1968 MERCURY COMET

1968 MERCURY COMET

MONTEGO & CYCLONE

Model Designations:

Mercury Comet, 6 & 8 Cylinder

Mercury Montego, 6 & 8 Cylinder

Mercury Montego MX, 6 & 8 Cylinder

Mercury Cyclone, 8 Cylinder

Mercury Comet, 6 & 8 Cylinder, Body Styles:

2 Door Hardtop Coupe, 6 Passenger, Body # 01

Factory Price: $2,477; Shipping Weight: 3,078 Pounds

Production Total: 14,251

Mercury Montego, 6 & 8 Cylinder, Body Styles:

4 Door Sedan, 6 Passenger, Body # 06

Factory Price: $2,504; Shipping Weight: 2,982 Pounds

Production Total: 18,492

2 Door Hardtop Coupe, 6 Passenger, Body # 07

Factory Price: $2,552; Shipping Weight: 3,057 Pounds

Production Total: 15,002

Mercury Montego MX, 6 & 8 Cylinder, Body Styles:

4 Door Station Wagon, 6 Passenger, Body # 08

Factory Price: $2,876; Shipping Weight: 3,379 Pounds

Production Total: 9,328

4 Door Sedan, 6 Passenger, Body # 10

Factory Price: $2,657; Shipping Weight: 3,007 Pounds

Production Total: 15,264

2 Door Hardtop Coupe, 6 Passenger, Body # 11

Factory Price: $2,675; Shipping Weight: 3,081 Pounds

Production Total: 25,827

2 Door Convertible Coupe, 6 Passenger, Body # 12

Factory Price: $2,934; Shipping Weight: 3,293 Pounds

Production Total: 3,248

Note: 6 & 8 Cylinder Production Figures are combined for all series.

Mercury Comet Cyclone, 8 Cylinder, Body Styles:

2 Door Hardtop Coupe, 6 Passenger, Body # 17

Factory Price: $2,768; Shipping Weight: 3,208 Pounds

Production Total: 1,368

2 Door Fastback Coupe, 6 Passenger, Body # 15

Factory Price: $2,768; Shipping Weight: 3,254 Pounds

Production Total: 12,260

Chassis:

Wheelbase:

Station Wagon: 113"

Passenger Cars: 116"

Tire Sizes: 7.75 X 14"

Engine Availability by Model:

I-6 200 Cubic Inches 115 H.P. Standard Engine, all models except Cyclone

V-8 289 Cubic Inches 195 H.P. Optional on All Models.

V-8 302 Cubic Inches 210 H.P. Standard on Cyclone. Optional on Montego.

V-8 302 Cubic Inches 230 H.P. Optional on Montego.

V-8 390 Cubic Inches 265 H.P. Optional on Montego & Cyclone.

V-8 390 Cubic Inches 325 H.P. Standard on Cyclone & Montego, except wagons.

V-8 427 Cubic Inches 390 H.P. Optional on Cyclone & Montego hardtops.

V-8 428 Cubic Inches 335 H.P. Optional on Cyclone & Montego

General Engine Specifications:

6 Cylinder, 115 H.P. Engine:

Engine Type: Overhead Valve, Inline 6

Bore & Stroke: 3.680" x 3.12"

Engine Displacement: 200 Cu. In.

Compression Ratio: 8.80:1

Taxable Horsepower: 32.50

Horsepower: 115 @ 3,800 RPM

Torque: 190 Ft. Lbs @ 2,200 RPM

Normal Oil Pressure: 35-55 PSI

Carburetor: 1 Barrel

8 Cylinder, 289 Cubic Inch, 195 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 2.87"

Engine Displacement: 289 Cu. In.

Compression Ratio: 8.70:1

Taxable Horsepower: 51.20

Horsepower: 195 @ 4,400 RPM

Torque: 280 Ft. Lbs @ 2,400 RPM

Normal Oil Pressure: 35-55 PSI

Carburetor: 2 Barrel

8 Cylinder, 302 Cubic Inch, 210 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 3.00"

Engine Displacement: 302 Cu. In.

