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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

1953 Buick 263 (125 hp) Inline 8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: Special 8 - Series 40

Wheel base: Special 8: 121-1/2

Valve Location: In head

Bore and Stroke: 3-3/16 x 4-1/8

Piston displacement, Cubic Inches: 263.3

Compression ratio: Special 8: 7.0

Maximum Brake Horsepower: 125 @ 3800 RPM

Maximum Torque Lbs.Ft. @ RPM: 224 @ 2200 RPM

Normal Oil Pressure Pounds: 35

TUNE UP SPECIFICATIONS

Spark Plug Make: AC 46X

Spark Plug Gap, Inch: .025

Firing Order: 16258374

Ignition Timing: ADV. Timing mark on Flywheel

Engine Idle Speed, RPM: 450

Cylinder Head Torque Lbs.Ft.: 65-70

Compression Pressure & Cranking Speed: 114 Min.

Voltage & Polarity: 6 volts, negative ground

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale: Piston should fall on a .0015 feeler and stay on a .002 feeler

Ring End Gap: (Fit rings in tapered bores for clearance shown in tightest portion of ring travel.)
Compression: .015
Oil: .015 (no fitting necessary with Flex-Fit oil rings)

Clearance in Groove: Compression: .0015-0035; Oil: .0015-.003 (Flex-Fit oil rings: .0015-.0035

Wristpin Diameter, Inch: .8124-.8129

VALVE SPECIFICATIONS

Operating Clearance: Intake: .015 HotExhaust: .015 Hot (0 with hydraulic lifters)

Valve Seat Angle, degrees: 45

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
Intake opens: 13 degrees BTDC
Exhaust Closes: 22 ATDC

Valve Spring Pressure Pounds at Inches Length: Inner Spring: 52 @ 1-5/16; Outer Spring: 119 @ 1-19/32

Valve Stem Clearance: Intake: .0025;Exhaust: .003

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings: Journal Diameter, Inches: 2.125-2.126
Bearing Clearance, Inch: .0005-.002
Rod End Play, Inch: .005-.010
Rod Bolt Tension: Lbs.Ft.: 40-45

Main Bearings: Journal Diameter, Inches:
No. 1: 2.5605-2.5615
No. 2: 2.6235-2.6145
No. 3: 2.6855-2.6865
No. 4: 2.7485-2.7495
No. 5: 2.8105-2.8115
Bearing clearance: .0005-.002
Shaft End Play: .004-.008(Thrust on Bearing No. 3)
Main Bolt Tension: Lbs.Ft.: 90-100

CAPACITY DATA

Cooling System: Without heater: 12 quarts (with Dynaflow 13-1/2)
With heater: 13-1/2; quarts (with Dynaflow 15)

Fuel Tank: 19 gallons

Engine Oil: 5-1/2 quarts

Transmission: 1-3/4 w/auto 9-1/2 qts.

Rear Axle: 4-1/2 pints

Other 1953 Buick Engine Specs

1953 Buick 263 (125 hp) Inline 8 Engine Specs

1953 Buick 263 Inline 8 Engine Specs:
Delco-Remy Distributor Specs


1953 Buick 263 Inline 8 Engine Specs:
Delco-Remy Generator Specs


1953 Buick 263 Inline 8 Engine Specs:
Delco-Remy Regulator Specs


1953 Buick 263 Inline 8 Engine Specs:
Delco-Remy Starting Motor Specs


1953 Buick 263:
Wheel Alignment Specs


Return to Buick Engine Specs Index