1947 BUICK
Models:
Buick Special, Series 40, 8 Cylinder
Buick Super, Series 50, 8 Cylinder
Buick Roadmaster, Series 70, 8 Cylinder
Buick Special, Series 40 8 Cylinder:
Body Data & Pricing:
4 Door Sedan, 6 Passenger, Model 41, Body #47-4409
Base Price: $1,673; Shipping Weight: 3,720 Pounds; Production Total: 18,431
2 Door Sedanette, 6 Passenger, Model 46, Body #47-4407
Base Price: $1,611; Shipping Weight: 3,670 Pounds; Production Total: 14,603
Buick Super, Series 50, 8 Cylinder
Body Data & Pricing:
4 Door Sedan, 6 Passenger, Model 51, Body #47-4569
Base Price: $1,929; Shipping Weight: 3,920 Pounds; Production Total: 83,576
2 Door Sedanette, 6 Passenger, Model 56S, Body #47-4507
Base Price: $1,843; Shipping Weight: 3,795 Pounds; Production Total: 46,917
2 Door Convertible Coupe, 6 Passenger, Model 56C, Body #47-4567
Base Price: $2,333; Shipping Weight: 4,050 Pounds; Production Total: 28,297
4 Door Station Wagon, 6 Passenger, Model 59, Body #(Ionia)
Base Price: $2,594; Shipping Weight: 4,170 Pounds; Production Total: 798
Buick Roadmaster, Series 70, 8 Cylinder
Body Data & Pricing:
4 Door Sedan, 6 Passenger, Model 71, Body #47-4769
Base Price: $2,232; Shipping Weight: 4,190 Pounds; Production Total: 47,152
2 Door Sedanette, 6 Passenger, Model 76S, Body #47-4707
Base Price: $2,131; Shipping Weight: 4,095 Pounds; Production Total: 19,212
2 Door Convertible Coupe, 6 Passenger, Model 76C, Body #47-4767
Base Price: $2,651; Shipping Weight: 4,345 Pounds; Production Total: 12,074
4 Door Station Wagon, 6 Passenger, Model 79, Body #(Ionia)
Base Price: $3,249; Shipping Weight: 4,445 Pounds; Production Total: 300
Major Specifications, Buick Special, Model 40:
Wheelbase: 121", Model 40
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: 6.30:1
Torque: 206 Ft. Lbs. @ 2,000 RPM
Taxable Horsepower: 30.63
Horsepower: 110 @ 3,600 RPM
Normal Oil Pressure: 45 PSI
Carburetor: Carter, Model 608 or Model 663; or Stromberg Model AAV-16, #380106
Rear Axle Ratio: Not Available
Tire Size: 6.50 X 16 Inches; Pressures: 25 Front & 25 Rear
Major Specifications, Buick Super, Series 50
Wheelbase: 124"
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: 6.30:1
Taxable Horsepower: 30.63
Horsepower: 110 @ 3,600 RPM
Torque: 206 Ft. Lbs. @ 2,000 RPM
Normal Oil Pressure: 45 PSI
Carburetor: Carter, Model 608 or Model 663; or Stromberg Model AAV-16, #380106
Rear Axle Ratio: Not Available
Tire Size: 6.50 X 16 Inches; Pressures: 25 Front & 25 Rear
Major Specifications, Buick Roadmaster, Model 70
Wheelbase: 129"
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: 6.60:1
Taxable Horsepower: 37.81
Horsepower: 144 @ 3,600 RPM
Torque: 276 Ft. Lbs. @ 2,000 RPM
Carburetor: Stromberg AAV-26, Number 380097 or Carter Model 609 or Model 664
Rear Axle Ratio: Not Available
Tire Size: 7.00 X 15 Inches; Pressures: 25 Front & 25 Rear
Capacities, Buick Special, Model 40:
Cooling System: 13 Quarts
Fuel Tank: 19 Gallons
Engine Oil: 5-1/2 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, 90H; Winter, 90H
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Capacities, Buick Super, Model 50
Cooling System: 13 Quarts
Fuel Tank: 19 Gallons
Engine Oil: 5-1/2 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, 90H; Winter, 90H
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Capacities, Buick Roadmaster, Model 70
Cooling System: 16-3/4 Quarts
Fuel Tank: 19 Gallons
Engine Oil: 7 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, 90H; Winter, 90H
Rear Axle Capacity: 3 Pints
Grade of Oil: Summer, 90H; Winter, 90H
Tune-Up Data, Buick, Special, Super, & Roadmaster; Series 40, 50, & 70:
Spark Plug Gap: .025"
Spark Plug Type: AC 48, Champion UJ-18Y or J-18Y or equivalent
Ignition Point Gap: .015"
Cam Angle: 25 Degrees
Ignition Timing Mark & Location: "ADV" Mark on Flywheel
Firing Order: 1-6-2-5-8-3-7-4
Tappet Clearance, Hot:
Intake: .015" Exhaust: .015"
Cylinder Head Tension: 65-70 Ft Lbs
Engine Idle Speed: 450 RPM
Compression Pressure @ Cranking Speed: 112 PSI