Compression Ratio: 9.00:1

Taxable Horsepower: 51.20

Horsepower: 210 @ 4,600 RPM

Torque: 295 Ft. Lbs @ 2,600 RPM

Normal Oil Pressure: 35-55 PSI

Carburetor: 2 Barrel

8 Cylinder, 302 Cubic Inch, 230 H.P. Engine:

Engine Type: Overhead Valve, V-Type 8 Cylinder

Bore & Stroke: 4.00" x 3.00"

Engine Displacement: 302 Cu. In.

Compression Ratio: 10.00:1

Taxable Horsepower: 51.20

Horsepower: 230 @ 4,800 RPM

Torque: 310 Ft. Lbs @ 2,800 RPM

Normal Oil Pressure: 35-55 PSI

Carburetor: 4 Barrel

V-8 Engine, 390 Cubic Inches, 265 H.P.:

Engine Type: Overhead Valve V-8

Bore & Stroke: 4.0468" x 3.781"

Engine Displacement: 390 Cu. In.

Compresssion Ratio: 9.50 to 1

Taxable Horsepower: 52.96

Horsepower: 265 @ 4,400 RPM

Torque: 390 Ft. Lbs @ 2,600 RPM

Normal Oil Pressure: 35-55 PSI

Carburetor: 2 Barrel

V-8 Engine, 390 Cubic Inches, 325 H.P.:

Engine Type: Overhead Valve V-8

Bore & Stroke: 4.0468" x 3.781"

Engine Displacement: 390 Cu. In.

Compresssion Ratio: 10.50 to 1

Taxable Horsepower: 52.96

Horsepower: 325 @ 4,800 RPM

Torque: 427 Ft. Lbs @ 3,200 RPM

Normal Oil Pressure: 35-55 PSI

Carburetor: 4 Barrel

V-8 Engine, 427 Cubic Inches, 390 H.P.:

Engine Type: Overhead Valve, Single Overhead Cam, V-8

Bore & Stroke: 4.238" x 3.784"

Engine Displacement: 427 Cu. In.

Compresssion Ratio: 10.90 to 1

Taxable Horsepower: 57.30

Horsepower: 390 @ 5,600 RPM

Torque: 460 Ft. Lbs @ 3,200 RPM

Normal Oil Pressure: 40-55 PSI

Carburetor: 4 Barrel

V-8 Engine, 428 Cubic Inches, 335 H.P.:

Engine Type: Overhead Valve, V-8

Bore & Stroke: 4.130" x 3.980"

Engine Displacement: 428 Cu. In.

Compresssion Ratio: 10.60 to 1

Taxable Horsepower: 54.59

Horsepower: 335 @ 5,200 RPM

Torque: 440 Ft. Lbs @ 3,400 RPM

Normal Oil Pressure: 40-55 PSI

Carburetor: 4 Barrel

Tune Up Specifications - All Series:

6 Cylinder 200 Cubic Inch Engine:

Spark Plug Type: Autolite BF-82

Spark Plug: Gap .034"

Point Gap: .027"

Distributor Cam Angle: 37-42 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 700 RPM, with A/C "On"

Automatic Transmission: 550 RPM in Drive, with A/C "On"

Fuel Pump Pressure: 4 to 6 PSI

8 Cylinder 289 Cubic Inch Engine, with 2 Barrel Carburetor:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .021"

Distributor Cam Angle: 24-29 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 625 RPM, with A/C "On"

Automatic Transmission: 550 RPM in Drive, with A/C "On"

Fuel Pump Pressure: 4 to 6 PSI

8 Cylinder 302 Cubic Inch Engine, with 2 Barrel Carburetor:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .021"

Distributor Cam Angle: 30-33 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 625 RPM, with A/C "On"

