1975 CHEVROLET VEGA

1975 CHEVROLET VEGA

Model Designations:

Chevrolet Vega, Series 1V, 4 Cylinder

Chevrolet Vega, Body Styles:

2 Door Notchback Sedan, 4 Passenger, Body #11

Base Price: $2,786; Shipping Weight: 2,415 Pounds

Production Total: 35,133+

2 Door Hatchback Coupe, 4 Passenger, Body #77

Base Price: $2,899; Shipping Weight: 2,478 Pounds

Production Total: 112,912

2 Door Station Wagon, 4 Passenger; Body #15

Base Price: $3,016; Shipping Weight: 2,531 Pounds

Production Total; 56,133*

*Includes Vega Estate Wagon Production.

+Includes Vega LX Coupe Production.

Chevrolet Vega Estate, Body Styles:

2 Door Station Wagon, 4 Passenger; Body #15

Base Price: $3,255; Shipping Weight: 2,531 Pounds

Production Total; *

* Production Total included with Vega Wagon

Chevrolet LX, Body Styles:

2 Door Coupe '112', 4 Passenger,

Base Price: $3,119; Shipping Weight: Not Available

Production Total: +

+ Production Total included with Vega 2 Door Coupe.

Cosworth Vega:

2 Door Hatchback Coupe, 4 Passenger: Body #77

Base Price: $5,916; Shipping Weight: Not Available

Production Total: 2,061

Chevrolet Vega Panel Express:

2 Door 1/2 Ton Panel Express Wagon, 2 Passenger, Body #05

Base Price: $2,822; Shipping Weight: 2,401 Pounds

Production Total: 1,525

General Specifications:

Wheelbase:

All Styles: 97"

Overall Length:

All Styles: 176"

Tire Sizes:

All Styles: A78 X 13"

Engine Specifications, 140 Cu. In., 4 Cylinder, 78 HP:

Engine Type: In-Line 4 Cylinder, Overhead Cam

Bore & Stroke: 3.500" X 3.625"

Engine Displacement: 140 Cu. In.

Compresssion Ratio: 8.00 to 1

Taxable Horsepower: 19.6

Horsepower: 78 @ 4,200 RPM

Torque: 120 Ft. Lbs. @ 2,000 RPM

Normal Oil Pressure: 40 PSI

Carburetor: 1 Barrel

Engine Specifications, 140 Cu. In., 4 Cylinder, 87 HP:

Engine Type: In-Line 4 Cylinder, Overhead Cam

Bore & Stroke: 3.500" X 3.625"

Engine Displacement: 140 Cu. In.

Compresssion Ratio: 8.00 to 1

Taxable Horsepower: 19.6

Horsepower: 87 @ 4,400 RPM

Torque: 122 Ft. Lbs. @ 2,800 RPM

Normal Oil Pressure: 40 PSI

Carburetor: 2 Barrel

Capacities:

4 Cylinder, 140 Cu. In. Engine:

Cooling System:

With Heater: 7 Quarts

With Air Conditioning: 7.5 Quarts

Radiator Cap Pressure:

With Air Conditioning: 15 PSI

Without Air Conditioning: 15 PSI

Thrermostat Opening: 195 Degrees

Fuel Tank: 16 Gallons

Engine Oil Refill: 4 Quarts, with Filter

Transmission Oil:

3 Speed: 2.4 Pints

4 Speed: 2.4 Pints

Automatic Transmission:

Refill: 4 Quarts

Total Capacity: 10 Quarts

Rear Axle: 2.25 Pints

Tune Up Specifications, 4 Cylinder, 78 H.P. Engine:

Spark Plug Type: AC R43TSX

Spark Plug: Gap .060"

Firing Order: 1-3-4-2

Ignition Timing:

Standard Transmission: 8 Degrees BTDC on Pulley

Automatic Transmission: 10 Degrees BTDC on Pulley

Engine Idle Speed:

Standard Transmission: 700 RPM

Automatic Transmission: 550 RPM, in Drive

Tune Up Specifications, 4 Cylinder, 87 H.P. Engine:

Spark Plug Type: AC R43TSX

Spark Plug: Gap .060"

Firing Order: 1-3-4-2

Ignition Timing:

Standard Transmission: 10 Degrees BTDC on Pulley

Automatic Transmission: 12 Degrees BTDC on Pulley

Engine Idle Speed:

Standard Transmission: 700 RPM

Automatic Transmission: 600 RPM, in Drive

Tune Up Specifications, Cosworth Vega:

Spark Plug Type: AC R43LTSX

Spark Plug: Gap .060"

Firing Order: 1-3-4-2

Ignition Timing:

Standard Transmission: 12 Degrees BTDC on Pulley @ 1,600 RPM

Engine Idle Speed:

Standard Transmission: 1,600 RPM

Valve Specifications, 4 Cylinder, 1 Barrel Carburetor:

Valve Lash (Cold):

Intake: .015"

Exhaust: .030"

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height: 1.75"

Valve Spring Pressure: 186 Lbs @ 1.29 inches

Valve Stem Clearance: Intake .001"-.0027"

Exhaust .001"-.0027"

Valve Stem Diameter:

Intake: .3410"-.3417"

Exhaust: .3410"-.3417"

Valve Specifications, 4 Cylinder, 2 Barrel Carburetor:

Valve Lash (Cold):

Intake: .015"

Exhaust: .030"

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height: 1.75"

Valve Spring Pressure: 190 Lbs @ 1.31 inches

Valve Stem Clearance: Intake .001"-.0027"

Exhaust .001"-.0027"

Valve Stem Diameter:

Intake: .3410"-.3417"

Exhaust: .3410"-.3417"

Pistons, Pins, Rings, Crankshaft & Bearings Data, 4 Cylinder:

Piston Clearance: .0018"-.0028"

Piston Rings:

Ring End Gap:

Compression:

Top Ring: .015"

Lower Ring: .009"

Oil: .010"

Wrist Pin Diameter: .9272"

Rod Bearings:

Shaft Diameter: 1.999"-2.000"

Rod Bearing Clearance: .0007"-.0038"

Main Bearings:

Shaft Diameter: 2.2983"-2.2993"

Main Bearing Clearance:

#1: .0003"-.002"

Others: .0003"-.003"

Thrusk on Bearing #4

Crankshaft End Play: .002"-.007"

Engine Tightening Specifications, 140 Cu. In. Engine:

Spark Plugs: 15 Ft. Lbs.

Cylinder Head Bolts: 60 Ft. Lbs.

Intake Manifold: 30 Ft. Lbs.

Exhaust Manifold: 30 Ft. Lbs.

Cam Cover: 35 Inch Lbs.

Connecting Rod Cap Bolts: 35 Ft. Lbs.

Main Bearing Cap Bolts: 65 Ft. Lbs.

Flywheel to Crankshaft: 60 Ft. Lbs.

Vibration Damper or Pulley: Pulley to Damper Screws: 80 Ft. Lbs.

Rear Axle Specifications:

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005"-.008"

Pinion Bearing Preload:

Method: Spacer

New Bearings: 10-25 Inch Lbs.

Used Bearings: 8-12 Inch Lbs.

Differential Bearing Preload:

Method: Shims

Brake Specifications:

Brake Drum Diameter: 9.000"

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:

Model: 1100545

Rated Hot Output: 32 Amperes