1931 Durant Model 612

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Introduced in 1930, the 112 inch wheelbase, model 612 featured a 58 horsepower six-cylinder engine, A.C. oil filter and the"Pullman attachment". The "Pullman attachment" converts the interior of the car into a reclining couch.

Period factory illustration of the 1931 Durant 612 Tourist Sedan
Tourist Sedan

Special features

  • Six cylinder engine
  • Equipped with the "Pullman attachment" (a fully reclining front seat)

Body styles and prices

  • Tourist Sedan 1

Notes: 1 Tourist Sedan equipment includes: wheels, six wire wheels with two wheels mounted in front fender wells, two spare tires, trunk rack.

Serial number range

  • L-1001 to L-2000

The serial number prefix shows the factory. See Durant Serial Numbers for every year and plant.

Specifications

ItemSpecification
EngineContinental built. Six cylinders, L-head type, detachable head; bore, 3-1/4"; stroke, 4"; piston displacement, 199 cubic inches; taxable horsepower, 25.4; brake horsepower, 71 at 3,100 R.P.M; engine mounted in rubber. Compression ratio 5.32. Maximum torque 144 foot pounds at 1,300 R.P.M.
CylindersCast en-bloc with upper half of crankcase.
ValvesIntake, 1-9/16"; exhaust, 1-7/16"; valve lift, 11/32".
Crankshaft BearingsFront, 2-3/8" diameter by 1-7/16"; two intermediate, 2-3/8" diameter by 1-9/16"; rear, 2-3/8" diameter by 1-7/8". All bearings are bronze back, babbitt lined, of the interchangeable type, using no shims.Torsonal vibration damper on crankshaft.
Camshaft BearingsFront, 2-1/16" diameter by 1-7/32"; intermediate, front, 2" diameter by 3/4"; intermediate, rear, 1-15/16" diameter by 3/4"; rear, 1-7/8" diameter by 1". All bearings are steel back, babbitt lined.
Engine LubricationForce feed to main bearings, connecting rod bearings and camshaft bearings. Gear type pump. A.C. oil filter on engine.
Cooling SystemCentrifugal pump; radiator capacity, 14 quarts.
Gasoline SupplyCapacity of tank, 12 gallons; fuel pump.
Carburetor1-1/4"; air cleaner.
ClutchSingle-plate, dry-disc. Enclosed in flywheel.
TransmissionSelective sliding-gear type; three speeds forward and one reverse; unit mounted with engine.
Front AxleStandard drop-forged "I" beam section with reverse Elliott type steering mechanism. Tapered roller wheel bearings and ball thrust bearings used on steering knuckle king pins.
Rear AxleSemi-floating, with spiral ring-gear and pinion. Gear ratio, 4.4 to 1
Steering GearSemi-irreversible, worm-and-gear type. Ball thrust bearings. 17" steering wheel.
BrakesMidland steeldraulic, 4-wheel, 11" diameter, 1-1/2" wide.
Chassis LubricationZerk pressure gun.
SpringsSemi-elliptic; front, 36" by 1-3/4", 7-leaves; rear, 55" by 2", 7 leaves.
WheelsStandard equipment, six wire wheels with two wheels mounted in front fender wells, two spare tires.
Tires19 x 5.00
Wheelbase112 inches.
Starting, Lighting, IgnitionElectric Auto-Lite starting and lighting system. 13-plate, 106-ampere-hour U.S.L. storage battery.
Standard EquipmentIncludes temperature indicator and gasoline gauge, speedometer, ammeter, oil gauge, pull controls for spark, throttle and choke, coincidental ignition and coil lock, foot pedal headlight control, rear view mirror, automatic windshield wiper, front and rear bumpers, hydraulic two-way shock absorbers, air cleaner, oil filter, trunk rack. All bright finished exterior hardware chromium plated.

Related pages

Sources: Durant Family Registry, Durant’s Standard, vol. 9 no. 4; Original Durant literature: A-31-102-4.