Automatic Transmission: 550 RPM in Drive, with A/C "On"

Fuel Pump Pressure: 4 to 6 PSI

8 Cylinder 302 Cubic Inch Engine, with 4 Barrel Carburetor & Thermactor Emission System:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .021"

Distributor Cam Angle: 30-33 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 625 RPM, with A/C "On"

Fuel Pump Pressure: 4 to 6 PSI

8 Cylinder 302 Cubic Inch Engine, with 4 Barrel Carburetor with IMO System:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 26-31 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 550 RPM in Drive, with A/C "On"

Fuel Pump Pressure: 4 to 6 PSI

8 Cylinder 390 Cubic Inch Engine, with 2 Barrel Carburetor with TEEC:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .021"

Distributor Cam Angle: 30-33 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 625 RPM, with A/C "On"

Fuel Pump Pressure: 4-1/2 to 6-1/2 PSI

8 Cylinder 390 Cubic Inch Engine, with 2 Barrel Carburetor, without TEEC:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 26-31 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 550 RPM in Drive, with A/C "On"

Fuel Pump Pressure: 4-1/2 to 6-1/2 PSI

8 Cylinder, 390 Cubic Inch Engines, with 4 Barrel Carburetor, with TEEC:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .021"

Distributor Cam Angle: 30-33 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 625 RPM, with A/C "On"

Fuel Pump Pressure: 4-1/2 to 6-1/2 PSI

8 Cylinder, 390 Cubic Inch Engines, with 4 Barrel Carubretor, without TEEC:

Spark Plug Type: Autolite BF-42

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 26-31 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 550 RPM in Drive, with A/C "On"

Fuel Pump Pressure: 4-1/2 to 6-1/2 PSI

8 Cylinder, 427 Cubic Inch Engine:

Spark Plug Type: Autolite BF-32

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 26-31 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

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

Fuel Pump Pressure: 4-1/2 to 6-1/2 PSI

8 Cylinder, 428 Cubic Inch Engine:

Spark Plug Type: Autolite BF-32

Spark Plug: Gap .034"

Point Gap: .017"

Distributor Cam Angle: 26-31 Degrees

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

Ignition Timing: 6 Degrees BTDC

Engine Idle Speed:

Standard Transmission: 700 RPM, with A/C "On"

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

Fuel Pump Pressure: 5 PSI

Valve Specifications:

6 Cylinder Engines, 200 Cubic Inch:

Valve Lash:

Intake: .066"-.166"

Exhaust: .066"-.166"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-9/16"

Valve Spring Pressure: 150 Lbs @ 1.22"

Valve Stem Clearance:

Intake .0008"-.0025"

Exhaust .001"-.0027"

Valve Stem Diameter:

Intake: .3100"-.3107"

Exhaust: .3098"-.3105"

8 Cylinder 289 & 302 Cubic Inch Engines:

Valve Lash:

Intake: 3/4 Turns

Exhaust: 3/4 Turns

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-5/8"

Valve Spring Pressure: 180 Lbs @ 1.23"

Valve Stem Clearance:

Intake .001"-.0027"

Exhaust .001"-.0032"

Valve Stem Diameter:

Intake: .3416"-.3423"

Exhaust: .3411"-.3418"

8 Cylinder 390 Cubic Inch Engine:

Valve Lash:

Intake: .100"-.200"

Exhaust: .100"-.200"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-7/8"

Valve Spring Pressure: 220 Lbs @ 1.38"

Valve Stem Clearance:

Intake .001"-.0024"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3711"-.3718"

Exhaust: .3706"-.3713"

8 Cylinder 390 Cubic Inch GT Engine:

Valve Lash:

Intake: .100"-.200"

Exhaust: .100"-.200"

Valve Angles:

Seat: 45 Degrees

Face: 44 Degrees

Valve Spring Height, Installed: 1-13/16"

Valve Spring Pressure: 270 Lbs @ 1.32"

