GENERAL SPECIFICATIONS
|
| Model Designation:
Biscayne, Bel Air, Impala and Station Wagons (all engines available) |
| Wheel base: 119 |
| Valve Location: In
head |
| Bore and
Stroke: 3.875 x 3.000 |
| Piston displacement, Cubic
Inches: 283 |
| Compression
ratio: 8.50 |
| Maximum
Brake Horsepower: 170
@ 4200 RPM |
| Maximum
Torque Lbs.Ft. @ RPM: 275
@ 2400 RPM |
| Normal
Oil Pressure Pounds: 35 |
TUNE UP SPECIFICATIONS (all models) |
| Spark Plug
Make: AC 44 |
| 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: 150 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: .010
Oil: .015 |
| Wristpin
Diameter, Inch: .9271 |
VALVE SPECIFICATIONS
|
Operating
Clearance:
w/mechanical valve lifters: Intake:
.012 Hot Exhaust: .018 Hot
w/hydraulic valve lifters and one carb: Intake: 0 Exhaust: 0 |
| Valve Seat
Angle, degrees: 46 |
Valve Timing: (BTDC
= before top dead center; ATDC = after top dead
center)
Intake
opens: 18 BTDC Exhaust
Closes: 20 ATDC |
Valve Spring
Pressure Pounds at Inches Length:
Inner
Spring: 160 @ 1.30 |
| Valve Lift Zero Lash: Intake: .3336 Exhaust: .3336 |
| Stem Diameter: Intake: .3415-.3422 Exhaust: .3410-.3417 |
| Valve Stem
Clearance: Intake: .001-.0027; Exhaust:
.0015-.0032 |
ENGINE BEARING SPECIFICATIONS
|
Connecting Rod Bearings:
Journal
Diameter, Inches: 1.999-2.000
Bearing Clearance, Inch: .0007-.0027 |
Main Bearings:
Journal
Diameter, Inches: 2.2978-2.2988
Bearing clearance: .0008-.0034
Shaft End Play: .002-.006 (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: 30-35 |
| Main Bearing Cap Bolts: 60-70 |
| Flywheel to Crankshaft: 55-65 |
| Vibration Damper or Pulley: Pressed on |
CAPACITY DATA
|
Cooling
System:
Without
heater: 17-1/2 quarts
With heater: 18-1/2 quarts |
| Fuel Tank: 20 gallons; 18 gallons in 9 pass. Station Wagons 17 gallons in 6 pass. Station Wagons |
| Engine
Oil: 4 quarts + 1 quart for filter change |
| Transmission: Standard: 2 pints; w/overdrive: 3 pints; Automatic: 3-1/2 quarts; 4 speed trans: 1-1/2 pints |
| Rear Axle: 4
pints |
|
DISTRIBUTOR SPECIFICATIONS
|
| Distributor part number: 1110947
(distributor rotates counter-clockwise) |
| Cam Angle,
degrees: 30 |
| 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: 1 @ 375 RPM
Full Advance: 14 @ 1875 RPM
Inches of Vacuum to Start Plunger Movement: 7-9
Inches of Vacuum for Full Plunger Movement: 15 - 16
Maximum Vacuum Advance Dist., Degrees: 7-1/2
|
| GENERATOR SPECIFICATIONS
|
| Generator Number: 1102097; 1102174 (w air. cond.); (generator rotates clockwise, 12 volts, Negative Ground) |
Generator output:
1102097: 30 amps @ 2240 RPM;
1102174: 35 amps @ 2510 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: 1107660 (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 |
