1940 BUICK
Models:
Buick Special, Series 40, 8 Cylinder
Buick Super, Series 50, 8 Cylinder
Buick Century, Series 60, 8 Cylinder
Buick Roadmaster, Series 70, 8 Cylinder
Buick Limited, Series 80, 8 Cylinder (133" Wheelbase)
Buick Limited, Series 90, 8 Cylinder (140" Wheelbase)
Buick Special, Series 40, 8 Cylinder
Body Data & Pricing:
4 Door Convertible Phaeton, 5 Passenger, Model 41C
Base Price: $1,355; Shipping Weight: 3,755 Pounds; Production Total: 552
4 Door Trunk Sedan, 5 Passenger, Model 41
Base Price: $996; Shipping Weight: 3,660 Pounds; Production Total: 67,308
4 Door Taxi, 5 Passenger, Model 41T
Base Price: NA; Shipping Weight: NA; Production Total: 48
2 Door Business Coupe, 2 Passenger, Model 46
Base Price: $895; Shipping Weight: 3,505 Pounds; Production Total: 12,372
2 Door Convertible Coupe, 4 Passenger, Model 46C
Base Price: $1,077; Shipping Weight: 3,665 Pounds; Production Total: 3,664
2 Door Sport Coupe, 4 Passenger, Model 46S
Base Price: $950; Shipping Weight: 3,540 Pounds; Production Total: 8,291
2 Door Trunk Sedan, 5 Passenger, Model 48
Base Price: $955; Shipping Weight: 3,605 Pounds; Production Total: 20,739
Major Specifications, Buick Special, Model 40
Wheelbase: 121"
Engine Type: Overhead Valve In-Line 8 Cylinder
Engine Bore & Stroke: 3-3/32" X 4-1/8"
Engine Displacement: 248.0 Cu. In.
Compression Ratio: 6.10:1
Taxable Horsepower: 30.63
Horsepower: 107 @ 3,400 RPM
Torque: 126 Ft Lbs @ 1,000 RPM
Carburetor: Carter, Model 440S or Stromberg AAV-16, A-19181
Rear Axle Ratio: 3.90:1
Tire Size: 6.50 X 16 Inches; Pressures: 25 Front & 30 Rear
Capacities, Buick Special, Model 40
Cooling System: 13-1/4 Quarts
Fuel Tank: 17 Gallons
Engine Oil: 6 Quarts
Grade of Oil: +32 Degrees F & Above, 20
+10 Degrees F & Above, 20W
- 10 Degrees F & Above, 10W
Transmission Capacity: 1-3/4 Pints
Grade of Oil: Summer, 90; Winter, 90
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Beginning Engine Number, Buick Special, Series 40: 4-3786214
Tune-Up Data, Buick Special, Series 40
Spark Plug Gap: .025"
Spark Plug Type: Champion J-8 or UJ-12 or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" Mark on Flywheel
Firing Order: 16258374
Tappet Clearance, Hot:
Intake: .015" Exhaust: .015"
Cylinder Head Tension: 65-70 Ft Lbs
Valve Data, Buick Special, Series 40
Tappet Clearance, Running Hot:
Intake: .015"
Exhaust: .015"
Tappet Clearance for Timing:
Intake: .015"
Exhaust: .015"
Valve Timing:
Intake Valve Opens: 13 Degrees BTDC
Exhaust Valve Closes: 22 Degrees ATDC
Valve Seat Angle:
Intake: 45 Degrees
Exhaust: 45 Degrees
Minimum Valve Spring Pressure (New Spring):
Inner Spring: 45 Pounds @ 1-5/16"
Outer Spring: 67 Pounds @ 1-19/32"
Valve Stem Clearance:
Intake: .0015"-.0035"
Exhaust: .0021"-.0039"
Piston & Ring Data, Buick Special, Series 40
Pistons Removed from Above
Piston Clearance (Minimum):
Top Land: .023"
Top of Skirt: .0018"
Fitting Pistons with Spring Scale:
Shim Thickness to Use: Should fall @ .0015" and hold @ .00225"
Pounds Pull on Scale: Use Shim Thickness Data
Width of Ring End Gap (Minimum):
Compression: .010"
Oil Control: .010"
Clearance Between Ring & Grooves:
Compression: .0015"-.003"
Oil Control: .0015"-.003"
Engine Bearing Data, Buick Special, Series 40
Camshaft End Play: .004"-.008"
Camshaft Bearing Clearance: .0005"-.0035"
Connecting Rod Bearing Journal Diameter: 1.997"-1.999"
Connecting Rod Bearing Clearance: .0008"-.0018"
Connecting Rod End Play: .005"-.010"
Connecting Rod Bolt Tension: 40-45 Ft Lb