Valve Stem Clearance:

Intake .001"-.0024"

Exhaust .0015"-.0032"

Valve Stem Diameter:

Intake: .3711"-.3718"

Exhaust: .3706"-.3713"

8 Cylinder Engine, 427 Cu. In.:

Valve Lash:

Intake: .100"-.200"

Exhaust: .100"-.200"

Valve Angles:

Seat:

Intake: 30 Degrees

Exhaust: 45 Degrees

Face:

Intake: 30 Degrees

Exhaust: 45 Degrees

Valve Spring Height, Installed: 1-13/16"

Valve Spring Pressure: 270 Lbs @ 1.32 inches

Valve Stem Clearance:

Intake .001"-.0024";

Exhaust .002"-.0034"

Valve Stem Diameter:

Intake: .3711"-.3718"

Exhaust: .3701"-.3708"

8 Cylinder Engine, 428 Cu. In.:

Valve Lash:

Intake: .100"-.200"

Exhaust: .100"-.200"

Valve Angles:

Seat: 45 Degrees

Face:: 44 Degrees

Valve Spring Height, Installed: 1-13/16"

Valve Spring Pressure: 90 Lbs @ 1.82 inches

Valve Stem Clearance:

Intake .001"-.0024";

Exhaust .001"-.0032"

Valve Stem Diameter:

Intake: .3711"-.3718"

Exhaust: .3706"-.3713"

Piston, Rings, Pins, Crankshaft & Bearing Data:

6 Cylinder Engines:

Piston Clearance: .0014"-.0020"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.1232"-2.1240"

Bearing Clearance: .0008"-.0024"

Main Bearings:

Shaft Diameter: 2.2482"-2.2490"

Bearing Clearance: .0005"-.0022"

Thrust on Bearing: #5

Crankshaft End Play: .004"-.008"

8 Cylinder, 289 Cubic Inch Standard Engine:

Piston Clearance: .0018"-.0026"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .912"

Rod Bearings:

Shaft Diameter: 2.1228"-2.1236"

Bearing Clearance: .0008"-.0026"

Main Bearings:

Shaft Diameter: 2.2482"-2.2490"

Bearing Clearance: .0005"-.0025"

Thrust on Bearing #3

Crankshaft End Play: .004"-.008"

8 Cylinder, 390 Cubic Inch Engine:

Piston Clearance: .0015"-.0023"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .975"

Rod Bearings:

Shaft Diameter: 2.4380"-2.4388"

Bearing Clearance: .0008"-.0026"

Main Bearings:

Shaft Diameter: 2.7484"-2.7492"

Bearing Clearance: .0005"-.0025"

Thrust on Bearing #3

Crankshaft End Play: .004"-.010"

8 Cylinder Engines, 427 Cubic Inches:

Piston Clearance: .0042"-.0066"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .975"

Rod Bearings:

Shaft Diameter: 2.4380"-2.4388"

Bearing Clearance: .0013"-.0032"

Main Bearings:

Shaft Diameter: 2.7484"-2.7492"

Bearing Clearance: .0007"-.0031"

Thrust on #3 Bearing

Crankshaft End Play: .004"-.010"

8 Cylinder Engine, 428 Cubic Inches:

Piston Clearance: .0015"-.0023"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .975"

Rod Bearings:

Shaft Diameter: 2.4380"-2.4388"

Bearing Clearance: .0008"-.0026"

Main Bearings:

Shaft Diameter: 2.7484"-2.7492"

Bearing Clearance: .0005"-.0015"

Thrust on #3 Bearing

Crankshaft End Play: .004"-.010"

Engine Tightening Specifications:

6 Cylinder Engine:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 70-75 Ft. Lbs.

Exhaust Manifold: 13-18 Ft. Lbs.

Rocker Arm Shaft Bracket: 30-35 Ft. Lbs.

Rocker Arm Cover: 3-5 Ft. Lbs.

