5/8 inches (New Springs)
Valve Stem Clearance: Intake .0015"-.003"
Exhaust .0025"-.0045"
Piston & Ring Data, 4 Cylinder Engines
Piston Removal: From Above
Fitting Pistons with Spring Scale:
Shim Thickness: .003" using a 3/4" feeler gauge
Pounds Pull on Scale: 5 to 10
Ring End Gap (Minimum):
Compression Ring: .008"
Oil Ring: .008"
Clearance in Grooves:
Compression Ring: .0005"-.0015"
Oil Control Ring: .0005"-.0015"
Wrist Pin Diameter: .8118" to .8120"
Piston & Ring Data, 6 Cylinder Engines
Piston Removal: From Above
Fitting Pistons with Spring Scale:
Shim Thickness: .0025 using a 3/4" wide feeler gauge
Pounds Pull on Scale: 7 to 12
Ring End Gap (Minimum):
Compression Ring: .008"
Oil Ring: .008"
Clearance in Grooves:
Compression Ring:
Top Ring: .002"-.004"
Second Ring: .0015"-.0035"
Oil Control Ring: .001"-.0025"
Wrist Pin Diameter: .7496"-.7498"
Engine Bearing Data, 4 Cylinder Engines
Rod Journal Diameter: 1.9375"-1.9385"
Rod Bearing Clearance: .0002"-.0025"
Rod End Play: .004"-.010" inches
Rod Bolt Tension: 50-55 Lbs. Ft.
Main Bearing Journal Diameter: 2.3335"-2.3341"
Main Bearing Clearance: .0014" -.0029"
Crankshaft End Play: .004"-.006"
Main Bolt Tension: 65-70 Lbs. Ft.
Engine Bearing Data, 6 Cylinder Engines
Rod Journal Diameter: 1.875"
Rod Bearing Clearance: .0005"-.0025"
Rod End Play: .002"-.008" inches
Rod Bolt Tension: 33-38 Lbs. Ft.
Main Bearing Journal Diameter: 2.250"
Main Bearing Clearance: .001" -.003"
Crankshaft End Play: .002"-.006"
Main Bolt Tension: 65-70 Lbs. Ft.
Capacities, 4 Cylinder Models
Cooling System:
Without Heater: 11 Quarts
With Heater: 12 Quarts
Fuel Tank: 15 Gallons;
Engine Oil Refill: 4 Quarts;
Transmission:
Without Overdrive: 1-1/2 Pints
With Overdrive: 2-1/4 Pints
Rear Axle: 2 Pints
Capacities, 6 Cylinder Models
Cooling System:
Without Heater: 9 Quarts
With Heater: 10 Quarts
Fuel Tank: 15 Gallons;
Engine Oil Refill: 5 Quarts;
Transmission:
Without Overdrive: 1-1/2 Pints
With Overdrive: 2-1/4 Pints
Rear Axle: 2 Pints
Auto-Lite Distributor Specifications, 4 Cylinder:
Distributor #1AT-4008
Rotation: Counter-Clockwise
Cam Angle: 47 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .21-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 1 @ 400 RPM
Full Advance: 11 Degrees @ 2,000 RPM
Vacuum Advance Data:
Advance Starts: 1 Degree @ 5-3/8" Vacuum
Full Advance: 5 Degrees @ 8" Vacuum
Auto-Lite Distributor Specifications, 6 Cylinder:
Distributor #1AT-4007-A
Rotation: Counter-Clockwise
Cam Angle: 39 Degrees
Breaker Point Opening: .020"
Condenser Capacity: .21-.25 Mfds
Breaker Arm Spring Tension: 17-20 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degrees @ 380 RPM
Full Advance: 12 Degrees @ 1,500 RPM
Vacuum Advance Data:
Advance Starts: 1 Degrees @ 5-1/2" Vacuum
Full Advance: 6 Degrees @ 15" Vacuum
Auto-Lite Generator Specifications:
Generator #GDZ-6001D
Generator Output: 35 Amperes @ 2,250 RPM
Brush Spring Tension: 35 to 53 Ounces
Direction of Rotation: Clockwise
Field Current at 5 Volts: 1.30 to 1.50 Amperes
Regulator #VRP-6003A
Cutout Relay Data:
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"
Auto-Lite Starting Motor Specifications:
Unit #: MZ-4162
Rotation: Clockwise
Brush Spring Tension: 42-53 Ounces
No Load Test:
68 Amperes; 5.0 Volts; @ 4,000 RPM
Torque Test:
280 Amperes; 2.0 Volts; Torque 4.4 Ft Lbs
Carter Carburetor Adjustments:
Carburetor Model: YF
Carburetor #832S & #832SA & 832SB
Float Level: 5/16"
Idle Screw Setting, Turns to Open: 3/4 to 1-3/4 Turns
Metering Rod Adjustment: With throttle valve seated in carburetor bore, press down on upper end of diaphragm shaft until diaphragm bottoms in chamber. Adjust by bending lip up or down.
Fast Idle Adjustment: Hold choke in wide open position and lip on fast idle arm should contact boss on body casting. Adjust by bending at offset of fast idle link.
Fuel Pump Data:
Maximum Pressure: 2-1/2 to 3-1/2 PSI
:
Brake Specifications
Lining Material: Molded
Lining Dimensions/Wheel in Inches: 19
Width: 1-3/4",
Thickness: 3/16"
Brake Shoe Clearance: .008"
Wheel Cylinder Bore:
Front: 1"
Rear: 7/8"
Master Cylinder Bore: 1"
Wheel Alignment Specifications:
Caster: +2 Degrees
Camber: +1-1/2 Degrees
Toe-In; 1/16" to 1/8"
Toe-Out on Turns:
Outer Wheel: 18-1/2 Degrees
Inner Wheel: 20 Degrees
Kingpin Angle: 5 Degrees
Beginning Engine Numbers:
Model 4-73SW: 451-AA1-10001
Model 4X4-73SW: 451-FA1-10001
Model 4-73VJ: 451-BA1-10001
Model 6-73SW: 651-AA1-10001
Model 6-73VJ: 651-BA1-10001
Beginning Serial Numbers:
Same as Engine Number
Popular Options:
Radio and Antenna, Heater & Defroster, Large Wheel Discs,Wheel Trim Rings, Front Bumper Guards, Rear Bumper Guards, Front Grille Guard, Inside Rear View Mirrors, Outside Rear View Mirrors, Spotlight, Fog Lights, License Plate Frames, White Sidewall Tires, Heavy Duty Air Cleaner, High Compression (7.0:1) Cylinder Head, 4 Cylinder, Overdrive on Jeepster (Standard on other models).
1951 Willys Historical Data:
1951 Willys models were introduced in November 1950.
Production Total for passenger cars during 1951 was 28,266 (Model Year Production).
Promotional Model Cars Available
None
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