Main Bearing Journal Diameter:
#1: 2.3095"-2.3115" #2: 2.3725"-2.3745" #3: 2.4345"-2.4365"
#4: 2.4975"-2.4995" #5: 2.5595"-2.5615"
Main Bearing Clearance: .0007"-.0022"
Crankshaft End Play: .004:-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Special, Series 40
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 22-11/16"
Width of Lining: 1-3/4"
Thickness of Lining: 3/16"
Brake Pedal Free Play: 1-1/16"
Wheel Alignment Data, Buick Special, Series 40
Caster: +3/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4 Degrees
Rear Axle Data, Buick Special, Series 40
Ring Gear & Pinion Backlash: .006"-.010"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: None
Axle Shaft End Play: .000"-.008"
Delco-Remy Generator Specifications, Series 40:
Generator # 1102663
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Generator Specifications, Series 40:
Generator # 1102662
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Starting Motor Specifications, Series 40:
Starter # 1107005
Brush Spring Tension: 24-28 Ounces
No Load Test: 65 Amperes, 5.0 Volts @ 5,000 RPM
Lock Test: 525 Amperes, 3.37 Volts; Torque: 12 Ft Lbs
Buick Super, Series 50, 8 Cylinder
Body Data & Pricing:
4 Door Trunk Sedan, 6 Passenger, Model 51
Base Price: $1,109; Shipping Weight: 3,790 Pounds; Production Total: 95,875
4 Door Convertible Phaeton, 6 Passenger, Model 51C
Base Price: $1,549; Shipping Weight: 3,895 Pounds; Production Total: 1,351
2 Door Convertible Coupe, 6 Passenger, Model 56C
Base Price: $1,211; Shipping Weight: 3,785 Pounds; Production Total: 4,764
2 Door Sport Coupe, 5 Passenger, Model 56S
Base Price: $1,058; Shipping Weight: 3,735 Pounds; Production Total: 26,251
4 Door Estate Wagon, 6 Passenger, Model 59
Base Price: $1,242; Shipping Weight: 3,870 Pounds; Production Total: 495
Major Specifications, Buick Super, Series 50
Wheelbase: 121"
Engine Type: Overhead Valve In-Line 8 Cylinder
Engine Bore & Stroke: 3-3/32" X 4-1/8"
Engine Displacement: 248.0 Cu. In.
Compression Ratio: 6.10:1
Taxable Horsepower: 30.63
Horsepower: 107 @ 3,400 RPM
Torque: 126 Ft Lbs @ 1,000 RPM
Carburetor: Carter, Model 440S or Stromberg AAV-16, A-19181
Rear Axle Ratio: 3.90:1
Tire Size: 6.50 X 16 Inches; Pressures: 25 Front & 30 Rear
Capacities, Buick Super, Model 50
Cooling System: 13-1/4 Quarts
Fuel Tank: 17 Gallons
Engine Oil: 6 Quarts
Grade of Oil: +32 Degrees F & Above, 20
+10 Degrees F & Above, 20W
- 10 Degrees F & Above, 10W
Transmission Capacity: 1-3/4 Pints
Grade of Oil: Summer, 90; Winter, 90
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Beginning Engine Number, Buick Super, Series 50: 5-3786214
Tune-Up Data, Buick Super, Series 50
Spark Plug Gap: .025"
Spark Plug Type: Champion J-8 or UJ-12 or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" Mark on Flywheel
Firing Order: 16258374
Tappet Clearance, Hot:
Intake: .015" Exhaust: .015"
Cylinder Head Tension: 65-70 Ft Lbs
Valve Data, Buick Super, Series 50
Tappet Clearance, Running Hot:
Intake: .015"
Exhaust: .015"
Tappet Clearance for Timing:
Intake: .015"
Exhaust: .015"
Valve Timing:
Intake Valve Opens: 13 Degrees BTDC
Exhaust Valve Closes: 22 Degrees ATDC
Valve Seat Angle:
Intake: 45 Degrees
Exhaust: 45 Degrees
Minimum Valve Spring Pressure (New Spring):
Inner Spring: 45 Pounds @ 1-5/16"
Outer Spring: 67 Pounds @ 1-19/32"
Valve Stem Clearance:
Intake: .0015"-.0035"
Exhaust: .0021"-.0039"
Piston & Ring Data, Buick Super, Series 50
Pistons Removed from Above
Piston Clearance (Minimum):
Top Land: .023"