Connecting Rod Cap Bolts: 19-24 Ft. Lbs.

Main Bearing Cap Bolts: 60-70 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 85-100 Ft. Lbs.

8 Cylinder 289 & 302 Cubic Inch Engines:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 65-72 Ft. Lbs.

Intake Manifold: 20-22 Ft. Lbs.

Exhaust Manifold: 15-20 Ft. Lbs.

Rocker Arm Cover: 3-5 Ft. Lbs.

Connecting Rod Cap Bolts: 19-24 Ft. Lbs.

Main Bearing Cap Bolts: 60-70 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

8 Cylinder 390 Cubic Inch Engines:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 80-90 Ft. Lbs.

Intake Manifold: 32-35 Ft. Lbs.

Exhaust Manifold: 15-20 Ft. Lbs.

Rocker Arm Cover: 4-7 Ft. Lbs

Rocker Arm Shaft Bracket: 40-45 Ft. Lbs.

Connecting Rod Cap Bolts: 40-45 Ft. Lbs.

Main Bearing Cap Bolts: 95-105 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

8 Cylinder, 427 Cubic Inch Engine:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 100-110 Ft. Lbs.

Intake Manifold: 25-28 Ft. Lbs.

Exhaust Manifold: 12-18 Ft. Lbs.

Rocker Arm Shaft Bracket: 40-45 Ft. Lbs.

Rocker Arm Cover: 4-7 Ft. Lbs.

Connecting Rod Cap Bolts: 53-58 Ft. Lbs.

Main Bearing Cap Bolts: 95-105 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

8 Cylinder, 428 Cubic Inch Engine:

Spark Plugs: 15-20 Ft. Lbs.

Cylinder Head Bolts: 80-90 Ft. Lbs.

Intake Manifold: 32-35 Ft. Lbs.

Exhaust Manifold: 12-18 Ft. Lbs.

Rocker Arm Shaft Bracket: 45-50 Ft. Lbs.

Rocker Arm Cover: 4-7 Ft. Lbs.

Connecting Rod Cap Bolts: 40-45 Ft. Lbs.

Main Bearing Cap Bolts: 95-105 Ft. Lbs.

Flywheel to Crankshaft: 75-85 Ft. Lbs.

Vibration Damper or Pulley: 70-90 Ft. Lbs.

Capacities-All Series:

With 6 Cylinder Engine:

Cooling System:

Without Heater: 8-1/2 Quarts

With Heater: 9-1/2 Quarts

With Air Conditioning: 9-1/2 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 4-1/2 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 8 Quarts

Rear Axle: 2-1/2 Pints

* With New Oil Filter

With 8 Cylinder, 289 Cubic Inch Engine:

Cooling System:

Without Heater: 14 Quarts

With Heater: 15 Quarts

With Air Conditioning: 15 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 5 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 9 Quarts

Rear Axle: 4 Pints

* With New Oil Filter

With 8 Cylinder, 302 Cubic Inch Engine:

Cooling System:

Without Heater: 14 Quarts

With Heater: 15 Quarts

With Air Conditioning: 15 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 5 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 9 Quarts

Rear Axle: 4 Pints

* With New Oil Filter

With 8 Cylinder, 390 Cubic Inch Engines:

Cooling System:

Without Heater: 19-1/2 Quarts

With Heater: 20-1/2 Quarts

With Air Conditioning: 20-1/2 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 5 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 12-3/4 Quarts

Rear Axle: 5 Pints

* With New Oil Filter

With 8 Cylinder, 427 Cubic Inch Engines:

Cooling System:

Without Heater: 19-1/2 Quarts

With Heater: 20-1/2 Quarts

With Air Conditioning: 20-1/2 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 6 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 12-3/4 Quarts

Rear Axle: 5 Pints

* With New Oil Filter

With 8 Cylinder, 428 Cubic Inch Engines:

Cooling System:

Without Heater: 19-1/2 Quarts

With Heater: 20-1/2 Quarts

With Air Conditioning: 20-1/2 Quarts

Radiator Cap Pressure:

With Air Conditioning: 12-15 PSI

Without Air Conditioning: 12-15 PSI

Thermostat Opening: 190 Degrees

Fuel Tank: 20 Gallons

Engine Oil Refill: 5 Quarts*

Manual Transmission:

Three Speed: 3-1/2 Pints

Four Speed: 4 Pints

Automatic Transmission: 12-3/4 Quarts

Rear Axle: 5 Pints

* With New Oil Filter

Starting Motor Specifications:

6 Cylinder Engines:

Part #C7ZF-11001-A

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts, @ 8,500 RPM

Torque Test: 460 Amperes, 6.0 Volts, @ 9 Ft. Lbs.

Part #C7OF-11001-A

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts, @ 9,500 RPM

Torque Test: 670 Amperes, 5.0 Volts, @ 15.5 Ft. Lbs.

Part #C7DF-11001-A

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts, @ 8,500 RPM

Torque Test: 460 Amperes, 6.0 Volts, @ 9 Ft. Lbs.

289 & 302 Cubic Inch 8 Cylinder Engines:

Part #C7AF-11001-B

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts @ 9,500 RPM

Torque Test: 670 Amperes, 5.0 Volts, @ 15.5 Ft. Lbs.

Part #C7AF-11001-D

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts @ 9,500 RPM

Torque Test: 670 Amperes, 5.0 Volts, @ 15.5 Ft. Lbs.

Part #C7AF-11001-F

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts @ 9,500 RPM

Torque Test: 670 Amperes, 5.0 Volts, @ 15.5 Ft. Lbs.

390 & 427 Cubic Inch 8 Cylinder Engines:

Part #C7AF-11001-C

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts @ 9,500 RPM

Torque Test: 670 Amperes, 5.0 Volts, @ 15.5 Ft. Lbs.

Part #C7AF-11001-E

Brush Spring Tension: 40 Ounces

No Load Test: 70 Amperes, 12 Volts @ 11,000 RPM

Torque Test: 700 Amperes, 4.0 Volts, @ 15.5 Ft. Lbs.

Ford Alternator Specifications:

Part #C6AF-10300-A

Current Rating: 42 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.8 to 3.3 Amperes @ 12 Volts

Voltage Regulator: (Autolite)

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.3 to 4.2 Volts

Part #C6AF-10300-B

Current Rating: 42 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.8 to 3.3 Amperes @ 12 Volts

Voltage Regulator: (Autolite)

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.3 to 4.2 Volts

Part #C6AF-10300-G

Current Rating: 55 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.8 to 3.3 Amperes @ 12 Volts

Voltage Regulator: (Autolite)

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.3 to 4.2 Volts

Part #C6DF-10300-A

Current Rating: 38 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.4 Amperes @ 12 Volts

Voltage Regulator: (Autolite)

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.3 to 4.2 Volts

Part #C6TF-10300-F

Current Rating: 55 Amperes @ 15 Volts

Field Current @ 75 Degrees: 2.8 to 3.3 Amperes @ 12 Volts

Voltage Regulator: (Autolite)

Voltage @ 75 Degrees: 13.5-15.3 Volts

Field Relay:

Closing Voltage @ 75 Degrees: 2.3 to 4.2 Volts

Distributor Specifications:

6 Cylinder Engine, 200 Cubic Inch, with Standard Transmission:

Part #C8DF-C

Breaker Point Gap: .027"

Cam Angle: 35-40 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 14 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

6 Cylinder Engine, 200 Cubic Inch, with Automatic Transmission:

Part #C8DF-D

Breaker Point Gap: .027"

Cam Angle: 35-40 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 289 Cubic Inch, with Standard Transmission:

Part #C8TF-F

Breaker Point Gap: .021"

Cam Angle: 24-29 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11-1/2 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 289 Cubic Inch, with Automatic Transmission:

Part #C8OF-C

Breaker Point Gap: .021"

Cam Angle: 24-29 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11-1/2 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 302 Cubic Inch, with 4 Barrel Carburetor & Standard Transmission:

Part #C8ZF-A

Breaker Point Gap: .021"

Cam Angle: 24-29 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 10-1/2 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 302 Cubic Inch, with 4 Barrel Carburetor & Automatic Transmission:

Part #C8ZF-D

Breaker Point Gap: .017"

Cam Angle: 26-31 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 9 Degrees @ 25" Vacuum

8 Cylinder Engine, 302 Cubic Inch, with 2 Barrel Carburetor & Standard Transmission:

Part #C8ZF-E

Breaker Point Gap: .021"

Cam Angle: 24-29 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11 Degrees @ 25" Vacuum

8 Cylinder Engine, 302 Cubic Inch, with 2 Barrel Carburetor & Automatic Transmission:

Part #C8ZF-C

Breaker Point Gap: .021"

Cam Angle: 24-29 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11-1/2 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 390 Cubic Inch, with 2 Barrel Carburetor, Premium Fuel:

Part #C8WF-B

Breaker Point Gap: .017"

Cam Angle: 26-31 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 12-1/2 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 390 Cubic Inch, with 2 Barrel Carburetor, & Standard Transmission:

Part #C8AF-M

Breaker Point Gap: .021"

Cam Angle: 24-29 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 12-1/2 Degrees @ 25" Vacuum

Maximum Retard: 6 Degrees @ 20" Vacuum

8 Cylinder Engine, 390 Cubic Inch, with 2 Barrel Carburetor, & Automatic Transmission:

Part #C8AF-AA

Breaker Point Gap: .017"

Cam Angle: 26-31 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 11 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11-1/2 Degrees @ 25" Vacuum

8 Cylinder Engine, 390 Cubic Inch, with 2 Barrel Carburetor:

Part #C8OF-D

Breaker Point Gap: .017"

Cam Angle: 26-31 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 350 RPM

Full Advance: 16 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 9-1/2 Degrees @ 25" Vacuum

Maximum Retard: 3-1/2 Degrees @ 20" Vacuum

8 Cylinder Engine, 427 Cubic Inch:

Part #C7OF-F

Breaker Point Gap: .017"

Cam Angle: 26-31 Degrees

Breaker Arm Spring Tension: 17 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degree @ 300 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 11 Degrees @ 25" Vacuum

8 Cylinder, 428 Cubic Inch Engine:

Part #C8AF-Y

Breaker Point Gap: .017"

Cam Angle: 26-31 Degrees

Breaker Arm Spring Tension: 19 to 21 Ounces

Centrifugal Advance:

Advance Starts: 1/2 Degrees @ 350 RPM

Full Advance: 14 Degrees @ 2,000 RPM

Vacuum Advance Data:

Advance Starts @ 5" Vacuum

Full Advance: 12-1/2 Degrees @ 25" Vacuum

Brake Specifications, Passenger Cars, All Series

6 Cylinder Plus 289 & 302 Cubic Inch 8 Cylinder Passenger Cars:

Brake Drum Diameter: 10.00"

Wheel Cylinder Bore:

Front Disc: 2.375"

Front Drum: 1.125"

Rear: .906"

Master Cylinder Bore:

Disc Brakes: .9375

Drum Brakes: 1"

Power Brakes: .9375

8 Cylinder, with 390 & 427 Cubic Inch Engine Passenger Cars:

Brake Drum Diameter: 10.00"

Wheel Cylinder Bore:

Front Disc: 2.375"

Front Drum: 1.094"

Rear: .875"

Master Cylinder Bore:

Disc Brakes: .9375

Drum Brakes: 1"

Power Brakes: .9375

8 Cylinder Convertibles:

Brake Drum Diameter: 10.00"

Wheel Cylinder Bore:

