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ENGINE SPECS

1957 Chevrolet 235 Inline 6 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: 150, 210 & Bel Air (all engines available)
Wheel base: 115
Valve Location: In head
Bore and Stroke: 3.5625 x 3.9375
Piston displacement, Cubic Inches: 235
Compression ratio: 8.0
Maximum Brake Horsepower: 140 @ 4200 RPM
Maximum Torque Lbs.Ft. @ RPM: 210 @ 2400 RPM
Normal Oil Pressure Pounds: 35

TUNE UP SPECIFICATIONS (all models)

Spark Plug Make: AC 44
Spark Plug Gap, Inch: .035
Firing Order: 153624
Timing Mark: Ball on Flywheel
Engine Idle Speed, RPM:  425
Compression Pressure & Cranking Speed: 130 min.
Voltage & Polarity: 12 volts, negative ground

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale: Pistons removed from above. Shim thickness: .0015
Pounds on a Pull Scale: 7-18
Ring End Gap: In tapered bores, fit rings in tightest portion of ring travel
Compression: .007
Oil: .015
Wristpin Diameter, Inch: .8662

VALVE SPECIFICATIONS

Operating Clearance:
     Intake: 0  Exhaust: 0
Valve Seat Angle, degrees: 44
Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
         Intake opens: 22 BTDC
         Exhaust Closes: 27 ATDC
Valve Spring Pressure Pounds at Inches Length:
    Inner Spring: 65 @ 1.980
Valve Stem Clearance: Intake: .0001-.0025; Exhaust: .001-.0025

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 2.311-2.312
    Bearing Clearance, Inch: .001-.003

Main Bearings:
    Journal Diameter, Inches:
        Number 1: 2.6835-2.6845
        Number 2: 2.7145-2.7155
        Number 3: 2.7455-2.7465
        Number 4: 2.7765-2.7775

    Bearing clearance: .001-.003
    Shaft End Play: .003-.009    (Thrust on Bearing 3)

Engine Tightening Specs (ft./lbs.)
Spark Plugs: 20-25
Cylinder Head Bolts: 60-70
Intake Manifold: End clamp bolts: 15-20; Center clamp bolts: 25-30
Exhaust Manifold: End clamp bolts: 15-20; Center clamp bolts: 25-30
Rocker Arm Shaft Bracket: 25-30
Rocker Arm Covers: 25 (inch/lbs)
Connecting Rod Cap Bolts: 35-45
Main Bearing Cap Bolts: 100-110
Flywheel to Crankshaft: 50-65
Vibration Damper or Pulley: Pressed on

CAPACITY DATA

Cooling System:
    Without heater: 16 quarts
    With heater: 17 quarts
Fuel Tank: 16 gallons
Engine Oil: 5 quarts + 1 quart for filter change
Transmission: Standard: 2 pints; w/overdrive: 3 pints; Automatic: 5 quarts
Rear Axle: 3-1/2 pints
DISTRIBUTOR SPECIFICATIONS
Distributor part number: 1112403 (distributor rotates counter-clockwise)
Cam Angle, degrees: 28-35
Breaker Point opening, Inch: .016
Condenser Capacity: .18-.23 Mfds.
Breaker Arm Spring Tension: 19-23 Oz.

Centrifugal Advance: (degrees at RPM of distributor)
    Advance starts: 1 @ 375 RPM
    Full Advance: 13 @ 1750 RPM

    Inches of Vacuum to Start Plunger Movement: 4-6
    Inches of Vacuum for Full Plunger Movement: 7-1/2 - 10
    Maximum Vacuum Advance Dist., Degrees: 11

GENERATOR SPECIFICATIONS
Generator Number: 1100326, 1100321, 1102041, 1102042, 1102043 (generator rotates clockwise, 12 volts, Negative Ground)
Generator output: 1100325, 1100321: 25 amps @ 2780 RPM; 1102041, 1102042: 30 amps @ 2150; 1102043 30 amps at 2310 RPM
Brush Spring Tension: 28 oz.
REGULATOR SPECIFICATIONS
Regulator Number: 1119000, 1119001
Cutout Relay:
    Voltage to close points: 1119000: 12.8; 1119001: 12.6
    Armature Air Gap: .020
Voltage Regulator Setting: 14.5 volts
Current and Voltage Armature Air Gap: .075 inches
Current Regulator Setting: 30 amps
STARTING MOTOR SPECIFICATIONS
Part number: 1107652 (rotates clockwise)
Bush Spring Tension, Ounces: 35
No Load Test: 49-76 amps, 10.6 volts @ 6200-9400 RPM
Torque Test: 270-310 Amps, 4.25 volts; 10-1/2 ft.lbs torque

WHEEL ALIGNMENT SPECIFICATIONS

Caster, Degrees
    Limits: +1/2 to +1-1/2
    Desired: +1
Camber, Degrees
    Limits: 0 to +1
    Desired: +1/2
Toe-In, Inches: 5/32 to 7/32
Toe-Out on Turns, Degrees: (If toe-out is incorrect, when other adjustments are correct, look for bent steering arms.)
    Outer wheel: 18-1/2
    Inner Wheel: 20
Steering Axis Degrees: (If spindle support angle is incorrect, but camber is correct, look for bent suspension arms or steering knuckle support)
    3-1/2 to 4-1/2
 
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