Top of Skirt: .0018"
Fitting Pistons with Spring Scale:
Shim Thickness to Use: Should fall @ .0015" and hold @ .00225"
Pounds Pull on Scale: Use Shim Thickness Data
Width of Ring End Gap (Minimum):
Compression: .010"
Oil Control: .010"
Clearance Between Ring & Grooves:
Compression: .0015"-.003"
Oil Control: .0015"-.003"
Engine Bearing Data, Buick Super, Series 50
Camshaft End Play: .004"-.008"
Camshaft Bearing Clearance: .0005"-.0035"
Connecting Rod Bearing Journal Diameter: 1.997"-1.999"
Connecting Rod Bearing Clearance: .0008"-.0018"
Connecting Rod End Play: .005"-.010"
Connecting Rod Bolt Tension: 40-45 Ft Lb
Main Bearing Journal Diameter:
#1: 2.3095"-2.3115" #2: 2.3725"-2.3745" #3: 2.4345"-2.4365"
#4: 2.4975"-2.4995" #5: 2.5595"-2.5615"
Main Bearing Clearance: .0007"-.0022"
Crankshaft End Play: .004:-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Super, Series 50
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 22-11/16"
Width of Lining: 1-3/4"
Thickness of Lining: 3/16"
Brake Pedal Free Play: 7/8"
Wheel Alignment Data, Buick Super, Series 50
Caster: +3/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4 Degrees
Rear Axle Data, Buick Super, Series 50
Ring Gear & Pinion Backlash: .006"-.010"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: None
Axle Shaft End Play: .000"-.008"
Delco-Remy Generator Specifications, Series 50:
Generator # 1102662
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Starting Motor Specifications, Series 50:
Starter # 1107005
Brush Spring Tension: 24-28 Ounces
No Load Test: 65 Amperes, 5.0 Volts @ 5,000 RPM
Lock Test: 525 Amperes, 3.37 Volts; Torque: 12 Ft Lbs
Buick Century, Series 60, 8 Cylinder
Body Data & Pricing:
4 Door Sport Phaeton, 5 Passenger, Model 61C
Base Price: $1,620; Shipping Weight: 4,050 Pounds; Production Total: 194
4 Door Trunk Sedan, 5 Passenger, Model 61
Base Price: $1,211; Shipping Weight: 3,935; Production Total: 8,597
2 Door Convertible Coupe, 4 Passenger, Model 66C
Base Price: $1,343; Shipping Weight: 3,915 Pounds; Production Total: 542
2 Door Sport Coupe, 5 Passenger, Model 66S
Base Price: $1,175; Shipping Weight: 3,765 Pounds; Production Total: 96
2 Door Business Coupe, 2 Passenger, Model 66
Base Price: $1,128; Shipping Weight: 3,800; Production Total: 44
Major Specifications, Buick Century, Model 60
Wheelbase: 126"
Engine Type: Overhead Valve In-Line 8 Cylinder
Engine Bore & Stroke: 3-7/16" X 4-5/16"
Engine Displacement: 320.2 Cu. In.
Compression Ratio: 6.25:1
Taxable Horsepower: 37.81
Horsepower: 141 @ 3,600 RPM
Torque: 130 Ft Lbs @ 1,000 RPM
Carburetor: Stromberg AAV-25 or Carter 4485
Rear Axle Ratio: N/A
Tire Size: 7.00 X 15; Pressures: 25 Front & 30 Rear
Capacities, Buick Century, Model 60
Cooling System: 17 Quarts
Fuel Tank: 17 Gallons
Engine Oil: 8 Quarts
Grade of Oil: +32 Degrees F & Above, 20
+10 Degrees F & Above, 20W
- 10 Degrees F & Above, 10W
Transmission Capacity: 2-1/2 Pints
Grade of Oil: Summer, 90; Winter, 90
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Beginning Engine Number, Buick Century, Series 60: 6-3812000
Tune-Up Data, Buick Century, Series 60
Spark Plug Gap: .025"
Spark Plug Type: Champion J-8 or UJ-12 or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" on Flywheel
Firing Order: 16258374
Tappet Clearance, Hot:
Intake: .015" Exhaust: .015"
Cylinder Head Tension: 65-70 Ft Lbs
Valve Data, Buick Century, Series 60
Tappet Clearance, Running Hot:
Intake: .015"
Exhaust: .015"
Tappet Clearance for Timing:
Intake: .015"
