1970 CHECKER

General Specifications

Chasis:

Marathon:

Wheelbase: 120"

Overall Length: 203"

Tire Size: 8.25 X 15 Inches

Marathon DeLuxe

Wheelbase: 129"

Overall Length: 212"

Tire Size: 8.25 X 15 Inches

Body Data:

Checker Marathon Series:

Model A12; 4 Door Sedan, 6 Passenger, Body #A12

Base Price: $3,671; Shipping Weight: 3,268 Pounds;

Model A12; 4 Door Station Wagon, 6 Passenger, Body #A12W

Base Price: $3,941; Shipping Weight: 3,470 Pounds;

Checker Marathon DeLuxe Series:

Model A12; 4 Door Sedan, 8 Passenger, Body #A12E

Base Price: $4,364; Shipping Weight: 3,378 Pounds;

Model A12; 4 Door Limousine, 8 Passenger, Body #A12E

Base Price: $5,338; Shipping Weight: 3,578 Pounds;

Engine Specifications:

6 Cylinder Engine, 250 Cu. In. 1 Barrel Carburetor, 155 HP:

Engine Type: Inline 6 Cylinder, Overhead Valve

Bore & Stroke: 3.875" X 3.53"

Engine Displacement: 250 Cu. In.

Compresssion Ratio: 8.5 to 1

Taxable Horsepower: 36.03

Horsepower: 155 @ 4,200 RPM

Torque: 235 Ft. Lbs. @ 1,600 RPM

Normal Oil Pressure: 30-45 Lbs/Sq. In

1Barrel Carburetor

8 Cylinder Engine-350 Cu. In., 215 HP:

Bore & Stroke: 4.001" X 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 8.00:1

Taxable Horsepower: 51.22

Horsepower: 215 @ 4,400 RPM

Torque: 320 Ft. Lbs @ 2,400 RPM

Normal Oil Pressure: 30-45 Lbs/Sq. In.

8 Cylinder Engine-350 Cu. In., 250 HP:

Bore & Stroke: 4.001" X 3.48"

Engine Displacement: 350 Cu. In.

Compression Ratio: 9.00:1

Taxable Horsepower: 51.22

Horsepower: 250 @ 4,800 RPM

Torque: 345 Ft. Lbs @ 2,800 RPM

Normal Oil Pressure: 30-45 Lbs/Sq. In.

Tune-Up Specifications:

6 Cylinder Engine:

Spark Plug Type: AC R46T

Sprk Plug Gap: .035"

Point Gap:

New Points: .019"

Used Points: .016"

Dwell Angle: 31 to 34 Degrees

Ignition Timing: 4 Degrees BTDC

Engine Idle Speed:

Manual Transmission: 700 RPM

Automatic Transmission: 600 RPM in Drive

8 Cylinder Engine:

Spark Plug Type: AC R44

Sprk Plug Gap: .035"

Point Gap:

New Points: .019"

Used Points: .016"

Dwell Angle: 28 to 32 Degrees

Ignition Timing: 4 Degrees BTDC

Engine Idle Speed:

Automatic Transmission: 600 RPM in Drive

Distributor Specifications:

Distributor #1110482

Advance Starts: 0 Degrees @ 500 RPM

Centrifugal Advance:

Intermediate Advance: 5 Degrees @ 700 RPM

Full Advance: 16 Degrees @ 2,150 RPM

Vacuum Advance:

Vacuum to Start Plunger: 6"

Maximum Advance: 7-1/2 Degrees @ 12" Vacuum

Distributor #1110495

Advance Starts: 0 Degrees @ 375 RPM

Centrifugal Advance:

Intermediate Advance: 1 Degree @ 525 RPM

7 Degrees @ 1,000 RPM

Full Advance: 14 Degrees @ 2,050 RPM

Vacuum Advance:

Vacuum to Start Plunger: 8"

Maximum Advance: 7-1/2 Degrees @ 15-1/2" Vacuum

Distributor #1112002

Advance Starts: 0 Degrees @ 450 RPM

Centrifugal Advance:

Intermediate Advance: 1 Degree @ 550 RPM

4 Degrees @ 700 RPM

Full Advance: 16 Degrees @ 2,200 RPM

Vacuum Advance:

Vacuum to Start Plunger: 7"

Maximum Advance: 12 Degrees @ 17" Vacuum

Valve Specifications:

6 Cylinder Engines:

Valve Lash: Hydralic Lifters-1 Turn Down From Zero Lash

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height, Installed: 1.66"

Valve Spring Pressure: 186 Lbs. @ 1.27"

Valve Stem Clearance:

Intake: .001" to .0027"

Exhaust: .0015" to .0032"

Valve Stem Diameter:

Intake: .3410" to .3417"

Exhaust: .3410" to .3417"

