1975 BUICK SKYHAWK

1975 BUICK SKYHAWK

Model Designations:

Buick Skyhawk, 6 Cylinder

Buick Skyhawk, Body Styles:

2 Door 'S' Hatchback Coupe, 4 Passenger, Body #HT07

Base Price: $3,860; Shipping Weight: 2,851 Pounds

Production Total: N/A

2 Door Hatchback Coupe, 4 Passenger, Body #HS07

Base Price: $4,173; Shipping Weight: 2,891 Pounds

Production Total: N/A

All Skyhawks for 1975 were produced in Canada. US. model year sales were 29,448.

General Specifications:

Wheelbase:

All Styles: 97"

Tire Sizes:

All Styles: BR78 X 13"

Engine Specifications, 231 Cu. In., 6 Cylinder, 110 HP:

Engine Type: Overhead Valve V-Type 6 Cylinder

Engine Bore & Stroke: 3.80" X 3.40"

Engine Displacement: 231 Cu. In.

Compression Ratio: 8.0:1

Taxable Horsepower: 34.66

Horsepower: 110 @ 4,000 RPM

Torque: 175 Ft. Lbs. @ 2,000 RPM

Normal Oil Pressure: 37 PSI

Carburetor: 2 Barrel

Tune Up Specifications:

V-6, 231 Cubic Inch Engine, 110 H.P.

Spark Plug Type: AC R44SX

Spark Plug: Gap .060"

Firing Order: 1-6-5-4-3-2

Ignition Timing:

Standard Transmission: 12 Degrees BTDC

Automatic Transmission: 12 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 600 RPM, 800 RPM with A/C Solenoid Energized

Automatic Transmission: 500 RPM in Drive; 650 RPM, in Drive w/AC Solenoid Energized

Fuel Pump Pressure: 3 to 4-1/2 PSI

Valve Data, V-Type 6 Cylinder 231 Cu. In. Engine:

Valve Lash: Hydraulic

Valve Seat Angle:

Seat: 45 Degrees

Face: 45 Degrees

Valve Spring Height, Installed: 1.727"

Minimum Valve Spring Pressure: 168 Pounds @ 1.327"

Valve Stem Clearance:

Intake: .0015"-.0032"

Exhaust: .0015"-.0032"

Valve Stem Diameter:

Intake: Tapered .3405-.3412"

Exhaust: Tapered .3405-.3412"

Piston, Pins, Rings, Crankshaft, & Bearings, 231 Cu. In. V-6 Engine:

Piston Clearance: .0008"-.0020"

Ring End Gap:

Compression: .010"

Oil Control: .015"

Wrist Pin Diameter: .9393"

Rod Bearings:

Shaft Diameter: 1.991"-2.000""

Rod Bearing Clearance: .0005"-.0026"

Main Bearings:

Shaft Diameter: 2.4995"

Main Bearing Clearance: .0004"-.0015"

Thrust on Bearing #2

Shaft End Play: .004"-.008"

Engine Tightening Specifications, 231 Cu. In. V-6 Engines:

Spark Plugs: 20 Ft. Lbs.

Cylinder Head Bolts: 75 Ft. Lbs.

Intake Manifold: 45 Ft. Lbs.

Exhaust Manifold: 25 Ft. Lbs.

Rocker Arm Shaft Bracket: 30 Ft. Lbs.

Rocker Arm Cover: 5 Ft. Lbs.

Connecting Rod Cap Bolts: 40 Ft. Lbs.

Main Bearing Cap Bolts: 115 Ft. Lbs.

Flywheel to Crankshaft: 55 Ft. Lbs.

Vibration Damper or Pulley: 150 Ft. Lbs.

Capacities:

6 Cylinder, 231 Cu. In. Engine:

Cooling System:

With Heater: 13-1/4 Quarts

With Air Conditioning: 13-3/4 Quarts

Radiator Cap Pressure: 15 PSI

Thrermostat Opening: 190 Degrees

Fuel Tank: 18-1/2 Gallons

Engine Oil Refill: 4 Quarts, with Filter

Transmission Oil:

3 Speed: 2.4 Pints

4 Speed: 3.5 Pints

Automatic Transmission:

Refill: 3 Quarts

Total Capacity: 10 Quarts

Rear Axle: 2-1/4 Pints

Rear Axle Specifications:

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .006"-.008"

Pinion Bearing Preload:

Method: Spacer

New Bearings: 10-25 Inch Lbs.

Used Bearings: 8-12 Inch Lbs.

Differential Bearing Preload:

Method: Shims

New Bearings: 35-40 Inch Pounds

Used Bearings: 20-25 Inch Pounds

Brake Specifications:

Brake Drum Diameter: 9.00"

Wheel Cylinder Bore:

Front Disc Brakes: 1-7/8"

Rear: 3/4"

Master Cylinder Bore:

Disc Brakes: 3/4"

Power Brakes: 3/4"

Wheel Alignment Specifications:

Caster: -3/4 Degree

Camber:

Left: +1/4 Degrees

Right: +1/4 Degrees

Toe In: 0"-1/8"

Alternator Specifications:

Note: Not all alternators shown my be available on the Skyhawk

Model: 1100545

Rated Hot Output: 32 Amperes