Exhaust: .015"
Valve Timing:
Intake Valve Opens: 14 Degrees BTDC
Exhaust Valve Closes: 25 Degrees ATDC
Valve Seat Angle:
Intake: 45 Degrees
Exhaust: 45 Degrees
Minimum Valve Spring Pressure (New Springs):
Inner Spring: 45 Pounds @ 1-5/16"
Outer Spring: 67 Pounds @ 1-19/32"
Valve Stem Clearance:
Intake: .0015"-.0035"
Exhaust: .0021"-.0039"
Piston & Ring Data, Buick Century, Series 60
Pistons Removed from Above
Piston Clearance (Minimum):
Top Land: .026"
Top of Skirt: .002"
Fitting Pistons with Spring Scale:
Shim Thickness to Use: Should fall @ .0015" and hold @ .00225"
Pounds Pull on Scale: Use Shim Thickness Data
Width of Ring End Gap (Minimum):
Compression: .010"
Oil Control: .010"
Clearance Between Ring & Grooves:
Compression: .0015"-.003"
Oil Control: .0015"-.003"
Engine Bearing Data, Buick Century, Series 60
Camshaft End Play: .004"-.008"
Camshaft Bearing Clearance: .0005"-.0035"
Conecting Rod Bearing Journal Diameter: 2.248"-2.249"
Connecting Rod Bearing Clearance: .0008"-.0018"
Connecting Rod End Play: .005"-.010"
Connecting Rod Bearing Tension: 60-65 Ft Lbs
Main Bearing Journal Diameter:
#1: 2.5605"-2.5615" #2: 2.6235"-2.6245" #3: 2.6855"-2.6865"
#4: 2.7485"-2.7495" #5: 2.8105"-2.8115"
Main Bearing Clearance: .0007"-.0022"
Crankshaft End Play: .004"-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Century, Series 60
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 22-15/16"
Width of Lining: 2-1/4"
Thickness of Lining: 3/16"
Brake Pedal Free Play: 1-1/16"
Wheel Alignment Data, Buick Century, Series 60
Caster: +3/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4 Degrees
Rear Axle Data, Buick Century, Series 60
Ring Gear & Pinion Backlash: .006"-.010"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: None
Axle Shaft End Play: .000"-.008"
Delco-Remy Generator Specifications, Series 60:
Generator # 1102668
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Starting Motor Specifications, Series 60:
Starter # 1107908
Brush Spring Tension: 24-28 Ounces
No Load Test: 60 Amperes, 5.0 Volts @ 6,000 RPM
Lock Test: 600 Amperes, 3.0 Volts; Torque: 16 Ft Lbs
Buick Roadmaster, Series 70, 8 Cylinder
Body Data & Pricing:
4 Door Convertible Phaeton, 6 Passenger, Model 71C
Base Price: $1,768; Shipping Weight: 4,195 Pounds; Production Total: 235
4 Door Trunk Sedan, 6 Passenger, Model 71
Base Price: $1,359; Shipping Weight: 4,045 Pounds; Production Total: 13,583
4 Door Convertible Coupe, 6 Passenger, Model 76C
Base Price: $1,431; Shipping Weight: 4,055 Pounds; Production Total: 606
2 Door Sport Coupe, 5 Passenger, Model 76S
Base Price: $1,277; Shipping Weight: 3,990 Pounds; Production Total: 3,921
Major Specifications, Buick Roadmaster, Model 70
Wheelbase: 126"
Engine Type: Overhead Valve In-Line 8 Cylinder
Engine Bore & Stroke: 3-7/16" X 4-5/16"
Engine Displacement: 320.2 Cu. In.
Compression Ratio: 6.25:1
Taxable Horsepower: 37.81
Horsepower: 141 @ 3,600 RPM
Torque: 130 Ft Lbs @ 1,000 RPM
Carburetor: Stromberg AAV-25, A-19182 or Carter 4485
Rear Axle Ratio: NA
Tire Size: 7.00 X 15 Inches; Pressures: 25 Front & 30 Rear
Capacities, Buick Roadmaster, Model 70
Cooling System: 17 Quarts
Fuel Tank: 17 Gallons
Engine Oil: 8 Quarts
Grade of Oil: +32 Degrees F & Above, 20
+10 Degrees F & Above, 20W
- 10 Degrees F & Above, 10W
Transmission Capacity: 2-1/2 Pints
Grade of Oil: Summer, 90; Winter, 90
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Beginning Engine Number, Buick Roadmaster, Series 70: 8-3786214
