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Second Chance Garage

For the Classic Car
Restoration Enthusiast

Second Chance Garage

Second Chance Garage

For the Classic Car
Restoration Enthusiast

Second Chance Garage

Second Chance Garage

For the Classic Car Restoration Enthusiast

Second Chance Garage

ENGINE SPECS

1960 Chevrolet 348 V8 Engine Specs

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: 8 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 BTDCExhaust Closes: 25-1/2 ATDC

Valve Spring Pressure Pounds at Inches Length: Inner Spring: 184 @ 1.23

Valve Lift Zero Lash: Intake: .4005 Exhaust: .4119

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 SPECIFICATIONS (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; 9 pass. Station Wagons 18 gallons; 6 pass. Station Wagons: 17

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 DATA

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, 1102174 (w air. cond.) (generator rotates clockwise, 12 volts, Negative Ground)

Generator output: 1102097: 30 amps @ 2240 RPM;
1102174: 35 amps @ 2510

Brush Spring Tension: 28 oz.

REGULATOR SPECIFICATIONS

Regulator Number: 1119234, 1119002, 1119235

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; 119002 and 1119235: 35 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'