ENGINE SPECS

1951 Plymouth 217 Inline Six Engine Specs

GENERAL SPECIFICATIONS

Model Designation: Six Cylinder
Concord 6, Suburban 6, Savoy 6: P22
Cambridge 6, Cranbrook 6: P23

Wheel base: De Luxe, Suburban, Savoy: 111; Cambridge, Cranbrook: - 118-1/2

Valve Location: In block

Bore and Stroke: 3-1/4 x 4-3/8

Piston displacement, Cubic Inches: 217.8

Compression ratio: 7.0

Maximum Brake Horsepower: 97 @ 3600 RPM

Maximum Torque Lbs.Ft. @ RPM: 175 @ 1200

Normal Oil Pressure Pounds: 45

TUNE UP SPECIFICATIONS

Spark Plug Make: Auto-Lite AR8

Spark Plug Gap, Inch: .035

Firing Order: 153624

Ignition Timing: TDC. Timing mark: Vib. Damp.

Engine Idle Speed, RPM: 475

Cylinder Head Torque Lbs.Ft.: 70

Compression Pressure & Cranking Speed: 120 Min.

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:
Removed from above
Piston fitted properly when it has slight drag in the bore, yet is free enough to fall slowly through of its own weight with parts clean and dry.

Rings: (Fit rings in tapered bores for clearance shown in tightest portion of ring trave.)
Compression: .012; Oil: .012
Clearance in groove: Compression: .002-.004; Oil: .001-.0025

Wristpin Diameter, Inch: .8591-.8593

VALVE SPECIFICATIONS

Operating Clearance:
Intake: .010 Hot Exhaust: .010 Hot

Valve Seat Angle, degrees: 45

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
Intake opens: 12 degrees BTDC
Exhaust Closes: 6 ATDC

Valve Spring Pressure Pounds at Inches Length:
Spring: 40 @ 1-3/4

Valve Stem Clearance:
Intake: .002
Exhaust: .004

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 2.0615 - 2.0625
    Bearing Clearance, Inch: .0005-.0015
    Rod End Play, Inch: .006-.011
    Rod Bolt Tension, Lbs.Ft.: 45-50

Main Bearings:
    Journal Diameter, Inches: 2.499-2.500
    Bearing clearance: .0005-.0015
    Shaft End Play: .003-.007 (Thrust taken by rear bearing)
    Main bolt tension, Lbs.Ft.: 80-85

CAPACITY DATA

Cooling System:
Without heater: 13 quarts
With heater: 14 quarts

Fuel Tank: 17 gallons

Engine Oil: 5 quarts

Transmission: 2-3/4 pints

Rear Axle: 3-1/4 pints

AUTO-LITE DISTRIBUTOR SPECIFICATIONS

Distributor part number: 1AT-4011 (distributor rotates clockwise)

Cam Angle, degrees: 39

Breaker Point opening, Inch: .020 Plus or minus .002

Condenser Capacity: .25-.28 Mfds.

Breaker Arm Spring Tension: 17-20 Oz.

Centrifugal Advance: (degrees at RPM of distributor)
Advance starts: 1 degree @ 450
Full Advance: 10 degrees @ 1425

Vacuum Advance Data:
   Degrees @ Inches of Mercury:
    Advance starts: 1 @ 5-1/2
    Full Advance: 8 @ 14

AUTO-LITE GENERATOR SPECIFICATIONS

Generator Number: GGW-6001B, GGW-6001K (generator rotates clockwise, 6 volts, Positive Ground)

Generator output: 45 @ 2125 RPM

Brush Spring Tension: 35-53 oz.

Field Current: 1.4 - 1.5 at 5 volts

AUTO-LITE REGULATOR SPECIFICATIONS

Regulator Number: VBE-6001A

Cutout Relay:
    Voltage to close points: 6.5
    Reverse current to Open Points (Amps): 4-6
    Armature Air Gap: .031

Voltage Regulator Setting: 7.3 volts

Current Regulator Setting: 35 amps

Current and voltage armature air gap, Inch: .048

AUTO-LITE STARTING MOTOR SPECIFICATIONS

Part number: MCH-6201 (starter rotates clockwise)

Bush Spring Tension, Ounces: 42-53

No Load Test: 65 amps, 5.0 volts @ 4300 RPM

Torque Test: 335 Amps, 2.0 volts, Torque, Lbs.Ft.: 6.0

ENGINE TIGHTENING SPECIFICATIONS (FT. LBS.)

Spark Plugs: 26-32

Cylinder Head Bolts: 65-70

Connecting Rod Cap Bolts: 45-50

Main Bearing Cap Bolts: 80-85

Flywheel to Crankshaft: 55-60

WHEEL ALIGNMENT SPECIFICATIONS

Caster, Degrees
Limits: -1 to + 1

Camber, Degrees
Limits: 0 to +3/4

Toe-In, Inches: 0 to 1/16

Toe-Out on Turns, Degrees: (If toe-out is incorrect, when other adjustments are correct, look for bent steering arms.)
Outer wheel: 20
Inner Wheel: 22