Tune-Up Data, Buick Roadmaster, Series 70
Spark Plug Gap: .025"
Spark Plug Type: Champion J-8 or UJ-12 or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" Mark on Flywheel
Firing Order: 16258374
Tappet Clearance, Hot:
Intake: .015" Exhaust: .015"
Cylinder Heat Tension: 65-70 Ft Lbs
Valve Data, Buick Roadmaster, Series 70
Tappet Clearance, Running Hot:
Intake: .015"
Exhaust: .015"
Tappet Clearance for Timing:
Intake: .015"
Ehaust: .015"
Valve Timing:
Intake Valve Opens: 14 Degrees BTDC
Exhaust Valve Closes: 25 Degrees ATDC
Valve Seat Angle:
Intake: 45 Degrees
Exhaust: 45 Degrees
Minimum Valve Spring Pressure (New Springs):
Inner Spring: 45 Pounds @ 1-5/16"
Outer Spring: 67 Pounds @ 1-19/32"
Valve Stem Clearance:
Intake: .0015:-.0035"
Exhaust: .0021"-.0039"
Piston & Ring Data, Buick Roadmaster, Series 70
Piston Removed from Above
Piston Clearance (Minimum):
Top Land: .026"
Top of Skirt: .002"
Fitting Pistons with Sring Scale:
Shim Thickness to Use: Should fall @ .0015" and hold @ .00225"
Pounds Pull on Scale: Use Shim thickness Data
Width of Ring End Gap (Minimum):
Compression: .010"
Oil Control: .010"
Clearance Between Ring & Grooves:
Compression: .0015"-.003"
Oil Control: .0015"-.003"
Engine Bearing Data, Buick Roadmaster, Series 70
Camshaft End Play: .004"-.008"
Camshaft Bearing Clearance: .0005"-.0035"
Connecting Rod Bearing Journal Diameter: 2.248"-2.249"
Connecting Rod Bearing Clearance: .0008"-.0018"
Connecting Rod End Play: .005"-.010"
Connecting Rod Bolt Tension: 60-65 Ft Lbs
Main Bearing Journal Diameter:
#1: 2.5605"-2.5615" #2: 2.6235"-2.6245" #3: 2.6855"-2.6865"
#4: 2.7485"-2.7495" #5: 2.8105"-2.8115"
Main Bearing Clearance: .0007"-.0022"
Crankshaft End Play: .004"-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Roadmaster, Series 70
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 22-15/16"
Width of Lining: 2-1/4"
Thickness of Lining: 3/16"
Brake Pedal Free Play: 7/8"
Wheel Alignment, Buick Roadmaster, Series 70
Caster: +3/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4 Degrees
Rear Axle Data, Buick Roadmaster, Series 70
Ring Gear & Pinion Backlash: .006"-.010"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: None
Axle Shaft End Play: .000"-.008"
Delco-Remy Generator Specifications, Series 70:
Generator # 1102668
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Starting Motor Specifications, Series 70:
Starter # 1107908
Brush Spring Tension: 24-28 Ounces
No Load Test: 60 Amperes, 5.0 Volts @ 6,000 RPM
Lock Test: 600 Amperes, 3.0 Volts; Torque: 16 Ft Lbs
Buick Limited, Series 80, 8 Cylinder (133" Wheelbase)
4 Door Convertible Phaeton, 6 Passenger, Model 80C
Base Price: $1.952; Shipping Weight: 4,550 Pounds; Production Total: 7
4 Door Trunk Sedan, 6 Passenger, Model 81
Base Price: $1,553; Shipping Weight: 4,400 Pounds; Production Total: 3,810
4 Door Fastback Convertible Phaeton, 6 Passenger, Model 81C
Base Price: $1,952; Shipping Weight: 4,540 Pounds; Production Total: 230
4 Door Formal Sedan, 6 Passenger, Model 81F
Base Price: $1,727; Shipping Weight: 4,455 Pounds; Production Total: 248
4 Door Sport Sedan, 6 Passenger, Model 87
Base Price: $1,553; Shipping Weight: 4,380 Pounds; Production Total: 14
4 Door Formal Sport Sedan, 6 Passenger, Model 87F
Base Price: $1,727; Shipping Weight: 4,435 Pounds; Production Total: 7
Major Specifications, Buick Limited, Model 80
Wheelbase: 133"
Engine Type: Overhead Valve In-Line 8 Cylinder
Engine Bore & Stroke: 3-7/16" X 4-5/16"
Engine Displacement: 320.2 Cu. In.
