1941 WILLYS

1941 WILLYS

Model Designations:

Willys Americar, Model 441, 4 Cylinder

Willys, Model 441, 4 Cylinder Body Styles

Speedway Coupe, Base Price: $634

Speedway Sedan, Base Price: $674

Speedway DeLuxe Coupe, Base Price: $689

Speedway DeLuxe Sedan, Base Price: $720

Speedway DeLuxe Station Wagon, Base Price: $916

Plainsman Coupe, Base Price: $740

Plainsman Sedan, Base Price: $771

General Specifications

Wheelbase: 104 Inches

Engine Type: Inline 4, L-Head

Bore & Stroke: 3-1/8" X 4-3/8"

Engine Displacement: 134.2 Cu. In.

Compresssion Ratio: 6.48:1

Taxable Horsepower: 15.63

Horsepower: 63 @ 3,800 RPM

Torque: Not Available

Rear Axle Ratio: Not Available

Carburetor: Not Available .

Tire Size: 5.50 x 16 inches; Inflation Pressure, Front 26, Rear, 26

Tune Up Specifications

Spark Plug: Gap .025"

Spark Plug Type: Champion J-8 (2 Rib), J-11, or Equivalent

Point Gap: .020"

Distributor Cam Angle: 41 degrees

Ignition Timing: Early Models: "IGN" Mark on Flywheel

Late Models: 5 Degree Mark on Flywheel

Firing Order: 1342

Tappet Clearance, Hot: Intake .014", Exhaust .014"

Cylinder Head Torque: 60-65 Ft Lbs

Carburetor Specifications:

Information Not Available

Valve Specifications

Tappet Clearance, Running Hot: Intake .014"; Exhaust .014"

Clearance for Timing: Intake: .020"; Exhaust: .020"

Valve Timing: Intake Opens 9 Degrees Before Top Dead Center

Exhaust Closes 12 degrees After Top Dead Center

Valve Seat Angle: Intake 45 degrees; Exhaust 45 degrees,

Valve Spring Pressure: 53 Lbs @ 2-7/64 inches (New Springs)

Valve Stem Clearance: Intake .0015"-.003"

Exhaust .002"-.004"

Piston & Ring Data

Piston Removal: From Above

Piston Clearance (Minimum):

Top Land Inch .020"

Top of Skirt, Inch: .003"

Fitting Pistons with Spring Scale:

Shim Thickness: .003 using a 3/4" wide feeler gauge

Pounds Pull on Scale: 5 to 10

Width of Ring End Gap (Minimum):

Compression Ring: .008"

Oil Ring: .008"

Clearance Between Ring & Grooves:

Compression Ring: .0005"-.001"

Oil Control Ring: .001"-.0015"

Engine Bearing Data

Camshaft End Play: Automatically controlled by spring & plunger at front

Camshaft Bearing Clearance: .002"-.0035"

Rod Journal Diameter: 1.9375"-1.9385"

Rod Bearing Clearance: .001"-.0025"

Rod End Play: .005"-.009" inches

Rod Bolt Tension: 50-55 Lbs. Ft.

Main Bearing Journal Diameter: 2.3335"-2.3340"

Main Bearing Clearance: .001" -.0025"

Crankshaft End Play: .004"-.008"

Main Bolt Tension: 60-70 Lbs. Ft.

Capacities

Cooling System: 11-3/4 Quarts

Fuel Tank: 11-1/2 Gallons;

Engine Oil Refill: 4 Quarts;

Grade of Oil: Above +32F 20;

Above +10F 20W;

Above -10F 10W

Transmission: 1 Pint, Without Overdrive. 3 Pints With Overdrive

Grade of Oil: Summer 90, Winter 90

Rear Axle: 2 Pints

Grade of Oil: Summer 90H, Winter 90H

Beginning Engine Numbers: 50001

Beginning Serial Numbers:

Brake Specifications

Lining Material: Molded

Lining Dimensions/Wheel in Inches: 18-5/8"

Width: 1-3/4",

Thickness: 3/16"

Pedal Free Play: 1/2"

Wheel Alignment Specifications

Caster: +3 Degrees

Camber: +2 Degrees

Toe In; 3/32"

Kingpin Angle: 7-1/2 Degrees

Rear Axle Data

Ring Gear & Pinion Backlash: .006"-.008"

Drive Pinion Adjustment: Shims

Drive Pinion Bearing Adjustment: Shims

Axle Shaft End Play: .004"-.006"

Auto-Lite Distributor Specifications:

Distributor #1GW-4129

Cam Angle: 41 Degrees

Breaker Point Opening: .020"

Condenser Capacity: .20-.25 Mfds

Breaker Arm Spring Tension: 17-20 Ounces

Centrifugal Advance Data:

Advance Starts: 2 Degrees @ 550 RPM

Full Advance: 9-1/2 Degrees @ 1,500 RPM

Vacuum Advance Data:

Advance Starts: 2 Degrees @ 5-3/4" Vacuum

Full Advance: 10 Degrees @ 15" Vacuum

Auto-Lite Generator Specifications:

Generator #GCJ-4811A

Brush Spring Tension:

Main: 53 Ounces (Maximum)

Third: 53 Ounces (Maximum)

Direction of Rotation: Clockwise

Field Current at 6 Volts: 1.90-2.10 Amperes

Low Output Test: 8 Amperes, 8 Volts @ 1,135 RPM

Maximum Output: 26 Amperes, 8 Volts

Auto-Lite Regulator Specifications:

Regulator Type: Voltage

Regulator Number: VRR-4004A

Ground Polarity: Negative

Voltage to Close Points: 6.4-7.0

Amperage to Open Relay Points: 0.5-3.0

Maximum Operating Amperage: 15 Amperes

Maximum Operating Voltage:

Before #8R-000001: 7.65 Volts

#8R-000001 & Later: 7.45 Volts

Auto-Lite Starting Motor Specifications:

Unit #: MZ-4093

Brush Spring Tension: 42-53 Ounces

No Load Test:

70 Amperes; 5.5 Volts; @ 4,300 RPM

Lock Test:

560 Amperes; 4.0 Volts; Torque 11.8 Ft Lbs

Unit #: MZ-4099

Brush Spring Tension: 42-53 Ounces

No Load Test:

70 Amperes; 5.5 Volts; @ 4,300 RPM

Lock Test:

560 Amperes; 4.0 Volts; Torque 11.8 Ft Lbs

Carburetor Adjustments:

Information Not Available

Fuel Pump Data:

Pump Model: AF

Maximum Pressure: 3 PSI

Dash Gauge Manufacturers:

Gasoline: King-Seeley

Temperature: King-Seeley

Oil Pressure: King-Seeley

Ammeter: King-Seeley