8 Cylinder Engines:

Valve Lash: Hydralic Lifters-1 Turn Down From Zero Lash

Valve Angles:

Seat: 46 Degrees

Face: 45 Degrees

Valve Spring Height, Installed: 1.70"

Valve Spring Pressure: 200 Lbs. @ 1.25"

Valve Stem Clearance:

Intake: .001" to .0027"

Exhaust: .0012" to .0027"

Valve Stem Diameter:

Intake: .3410" to .3417"

Exhaust: .3410" to .3417"

Pistons, Pins, Rings, Crankshaft, & Bearing Specifications:

6 Cylinder Engine:

Piston Clearance: .0015" to .0025"

Ring End Gap:

Compression: .010"

Oil: .015"

Wrist Pin Diameter: .9272"

Rod Bearings

Shaft Diameter: 1.999" to 2.000"

Bearing Clearance: .0007" to .0027"

Main Bearings:

Shaft Diameter: 2.2983" to 2.2993"

Bearing Clearance: .0003" to .0029"

Thrust on Bearing #7

Shaft End Play: .002" to .006"

8 Cylinder Engine, 350 Cu. In.:

Piston Clearance: .0007" to .0013"

Ring End Gap:

Compression:

Top Ring: .010"

Bottom Ring: .013"

Oil: .015"

Wrist Pin Diameter: .9272"

Rod Bearings

Shaft Diameter: 2.099" to 2.100"

Bearing Clearance: .0007" to .0028"

Main Bearings:

Shaft Diameter:

#1, 2, 3, & 4: 2.4484" to 2.4493"

#5: 2.4479" to 2.4488"

Bearing Clearance:

#1: .0003" to .0015"

#2, 3, 4: .0011" to .0023"

#5: .0017" to .0033"

Thrust on Bearing #5

Shaft End Play: .002" to .006"

Engine Tightening Specifications:

6 Cylinder Engine:

Spark Plugs: 25 Ft. Lbs

Cylinder Heat Bolts: 95 Ft. Lbs.

Intake Manifold:

End Bolts: 20 Ft. Lbs

Center Bolts: 30 Ft. Lbs.

Exhaust Manifold

End Bolts: 20 Ft. Lbs

Center Bolts: 30 Ft. Lbs'

Rocker Arm Cover: 55 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: Pressed On

8 Cylinder Engine, 350 Cu. In.:

Spark Plugs: 25 Ft. Lbs

Cylinder Heat Bolts: 65 Ft. Lbs.

Intake Manifold: 30 Ft. Lbs.

Exhaust Manifold:

Inside Bolts: 30 Ft. Lbs

Outside Bolts: 20 Ft. Lbs.

Rocker Arm Cover: 55 Inch Lbs.

Connecting Rod Cap Bolts: 45 Ft. Lbs.

Main Bearing Cap Bolts: 75 Ft. Lbs.

Flywheel to Crankshaft: 60 Ft. Lbs.

Vibration Damper or Pulley: 60 Ft. Lbs.

Alternator Specifications:

Make: Motorola

Model #: 8AL-2001

Amperes: 35

Volts: 15

Field Current: 1.8 to 2.4 Amperes, 12.6 Volts

Voltage Regulator #R2CC1

Regulator Test @ 120 Degrees F:

10 Amperes @ 1,500 RPM (Alternator) @ 13.7 to 14.5 Volts

Make: Motorola

Model #: 8AL-2002

Amperes: 55

Volts: 15

Field Current: 1.8 to 2.4 Amperes, 12.6 Volts

Voltage Regulator #8RD2009

Regulator Test @ 120 Degrees F:

10 Amperes @ 2,000 RPM (Alternator) @ 13.4 to 13.9 Volts

Starting Motor Specifications:

6 Cylinder Engine:

Starter #1108365

Brush Spring Tension: 35 Ounces

Free Speed Test: 49-87 Amperes, 10.6 Volts @ 6,200-10,700 RPM

Resistance Test: 290-425 Amperes @ 4.2 Volts

8 Cylinder Engine:

Starter #1108420

Brush Spring Tension: 35 Ounces

Free Speed Test: 65-95 Amperes, 9 Volts @ 7,500-10,500 RPM

Resistance Test: Not Available

Rear Axle Specifications:

Model #44

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005" to .010"

Pinion Bearing Preload:

Method: Shims

New Bearings: 20 to 40 Inch Pounds

Used Bearings: 10 to 20 Inch Pounds

Differential Bearing Preload:

Method: Shims

New Bearings: .015 Inch Pounds

Used Bearings: .015 Inch Pounds

Model #62

Carrier Type: Integral

Ring Gear & Pinion Backlash:

Method: Shims

Adjustment: .005" to .009"

Pinion Bearing Preload:

Method: Shims

New Bearings: 20 to 40 Inch Pounds

Used Bearings: 10 to 20 Inch Pounds

Differential Bearing Preload:

Method: Shims

New Bearings: .015 Inch Pounds

Used Bearings: .015 Inch Pounds

Brake Specifications:

All Models except Aerobus:

Brake Drum Diameter: 11"

Wheel Cylinder Bore:

Front Disc: 2-15/16"

Front Drum: 1-1/8"

Rear Drum: 15/16"

Master Cylinder Bore:

Disc Brakes: 1-1/8"

Drum Brakes: 1"

Power Brakes: 1"

Aerobus:

Brake Drum Diameter: 11"

Wheel Cylinder Bore:

Front Drum: 1-1/8"

Rear Drum: 1"

Master Cylinder Bore:

Power Brakes: 1"

Capacities:

6 Cylinder Models:

Cooling System:

Without Heater: 11 Quarts

With Heater: 12 Quarts

With Air Conditioning: 12 Quarts

Radiator Cap Pressure: 13 PSI

Thermostat Opening: 195 Degrees

Fuel Tank: 23 Gallons

Engine Oil Refill with New Filter: 5 Quarts

Transmission:

3 Speed Manual: 2.6 Pints

Automatic Transmission: 8-1/2 Quarts

Rear Axle: 3 Pints

8 Cylinder Models, Marathon & Taxi:

Cooling System:

Without Heater: 16 Quarts

With Heater: 17 Quarts

With Air Conditioning: 17 Quarts

Radiator Cap Pressure: 13 PSI

Thermostat Opening: 195 Degrees

Fuel Tank: 23 Gallons

Engine Oil Refill with New Filter: 5 Quarts

Transmission:

3 Speed Manual: 2.6 Pints

Automatic Transmission: 8-1/2 Quarts

Rear Axle: 3 Pints

8 Cylinder Models, Aerobus:

Cooling System:

With Heater: 17 Quarts

With Air Conditioning: 17 Quarts

Radiator Cap Pressure: 13 PSI

Thermostat Opening: 180 Degrees

Fuel Tank: 23 Gallons

Engine Oil Refill with New Filter: 5 Quarts

Transmission:

3 Speed Manual: 2.6 Pints

Automatic Transmission: 8-1/2 Quarts

Rear Axle: 6 Pints

Rochester Carburetor Specifications:

1 Barrel:

Carburetor #: 7040014

Float Level: 1/4"

Metering Rod: .070"

Fast Idle, Bench Adjustment: .100"

Choke Rod: .170"

Vacuum Break: .200"

Unloader: .350"

Fast Idle: 2,400 RPM

2 Barrel:

Carburetor #: 7040114, 7040116

Float Level: 23/32"

Float Drop: 1-3/8"

Pump Rod: 1-17/32"

Idle Vent: .025"

Vacuum Break: .200"

Choke Rod: .085"

Choke Unloader: .325"

Carburetor #: 7040134, 7040136

Float Level: 23/32"

Float Drop: 1-11/32"

Pump Rod: 1-17/32"

Idle Vent: .025"

Vacuum Break: .200"

Choke Rod: .085"

Choke Unloader: .325"

Carburetor #: 7040123

Float Level: 23/32"

Float Drop: 1-3/8"

Pump Rod: 1-17/32"

Idle Vent: .020"

Carburetor #: 7040414, 7040416

Float Level: 23/32"

Float Drop: 1-3/8"

Pump Rod: 1-17/32"

Vacuum Break: .200"

Choke Rod: .085"

Choke Unloader: .325"

Carburetor #: 7040434

Float Level: 23/32"

Float Drop: 1-11/32"

Pump Rod: 1-17/32"

Idle Vent: .020"

Vacuum Break: .215"

Choke Rod: .085"

Choke Unloader: .325"

4 Barrel:

Carburetor #7029202

Float Level: 7/32"

Pump Rod Hole: Inner

Idle Vent: 3/8"

Fast Idle (Bench): 2 Turns

Choke Rod: .100"

Vacuum Break: .180"

Air Valve Dashpot: .0015

Choke Unloader: .450"

Carburetor #7040202, 7040502

Float Level: 1/4"

Pump Rod Hole: Inner

Fast Idle (Bench): 2 Turns

Choke Rod: .100"

Vacuum Break: .245"

Air Valve Dashpot: .020"

Choke Unloader: .400"

1970 CHECKER

Popular Options:

Power Steering, Power Brakes, Air Conditioning, Heater & Defroster, Whitewall Tires, Full Wheel Discs, Two-Tone Paint, Heavy Duty Shock Absorbers, Jump Seats, Power Side Windows, Heavy Duty Battery, Limited Slip Differential, V-8 Engine, Overdrive, Automatic Transmission.

1970 Checker Historical Data:

1970 Checker Model Year introduction was on September 1, 1969.

Model Year Production:

397 Private Passenger Cars

3,603 Taxi Cabs

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