Compression Ratio: 6.25:1
Taxable Horsepower: 37.81
Horsepower: 141 @ 3,600 RPM
Torque: 130 Ft Lbs @ 1,000 RPM
Carburetor: Stromberg AAV-25 A-19182 or Carter 4485
Rear Axle Ratio: NA
Tire Size: 7.50 X 16 Inches; Pressures: 25 Front & 30 Rear
Capacities, Buick Limited, Series 80
Cooling System: 17 Quarts
Fuel Tank: 19 Gallons
Engine Oil: 8 Quarts
Grade of Oil: +32 Degrees F & Above, 20
+10 Degrees F & Above, 20W
- 10 Degrees F & Above, 10W
Transmission Capacity: 2-1/2 Pints
Grade of Oil: Summer, 90; Winter 90
Rear Axle Capacity: 4 Pints
Grade of Oil: Summer, 90H; Winter 90H
Beginning Engine Number, Buick Limited, Series 80: 8-3812000
Tune-Up Data, Buick Limited, Series 80
Spark Plug Gap: .025"
Spark Plug Type: Champion J-8 or UJ-12 or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" Mark on Flywheel
Firing Order: 16258374
Tappet Clearance, Hot:
Intake: .015"
Exhaust: .015"
Cylinder Head Tension: 65-70 Ft Lbs
Valve Data, Buick Limited, Series 80
Tappet Clearance, Running Hot:
Intake: .015"
Exhaust: .015"
Tappet Clearance for Timing:
Intake: .015"
Exhaust: .015"
Valve Timing:
Intake Valve Opens: 14 Degrees BTDC
Exhaust Valve Closes: 25 Degrees ATDC
Valve Seat Angle:
Intake: 45 Degrees
Exhaust: 45 Degrees
Minimum Valve Spring Pressure (New Springs):
Inner Spring: 45 Pounds @ 1-5/16"
Outer Spring: 67 Pounds @ 1-19/32"
Valve Stem Clearance:
Intake: .0015"-.0035"
Exhaust: .0021"-.0039"
Piston & Ring Data, Buick Limited, Series 80
Piston Removed from Above
Piston Clearance (Minimum):
Top of Land: .026"
Top of Skirt: .002"
Fitting Pistons with Spring Scale:
Shim Thickness to Use: Should fall @ .0015" and hold @ .00225"
Pounds Pull on Scale: Use Shim Thickness Data
Width of Ring End Gap (Minimum):
Compression: .010"
Oil Control: .010"
Clearance Between Ring & Grooves:
Compression: .0015"-.003"
Oil Control: .0015"-..003"
Engine Bearing Data, Buick Limited, Series 80
Camshaft End Play: .004"-.008"
Camshaft Bearing Clearance: .0005"-.0035"
Connecting Rod Bearing Journal Diameter: 2.248"-2.249"
Connecting Rod Bearing Clearance: .008"-.018"
Conectng Rod End Play: .005"-.010"
Connecting Rod Bolt Tension: 60-65 Ft Lbs
Main Bearing Journal Diameter:
#1: 2.5605"-2.5615" #2: 2.6235"-2.6245" #3: 2.6855"-2.6865"
#4: 2.7485"-2.7495" #5: 2.8105"-2.8115"
Main Bearing Clearance: .0007:-.0022"
Crankshaft End Play: .004"-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Limited, Series 80
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 26-13/16"
Width of Lining: 2"
Thickness of Lining: 1/4"
Wheel Allignment Data, Buick Limited, Series 80
Caster: - 7/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4-1/2 Degrees
Rear Axle Data, Buick Limited, Series 80
Ring Gear & Pinion Backlash: .006"-.010"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: None
Axle Shaft End Play: .000"-.008"
Delco-Remy Generator Specifications, Series 80:
Generator # 1102668
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Starting Motor Specifications, Series 80:
Starter # 1107908
Brush Spring Tension: 24-28 Ounces
No Load Test: 60 Amperes, 5.0 Volts @ 6,000 RPM
Lock Test: 600 Amperes, 3.0 Volts; Torque: 16 Ft Lbs
Buick Limited, Series 90, 8 Cylinder (140" Wheelbase)
Body Data & Pricing:
4 Door Trunk Sedan, 8 Passenger, Model 90
Base Price: $2,096; Shipping Weight: 4,645 Pounds; Production Total: 796
4 Door Limousine, 8 Passenger, Model 90L
Base Price: $2,199; Shipping Weight: 4,705 Pounds; Production Total: 526
4 Door Trunk Sedan, 6 Passenger, Model 91
Base Price: $1,942; Shipping Weight: 4,590 Pounds; Production Total: 417
Major Specifications, Buick Limited, Model 90
Wheelbase: 140"
Engine Type: Overhead Valve In-Line 8 Cylinder
Engine Bore & Stroke: 3-7/16" X 4-5/16"
Engine Displacement: 320.2 Cu. In.
