GENERAL SPECIFICATIONS
|
| Model Designation:
Biscayne, Bel Air, Impala and Station Wagons (all engines available) |
| Wheel base: 119 |
| Valve Location: In
head |
| Bore and
Stroke: 4.125 x 3.25 |
| Piston displacement, Cubic
Inches: 348 |
| Compression
ratio: 9.50 |
| Maximum
Brake Horsepower: 250
@ 4400 RPM |
| Maximum
Torque Lbs.Ft. @ RPM: 355
@ 2800 RPM |
| Normal
Oil Pressure Pounds: 35 |
TUNE UP SPECIFICATIONS (all models) |
| Spark Plug
Make: AC 44N |
| Spark Plug
Gap, Inch: .035 |
| Firing
Order: 18436572 (front to rear left bank: 1-3-5-7, right bank: 2-4-6-8) |
| Timing
Mark: 4 degrees BTDC; Location: Damper |
| Engine
Idle Speed, RPM: 425 |
| Compression
Pressure & Cranking Speed: 160 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: .015
Oil: .015 |
| Wristpin
Diameter, Inch: .9896 |
VALVE SPECIFICATIONS
|
Operating
Clearance:
Intake: 0 Exhaust: 0 |
| Valve Seat
Angle, degrees: 46 |
Valve Timing: (BTDC
= before top dead center; ATDC = after top dead
center)
Intake
opens: 18-1/2 BTDC Exhaust
Closes: 25-1/2 ATDC |
Valve Spring
Pressure Pounds at Inches Length:
Inner
Spring: 184 @ 1.23 |
| Valve Lift Zero Lash: Intake: .3987 Exhaust: .3987 |
| Stem Diameter: Intake: .3715-.3722 Exhaust: .3410-.3417 |
| Valve Stem
Clearance: Intake: .001-.0027; Exhaust:
.0025-.0042 |
ENGINE BEARING SPECIFICATIONS
|
Connecting Rod Bearings:
Journal
Diameter, Inches: 2.199-2.200
Bearing Clearance, Inch: .0007-.0027 |
Main Bearings:
Journal
Diameter, Inches: 2.4980-2.4990
Bearing clearance: .0006-.0032
Shaft End Play: .003-.007 (Thrust
on Bearing 5)
|
| Engine Tightening Specs (ft./lbs.) |
| Spark Plugs: 25 |
| Cylinder Head Bolts: 60-70 |
| Intake Manifold: 25-35 |
| Exhaust Manifold: Center clamp bolts 25-30; end clamp bolts: 15-20 |
| Rocker Arm Shaft Bracket: none |
| Rocker Arm Covers: 25 (inch/lbs) |
| Connecting Rod Cap Bolts: 35-45 |
| Main Bearing Cap Bolts: 95-105 |
| Flywheel to Crankshaft: 55-65 |
| Vibration Damper or Pulley: Pressed on |
CAPACITY DATA
|
Cooling
System:
Without
heater: 21 quarts
With heater: 22 quarts |
| Fuel Tank: 20 gallons; Station Wagon 17 gallons |
| Engine
Oil: 4 quarts + 1 quart for filter change |
| Transmission: Standard: 2 pints; w/overdrive: 3 pints; Automatic: 3-1/2 quarts |
| Rear Axle: 4
pints |
|
DISTRIBUTOR SPECIFICATIONS
|
| Distributor part number: 1110948, 1110914, 1110915
(distributor rotates counter-clockwise) |
| Cam Angle,
degrees: 30; 1110914: adjust cam angle of each breaker separately to 28-30 deg giving a point opening of .014-.108. Cam angle for both breakers should be 33-35 degrees. |
| Breaker Point opening, Inch: Turn adjusting screw in (clockwise) until engine misfires. Then turn screw 1/2 turn in opposite direction. |
| Condenser
Capacity: .18-.23
Mfds. |
| Breaker Arm Spring Tension: 19-23
Oz. |
Centrifugal Advance: (degrees
at RPM of distributor)
Advance starts: 1110948: 1 @ 425 RPM; 1110914: 1 @ 600 RPM; 1110915: 1-1/2 @ 400 RPM
Full Advance: 1110948: 12 @ 2300 RPM; 1110914: 11 @ 3000 RPM; 1110915: 14 @ 1850 RPM
Inches of Vacuum to Start Plunger Movement: 7-9; 1110914: 3-3/4 - 5-3/4
Inches of Vacuum for Full Plunger Movement: 15 - 16; 1110914: 10-1/2 - 12-1/2
Maximum Vacuum Advance Dist., Degrees: 7-1/2; 1110914: 8-1/4 - 10-1/4
|
| GENERATOR SPECIFICATIONS
|
| Generator Number: 1102097; 1102114 (w air. cond.); 1102115 (w pwr steer.) (generator rotates clockwise, 12 volts, Negative Ground) |
Generator output:
1102097: 30 amps @ 2240 RPM;
1102114: 35 amps @ 2630 RPM;
1102115: 35 amps @ 2630 RPM |
| Brush Spring Tension: 28 oz. |
| REGULATOR SPECIFICATIONS
|
| Regulator Number: 1119001, 1119002 |
Cutout Relay:
Voltage to close points: 12.6
Armature Air Gap: .020 |
| Voltage Regulator Setting: 14.3 volts |
| Current and Voltage Armature Air Gap: .075 inches |
| Current Regulator Setting: 30 amps |
| STARTING
MOTOR SPECIFICATIONS
|
| Part number: 1107688; 1107687, 1107712 (rotates clockwise) |
| Bush Spring
Tension, Ounces: 35 |
| No Load
Test: 65-100
amps, 10.6 volts @ 3600-5100 RPM; 1107712: 80-120 amps 10.6 volts @ 4700-5400 RPM |
| Torque
Test: 300-360 Amps, 3.5
volts; 10-1/2 ft.lbs torque; 1107712: 390-370 amps, 2.00 volts |
WHEEL ALIGNMENT SPECIFICATIONS
|
Caster,
Degrees
Limits: -1/2 to +1-1/2
Desired: 0 |
Camber,
Degrees
Limits: 0 to +1
Desired: +1/2 |
| Toe-In,
Inches: 1/16 to 1/8 |
Toe-Out
on Turns, Degrees: (If
toe-out is incorrect, when other adjustments are
correct, look for bent steering arms.)
Outer wheel: 17 degrees 54'
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)
7 degrees 11' |
