home Contact Us

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player







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 Hot  Exhaust: .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


-----