Compression Ratio: 6.25:1
Taxable Horsepower: 37.81
Horsepower: 141 @ 3,600 RPM
Torque: 130 Ft Lbs @ 1,000 RPM
Carburetor: Stromberg AAV-25 A-19182 or Carter 4485
Rear Axle Ratio: NA
Tire Size: 7.50 X 16 Inches; Pressures: 25 Front & 30 Rear
Capacities, Buick Limited, Model 90
Cooling System: 17 Quarts
Fuel Tank: 19 Gallons
Engine Oil: 8 Quarts
Grade of Oil: +32 Degrees F & Above, 20
+10 Degrees F & Above, 20W
- 10 Degrees F & Above, 10W
Transmission Capacity: 2-1/2 Pints
Grade of Oil: Summer, 90; Winter 90
Rear Axle Capacity: 4 Pints
Grade of Oil: Summer, 90H; Winter 90H
Beginning Engine Number, Buick Limited, Series 90: 9-3572652
Tune-Up Data, Buick Limited, Series 90
Spark Plug Gap: .025"
Spark Plug Type: Champion J-8 or UJ-12 or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" Mark on Flywheel
Firing Order: 16258374
Tappet Clearance, Hot:
Intake: .015"
Exhaust: .015"
Cylinder Head Tension: 65-70 Ft Lbs
Valve Data, Buick Limited, Series 90
Tappet Clearance, Running Hot:
Intake: .015"
Exhaust: .015"
Tappet Clearance for Timing:
Intake: .015"
Exhaust: .015"
Valve Timing:
Intake Valve Opens: 14 Degrees BTDC
Exhaust Valve Closes: 25 Degrees ATDC
Valve Seat Angle:
Intake: 45 Degrees
Exhaust: 45 Degrees
Minimum Valve Spring Pressure (New Springs):
Inner Spring: 45 Pounds @ 1-5/16"
Outer Spring: 67 Pounds @ 1-19/32"
Valve Stem Clearance:
Intake: .0015"-.0035"
Exhaust: .0021"-.0039"
Piston & Ring Data, Buick Limited, Series 90
Piston Removed from Above
Piston Clearance (Minimum):
Top of Land: .026"
Top of Skirt: .002"
Fitting Pistons with Spring Scale:
Shim Thickness to Use: Should fall @ .0015" and hold @ .00225"
Pounds Pull on Scale: Use Shim Thickness Data
Width of Ring End Gap (Minimum):
Compression: .010"
Oil Control: .010"
Clearance Between Ring & Grooves:
Compression: .0015"-.003"
Oil Control: .0015"-..003"
Engine Bearing Data, Buick Limited, Series 90
Camshaft End Play: .004"-.008"
Camshaft Bearing Clearance: .0005"-.0035"
Connecting Rod Bearing Journal Diameter: 2.248"-2.249"
Connecting Rod Bearing Clearance: .008"-.018"
Conectng Rod End Play: .005"-.010"
Connecting Rod Bolt Tension: 60-65 Ft Lbs
Main Bearing Journal Diameter:
#1: 2.5605"-2.5615" #2: 2.6235"-2.6245" #3: 2.6855"-2.6865"
#4: 2.7485"-2.7495" #5: 2.8105"-2.8115"
Main Bearing Clearance: .0007:-.0022"
Crankshaft End Play: .004"-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Limited, Series 90
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 26-13/16"
Width of Lining: 2"
Thickness of Lining: 1/4"
Brake Pedal Free Play: 7/8"
Wheel Allignment Data, Buick Limited, Series 90
Caster: - 7/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4-1/2 Degrees
Rear Axle Data, Buick Limited, Series 90
Ring Gear & Pinion Backlash: .006"-.010"
Drive Pinion Adjustment: Shims
Drive Pinion Bearing Adjustment: None
Axle Shaft End Play: .000"-.008"
Delco-Remy Distributor Specifications, All Series:
Distributor # 1110801
Cam Angle: 25 Degrees
Point Opening: .015"
Condensor Capacity: .20-.25 Mfds
Breker Arm Spring Tension: 19-23 Ounces
Centrifugal Advance Data:
Advance Starts: 1 Degree @ 250 RPM
Full Advance: 13 Degrees @ 1,500 RPM
Vacuum Advance Data
Inches of Vacuum to Start Plunger Movement: 5-7
Inches of Vacuum for Full Plunger Travel: 10-13
Maximum Vacuum Advance: 5-1/2 Degrees
Delco-Remy Generator Specifications, Series 90:
Generator # 1102668
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Generator Specifications, Series 90:
Generator # 1102669
Brush Spring Tension
Main: 25
Direction of Rotation: Clockwise
Field Current @ 6 Volts: 1.75-1.9 Amperes
Maximum Cold Output:
30 Amperes; 8.0 Volts @ 1,825 RPM
Maximum Output: Controlled by Current Regulator
Delco-Remy Starting Motor Specifications, Series 90:
Starter # 1107908
Brush Spring Tension: 24-28 Ounces
No Load Test: 60 Amperes, 5.0 Volts @ 6,000 RPM
Lock Test: 600 Amperes, 3.0 Volts; Torque: 16 Ft Lbs
Delco-Remy Regulator Specifications, All Series:
Regulator Type: Voltage & Current
Regulator # 1118201
Ground Polarity: Negative