Front Disc: 2.375"

Front Drum: 1.094"

Rear: .906"

Master Cylinder Bore:

Disc Brakes: .9375

Drum Brakes: 1"

Power Brakes: .9375

Station Wagons:

Brake Drum Diameter: 10.00"

Wheel Cylinder Bore:

Front Disc: 2.375"

Front Drum: 1.094"

Rear: .938"

Master Cylinder Bore:

Disc Brakes: .9375

Drum Brakes: 1"

Power Brakes: .9375

Rear Axle, All Models:

Carrier Type: Integral

Ring Gear & Pinion Backlash: .008"-.012"

Nominal Pinion Locating Shim: .017"

Method: Shims

Pinion Bearing Preload:

With New Bearings: 17-27 Inch Pounds

With Used Bearings: 6-12 Inch Pounds

Differential Bearing Preload:

With New Bearings: .008"-.012"

With Used Bearings: .003"-.005"

Pinion Nut Torque: 175 Ft. Lbs.

Carrier Type: Removable

Ring Gear & Pinion Backlash: .008"-.012"

Nominal Pinion Locating Shim:

With 7-3/4" or 8" Ring Gear: .022"

With 8-3/4" or 9" Ring Gear: .015"

Method: Shims

Pinion Bearing Preload:

With New Bearings:

With 7-3/4" or 8" Ring Gear: 17-32 Inch Pounds

With 8-3/4" or 9" Ring Gear: 22-32 Inch Pounds

With Used Bearings: 8-14 Inch Pounds

Differential Bearing Preload:

With New Bearings: .008"-.012"

With Used Bearings: .003"-.008"

Pinion Nut Torque: 175 Ft. Lbs.

Wheel Alignment Specifications:

All Models:

Caster: -1/2 Degrees

Camber:

Left: + 1/4 Degree

Right: + 1/4 Degree

Toe-In: 1/4"

Toe-Out on Turns:

Outer Wheel:

Manual Steering: 18-1/8 Degrees

Power Steering: 17-3/4 Degrees

Inner Wheel: 20 Degrees

Mercury Comet, Cyclone & Montego Carburetor Specifications:

Note: See 1968 Ford Motor Company Carburetors Data Base

Popular Options:

AM Push Button Radio & Antenna; AM-FM Radio & Antenna; AM-FM Stereo Radio; Stereo-Sonic Tape System; Fresh Air Heater & Defroster; Automatic Transmission; Power Windows; Tinted Glass; Air Conditioning; Heavy Duty Battery; Two Tone Paint; White Wall Tires; Deluxe Wheel Covers; Wire Wheel Covers; Windshield Washer; Back Up Lamps; Power Trunk Deck Release; Remote Control Outside Mirror; Power Steering; Power Brakes; Disc Brakes; Power Windows; Power Seat; Electric Tailgate Window for Station Wagons; Luggage Rack for Station Wagons; Tachometer; Rally Pac; Oxford Roof on 2 Door Hardtops; Courtesy Light Group; Emergency Flasher; Engine & Transmission Options; and Much More.

1968 Mercury Historical Data:

Introduction date of the 1968 Mercury line was on September 22, 1967.

Total Mercury Production for the1968 model year was 357,208 including 117,482 Comets, Cyclones, & Montegos, broken down as follows:

Comet: 14,251

Montego: 33,494

Montego MX: 53,667

Cyclone: 13,628

1968 Mercury Colors &Codes:

A Onyx

B Black Cherry

D Nordic Blue

F Madras Blue

I Lime Frost

M Polar White

N Diamond Blue

O Sea Foam Green

P Pewter Beige

Q Glacier Blue

R Augusta Green

T Cardinal Red

U Caribbean Blue

V Cinnamon Frost

W Saxony

X Wellington Blue

Y Grecian Gold

2 Tahitian Rose

3 Calypso Coral

6 Fawn

Promotional Models Available:

None