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Second Chance Garage

For the Car Restoration Enthusiast

Second Chance Garage

Second Chance Garage

For the Car Restoration Enthusiast

Second Chance Garage

For the Car Restoration Enthusiast

Second Chance Garage
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ENGINE SPECS

1955 Cadillac 331 (270 hp) V8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: El Dorado Series 62

Wheel base: Series 62: 129

Valve Location: In head

Bore and Stroke: 3-13/16 x 3-5/8

Piston displacement, Cubic Inches: 331.0

Compression ratio: 9.1

Maximum Brake Horsepower: El Dorado: 270 @ 4800 RPM

Maximum Torque Lbs.Ft. @ RPM: 345 @ 3200 RPM

Normal Oil Pressure Pounds: 35

TUNE UP SPECIFICATIONS (all models)

Spark Plug Make: AC 44-5

Spark Plug Gap, Inch: .035

Firing Order: 18436572 (front to rear: Right bank 2-4-6-8, left bank 1-3-5-7)

Timing Mark: "A" mark for premiurm fuel; "C" mark for regular fuel; location: Vib. Damper

Engine Idle Speed, RPM: w/automatic 400 (in drive)

Cylinder Head Torque Lbs.Ft.: 65-70

Compression Pressure & Cranking Speed: 165 min.

Voltage & Polarity: 12 volts, negative ground

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale: Pistons removed from above. Shim thickness: .002

Pounds on a Pull Scale: 11

Ring End Gap: In tapered bores, fit rings in tightest portion of ring travel
Compression: .010
Oil: .010

Clearance in Groove: Compression: .0017-0035; Oil: .0015-.003

Wristpin Diameter, Inch: 1.000

VALVE SPECIFICATIONS

Operating Clearance: Intake: 0Exhaust: 0

Valve Seat Angle, degrees: 44

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
Intake opens: 19 BTDC
Exhaust Closes: 30 ATDC

Valve Spring Pressure Pounds at Inches Length: Inner Spring: 60 @ 1-11/16

Valve Stem Clearance: Intake: .0005-.0025;Exhaust: .001-.0025

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings: Journal Diameter, Inches: 2.2488-2.2493
Bearing Clearance, Inch: .0005-.002
Rod End Play, Inch: .008-.014
Rod Bolt Tension: Lbs.Ft.: 40-45

Main Bearings: Journal Diameter, Inches: 2.4990-2.4995
Bearing clearance: .0008-.0025
Shaft End Play: .001-.005(Thrust on Rear Bearing)
Main Bolt Tension: Lbs.Ft.: 90-100

CAPACITY DATA

Cooling System: Without heater: Series 60, 62: 18 quarts; With heater: 20-1/3 quarts
Without heater: Series 75: 18 quarts; With heater: 22-4/5 quarts

Fuel Tank: 20 gallons

Engine Oil: 5 quarts

Transmission: Automatic: 12 quarts

Rear Axle: 5 pints

Other 1955 Cadillac engine specs

1955 Cadillac 331 V8 (250 hp) Engine Specs

1955 Cadillac 331 V8 (270 hp) Engine Specs

1955 Cadillac 331 (270 hp) V8:
Distributor Specs


1955 Cadillac 331 (270 hp) V8:
Generator Specs


1955 Cadillac 331 (270 hp) V8:
Regulator Specs


1955 Cadillac 331 (270 hp) V8:
Starting Motor Specs


1955 Cadillac 331 (270 hp) V8:
Engine Tightening Specs


1955 Cadillac:
Wheel Alignment Specs


Return to Cadillac Engine Specs Index