Valve Data, Buick Special, Series 40 & 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"
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 Special, Series 40 & Super, Series 50:
Pistons Removed from Above
Piston Clearance (Minimum):
Top Land: .023"
Top of Skirt: .0021"
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"
Piston & Ring Data, Buick Roadmaster, Series 70
Piston Removed from Above
Piston Clearance (Minimum):
Top Land: .026"
Top of Skirt: .0023"
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 Special, Series 40 & 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
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"-.0025"
Crankshaft End Play: .004"-.008"
Main Bolt Tension: 90-100 Ft Lbs
Brake Data, Buick Special, Series 40, & Super, Series 50:
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 23-1/16"
Width of Lining: 1-3/4"
Thickness of Lining: 3/16"
Brake Pedal Free Play: 1"
Brake Data, Buick Roadmaster, Series 70
Lining Material: Primary Shoe, Woven; Secondary Shoe, Molded
Length of Lining Per Wheel: 23-1/16"
Width of Lining: 2-1/4"
Thickness of Lining: 3/16"
Brake Pedal Free Play: 1"
Wheel Alignment Data, All Series:
Caster: +3/8 Degrees
Camber: +3/8 Degrees
Toe In: 1/32"
Kingpin Inclination: 4-1/4 Degrees
Rear Axle Data, All Series:
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 40 & 50:
Generator # 1102679
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 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 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
Delco-Remy Starting Motor Specifications, Series 40 & 50:
Starter # 1107149
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
Delco-Remy Starting Motor Specifications, Series 70:
Starter # 1107929
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
Stromberg Carburetor Adjustments, Series 70:
Carburetor Model: AAV-26
Carburetor Part # 380097
Code # 7-57
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 #WCD
Carburetor Part # 608S-SA
Casting # 324 or 546
Repair Kit # 1364B
Float Level: 3/16"
Idle Screw Setting, 1/2-1 Turns to Open
Metering Rod Gauge: T109-152
Pump Travel: 21/64"
Anit-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .012"
Choke Lockout Adjustment: None
Carter Carburetor Specifications, Series 70:
Carburetor Model #WCD
Carburetor Part # 609S-SA
Casting # 402 or 548
Repair Kit # 1365B
Float Level: 3/16"
Idle Screw Setting, 3/4-1-3/4 Turns to Open
Metering Rod Gauge: T109-163
Pump Travel: 21/64"
Anit-Percolator Setting: None
Unloader Setting: 3/16"
Fast Idle Setting: .018"
Choke Lockout Adjustment: None
Fuel Pump Data:
Pump Model: AJ
Maximum Pressure: 4 PSI
Dash Gauge Manufacturer:
Gasoline, Oil Pressure, Temperature, & Ammeter: AC
1947 Buick Beginning Engine Numbers:
Series 40: 4-4558037 - Continued from 1946
Series 50: 5-4558037 - Continued from 1946
Series 70: 7-4558037 - Continued from 1946
1947 Buick Beginning Serial Numbers, All Series:
1-4524131, Flint Michigan
2-4530001, Southgate, California
3-4542001, Linden, New Jersey
4-4536001, Kansas City, Missouri
Popular Options, All Series:
Sonomatic Radio, Weather-Warden Heater & Defroster, Side View Mirror, EZI-Non Glare Rear View Mirror, Prismatic Inside Rear View Mirror, Vanity Visor Mirror, Spot Light, Auxillary Driving Lights, Multi-Purpose Trouble Light, Breeze-Ease Draft Deflectors, Seat Covers.
1947 Buick Paint Codes & Colors
Code Color PPG #
4701 Black 9200
4704 Verde Green 40140
4705 Sherwood Green 40275
4706 Brunswick Green Poly 40276
4707 Royal Maroon Poly 50014
4714 Sequoia Cream 80118
4715 Seine Blue Poly 10305
4717 Calvert Blue Poly 10413
4718 Regency Blue Poly 10417
4719 Catalina Gray 30458
Lehigh Gray Poly 30323
Two Tones
4711 Brunswick Green Poly Upper & Sherwood Green Poly Lower
4720 Lehigh Gray Poly Upper & Catalina Gray Lower
4721 Regency Blue Poly Upper & Catalina Gray Lower
1947 Buick Historical Data:
1947 Buick Model Year Production: 256,757, including those built for export.
Promotional Model Cars:
Metal: 4 Door Sedan
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