1968 PONTIAC FIREBIRD

1968 PONTIAC FIREBIRD

Model Designations:

Pontiac, Firebird, Series 223 6 & 8 Cylinder

Pontiac Firebird, Body Styles:

2 Door Hardtop Coupe, 5 Passenger, Body Style #22337

Base Price: $2,781; Shipping Weight: 3,061 Pounds

Total Production: 90,152

2 Door Convertible, 5 Passenger, Body Style #22367

Base Price: $2,996; Shipping Weight: 3,346 Pounds

Total Production: 16,960

Total Firebird Production: 107,112

Model # Engine & Trim Manual Trans Auto. Trans Total

223 6 Cylinder, Standard Trim 7,528 8,441 15,969

224 8 Cylinder, Standard Trim 16,632 39,250 55,882

225 6 Cylinder, DeLuxe Trim 1,216 1,309 2,525

226 8 Cylinder, DeLuxe Trim 7,534 25,202 32,736

32,910 74,202 107,112

Chassis:

Wheelbase: 108"

Tire Size: Not Available

Engine Availability:

Engine Horsepower Model Availability

I-6 250 Cubic Inch 175 H.P. Standard

I-6 250 Cubic Inch 215 H.P. Optional

V-8 350 Cubic Inch 265 H.P. Standard on Firebird 350

V-8 350 Cubic Inch 320 H.P. Standard on Firebird High Output

V-8 400 Cubic Inch 330 H.P. Standard on Firebird 400

V-8 400 Cubic Inch 335 H.P. Optional on Firebird 400 (Ram Air)

General Engine Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Tune Up Specifications:

6 Cylinder, 250 Cubic Inch Engine, with 1 Barrel Carburetor:

Spark Plug Type: AC 44N

Spark Plug Gap: .035"

Point Gap: .016"

Dwell Angle: 31-34 Degrees

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

Ignition Timing: TDC

Engine Idle Speed:

Standard Transmission: 700 RPM; 500 RPM with A/C "Off"

Automatic Transmission: 600 RPM in Drive: 500 RPM in Drive, with A/C "Off"

Fuel Pump Pressure: 4 to 5-1/4 PSI

6 Cylinder, 250 Cubic Inch Engine, with 4 Barrel Carburetor:

Spark Plug Type: AC 44N

Spark Plug Gap: .035"

Point Gap: .016"

Dwell Angle: 31-34 Degrees

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

Ignition Timing: 5 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 800 RPM; 600 RPM with A/C "Off"

Automatic Transmission: 600 RPM in Drive; 500 RPM in Drive, with A/C "Off"

Fuel Pump Pressure: 4 to 5-1/4 PSI

8 Cylinder, 350 Cubic Inch Engines:

Spark Plug Type: AC 45S

Spark Plug: Gap .035"

Point Gap: .016"

Distributor Cam Angle: 28-32 Degrees

Firing Order: 1-8-4-3-6-5-7-2

Ignition Timing: 9 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 650 RPM; 500 RPM with A/C "Off"

Automatic Transmission: 650 RPM in Drive, 500 RPM in Drive, with A/C "Off"

Fuel Pump Pressure: 5 to 6-1/2 PSI

8 Cylinder, 400 Cubic Inch Engine Firebird:

Spark Plug Type: AC 44S

Spark Plug: Gap .035"

Point Gap: .016"

Distributor Cam Angle: 28-32 Degrees

Firing Order: 1-8-4-3-6-5-7-2

Ignition Timing: 9 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 850 RPM; 600 RPM with A/C "Off"

Automatic Transmission: 650 RPM in Drive; 500 RPM in Drive, with A/C "Off"

Fuel Pump Pressure: 5 to 6-1/2 PSI

8 Cylinder, 400 Cubic Inch Engine High Output Firebird:

Spark Plug Type: AC 44S

Spark Plug: Gap .035"

Point Gap: .016"

Distributor Cam Angle: 30 Degrees

Firing Order: 1-8-4-3-6-5-7-2

Ignition Timing: 9 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 850 RPM; 600 RPM with A/C "Off"

Automatic Transmission: 650 RPM in Drive, 500 RPM in Drive with A/C "Off"

Fuel Pump Pressure: 5 to 6-1/2 PSI

8 Cylinder, Firebird Ram Air:

Spark Plug Type: AC 44S

Spark Plug: Gap .035"

Point Gap: .016"

Distributor Cam Angle: 28-32 Degrees

Firing Order: 1-8-4-3-6-5-7-2

Ignition Timing: 9 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 1,000 RPM; 650 RPM with A/C "Off"

Automatic Transmission: 650 RPM in Drive; 500 RPM in Drive, with A/C "Off"

Fuel Pump Pressure: 5 to 6-1/2 PSI

Valve Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Pistons, Rings, Wrist Pin, Crankshaft, & Bearing Data:

See 1968 Pontiac Engines & Engine Accessories:

Engine Tightening Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Capacities:

6 Cylinder:

Cooling System:

With Heater: 12.1 Quarts

With Air Conditioning: 12.7 Quarts

Radiator Pressure Cap:

With Air Conditioning: 14-17 PSI

Without Air Conditioning: 14-17 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 18-1/2 Gallons

Engine Oil Refill: 6 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 3-1/2 Pints

Hydra-Matic Transmission:

Oil Pan Only: 2-1/2 Quarts

After Overhaul: 9-1/2 Quarts

Rear Axle: 3 Pints

* With New Oil Filter

8 Cylinder, 350 Cubic Inch Engine:

Cooling System:

With Heater: 18.6 Quarts

With Air Conditioning: 20.2 Quarts

Radiator Pressure Cap:

With Air Conditioning: 14-17 PSI

Without Air Conditioning: 14-17 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 18-1/2 Gallons

Engine Oil Refill: 6 Quarts*

Manual Transmission:

Four Speed: 3.5 Pints

Hydra-Matic Transmission:

Oil Pan Only: 2-1/2 Quarts

After Overhaul: 9-1/2 Quarts

Rear Axle: 3 Pints

* With New Oil Filter

8 Cylinder, 350 Cubic Inch High Output Engine:

Cooling System:

With Heater: 18.6 Quarts

With Air Conditioning: 20.2 Quarts

Radiator Pressure Cap:

With Air Conditioning: 14-17 PSI

Without Air Conditioning: 14-17 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 18-1/2 Gallons

Engine Oil Refill: 6 Quarts*

Manual Transmission:

Four Speed: 3.5 Pints

Hydra-Matic Transmission:

Oil Pan Only: 2-1/2 Quarts

After Overhaul: 9-1/2 Quarts

Rear Axle: 3 Pints

* With New Oil Filter

8 Cylinder, 400 Cubic Inch Engine:

Cooling System:

With Heater: 17.8 Quarts

With Air Conditioning: 19.4 Quarts

Radiator Pressure Cap:

With Air Conditioning: 14-17 PSI

Without Air Conditioning: 14-17 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 18-1/2 Gallons

Engine Oil Refill: 6 Quarts*

Manual Transmission:

Four Speed: 2.5 Pints

Hydra-Matic Transmission:

Oil Pan Only: 3-3/4 Quarts

After Overhaul: 9-1/2 Quarts

Rear Axle: 3 Pints

* With New Oil Filter

Delco-Remy Distributor Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Delco-Remy Alternator & Regulator Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Delco-Remy Starting Motor Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Rear Axle Specifications:

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005"-.009"

Pinion Bearing Preload:

Method: Nut

Adjustment:

New Bearings: 20-30 Inch Lbs

Used Bearings: 14-20 Inch Lbs.

Differential Bearing Preload:

Method: Shims

Adjustment: Slip fit plus .008" Tight

Brake Specifications:

Brake Drum Diameter: 9-1/2"

Wheel Cylinder Bore:

Disc Brakes: 2-1/16"

Front: 1-1/8"

Rear: 7/8"

Master Cylinder Bore:

Disc Brakes: 1-1/8"

Drum Brakes: 1"

Power Brakes: 1"

Wheel Alignment Specifications:

All Models:

Caster: +1/2 Degrees

Camber:

Left: +1/4 Degrees

Right: +1/4 Degrees

Toe In: 1/8 to 1/4"

Toe-Out on Turns:

Inner Wheel: 20 Degrees

Carburetor Specifications:

See 1968 Pontiac Engines & Engine Accessories:

Popular Options:

Air Conditioning; Heater & Defroster; AM Radio; AM-FM Push Button Radio; Stereo Tape Player; Rear Seat Speaker; Electric Antenna; Power Steering; Power Brakes; Electric Clock; Tinted Windshield; Padded Dash; Remote Control Side Mirror; LeMans Console Shift; Bucket Seats; Reclining Passenger Side Bucket Seat; Head Rests; Tilt Steering Wheel; Custom Sports Steering Wheel; Tachometer; Rally Gauge Cluster; Two Speed Wipers & Washer; Custom Wheel Discs; Wire Wheel Discs; Rally Wheels; Back Up Lights; Bumper Guards; Cordova Top; Handling & Ride Package; Safe-T-Track; Various Trim Options; Various Engine & Transmission Options, and much more.

1968 Pontiac Historical Data:

Introduction date for the 1968 Pontiac line was on September 21, 1967

Total 1968 Pontiac Production was 910,977, including 107,112 Firebirds.

1968 Pontiac Colors & Codes:

Code Color

A Starlight Black

C Cameo Ivory

D Alpine Blue

E Agena Blue

F Nordic Blue

G April Gold

I Autumn Bronze

K Meridian Turquoise

L Aleutian Blue

N Flambeau Burgundy

P Spring Mist Green

Q Verdoro Green

R Solar Red

T Primavera Beige

V Nightshade Green

Y Mayfair Maize

Promotional Model Cars Available:

Plastic: Bonneville 2 Door Hardtop, Bonneville Convertible, Tempest GTO 2 Door Hardtop, Tempest GTO Convertible, Firebird Convertible & Firebird 2 Door Hardtop.