Voltage to Close Relay Points: 6.2-6.7 Volts
Amperage to Open Relay Points: 0-4.0 Amperes
Maximum Operating Amperage: 34-36 Amperes
Maximum Operating Voltage (Hot): 7.2-7.4 Volts
Stromberg Carburetor Adjustments, Series 40 & 50:
Carburetor Model: AAV-16
Carburetor Part # A-19191
Code # 7-32
Repair Kit # RK-72
Fuel Level: Fuel should be at level of sight plug hole, engine idling
Throttle Position for Economizer Valve: Controlled by manifold vacuum
Throttle Valve Location for Idle: .022"
Throttle Valve Location for Vacuum Spark Control: .041"
Fast Idle Setting: 53
Choke Unloader Setting: 11/64"
Stromberg Carburetor Adjustments, Series 60, 70, 80, & 90:
Carburetor Model: AAV-26
Carburetor Part # A-19192
Code # 7-33
Repair Kit # RK-74
Fuel Level: Fuel should be at level of sight plug hole, engine idling
Throttle Position for Economizer Valve: Controlled by manifold vacuum
Throttle Valve Location for Idle: .022"
Throttle Valve Location for Vacuum Spark Control: .055"
Fast Idle Setting: 53
Choke Unloader Setting: 11/64"
Stromberg Carburetor Adjustments, Series 60, 70, 80, & 90:
Carburetor Model: AAV-26
Carburetor Part # A-19182
Code # 7-34
Repair Kit # RK-73
Fuel Level: Fuel should be at level of sight plug hole, engine idling
Throttle Position for Economizer Valve: Controlled by manifold vacuum
Throttle Valve Location for Idle: .022"
Throttle Valve Location for Vacuum Spark Control: .055"
Fast Idle Setting: 53
Choke Unloader Setting: 11/64"
Carter Carburetor Specifications, Series 40 & 50:
Carburetor Model #WDO
Carburetor Part # 419S
Casting # 225
Repair Kit # 1061
Float Level: 3/16"
Idle Screw Setting, 3/8-1 Turns to Open
Metering Rod Gauge: T109-113
Pump Travel: 21/64", Medium Stroke
Anit-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .018"
Choke Lockout Adjustment: None
Carter Carburetor Specifications, Series 40 & 50:
Carburetor Model #WDO
Carburetor Part # 440S
Casting # 225
Repair Kit # 1062A
Float Level: 3/16"
Idle Screw Setting, 1/2-1-1/4 Turns to Open
Metering Rod Gauge: T109-113
Pump Travel: 21/64", Medium Stroke
Anit-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .018"
Choke Lockout Adjustment: None
Carter Carburetor Specifications, Series 60 & 70:
Carburetor Model #WDO
Carburetor Part # 448S
Casting # 227
Repair Kit # Not Available
Float Level: 3/16"
Idle Screw Setting, 1/2-1-1/4 Turns to Open
Metering Rod Gauge: T109-113
Pump Travel: 21/64", Medium Stroke
Anit-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .030"
Choke Lockout Adjustment: None
Carter Carburetor Specifications, Series 40 & 50:
Carburetor Model #WDO
Carburetor Part # 474S
Casting # 311
Repair Kit # 1062A
Float Level: 3/16"
Idle Screw Setting, 1/2-1-1/4 Turns to Open
Metering Rod Gauge: T109-113
Pump Travel: 21/64", Medium Stroke
Anit-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .030"
Choke Lockout Adjustment: None
Fuel Pump Data:
Pump Model: AJ
Maximum Pressure: 4 PSI
Dash Gauge Manufacturer:
Gasolline, Oil Pressure, Temperature, & Ammeter: AC
1940 Buick Beginning Serial Numbers, All Series:
1-3596807, Flint Michigan
2-3601856, Southgate, California
3-3611856, Linden, New Jersey
Popular Options, All Series:
Seat Covers, Front Bumper Guard, Fog Lights, Roof Mounted Radio Antenna for Closed Cars, Power Antenna for Open Cars, Sonomatic Radio, Fender Skirts, White Side Wall Tires, Underseat Heater & Defroster, DeLuxe Steering Wheel, Rear Seat Radio (Model 90-L), Electric Clock (Series 40 & 50), Radiator Insect Screen, Winter Grille Cover, Folding Rear Center Guard, Vanity Visor Mirrors
1940 Buick Historical Data:
Model Year introduction of the 1940 Buick was in September 22, 1939..
Model Year Production: 310,995
Sealed Beam Headlamps were standard on all model Buicks.
A new feature was directional signals.
This is the last year in which Buick offered Side Mounts.
On November 18, 1940, the 4 millionth Buick (a 1941 Model) was produced.
1940 Buick Promotional Model Cars:
Pot Metal: 1940 Buick 4 Door Sedan
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