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GENERAL SPECIFICATIONS

Model Designation: Six Cylinder; Special 6, JJ; De Luxe 6 (without Powerglide trans.) JK.

Wheel base: 115

Valve Location: In head

Bore and Stroke: 3-1/2 x 3-3/4

Piston displacement, Cubic Inches: 216.5

Compression ratio: 6.60

Maximum Brake Horsepower: 92 @ 3400 RPM

Maximum Torque Lbs.Ft. @ RPM: 176 @ 1500

Normal Oil Pressure Pounds: 14

TUNE UP SPECIFICATIONS

Spark Plug Make: AC 46-5

Spark Plug Gap, Inch: .035

Firing Order: 153624

Ignition Timing: Timing mark: steel ball located on flywheel

Engine Idle Speed, RPM: Manual shift trans. 475; automatic trans. 425

Cylinder Head Torque Lbs.Ft.: 75-80

Compression Pressure & Cranking Speed: 110

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale:     Removed from Above Shim thickness to use:     Pistons should pass on a .002 feeler with light pressure, and lock on a .003 feeler;

Rings: (for tapered bores for minimum clearance fit rings in tightest portion of ring travel)     Ring Gap, Minimum: Compression: .005     Ring Gap, Minimum: Oil: .005     Clearance in Groove: Compression: .0015-.003     Clearance in Groove: Oil: .002-.0035

Wristpin Diameter, Inch: .8645-.8650

VALVE SPECIFICATIONS

Operating Clearance:   Standard Trans.:  Intake: .006 Hot;   Exhaust: .015 Hot   Automatic Trans.: Intake: 0; Exhaust: 0

Clearance for Timing Intake: 0

Valve Seat Angle, degrees: Intake 31; exhaust 46

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)    Standard Trans.:  Intake opens: 1 degree ATDC;  Exhaust Closes Degrees ATDC: 9    Automatic Trans: Intake opens: 16 BTDC, Exhause Closes Degrees ATDC: 17-1/2

Valve Spring Pressure Pounds at Inches Length:      Spring: Standard: 125 @ 1-1/2; Automatic: 160 @ 1-1.2

Valve Stem Clearance:     Intake: .001-003     Exhaust: .002-.004

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:     Journal Diameter, Inches: 2.311-2.312     Bearing Clearance, Inch: .0003-.0013     Rod End Play, Inch: .004-.012     Rod Bolt Tension, Lbs.Ft.: 35-45

Main Bearings:     Journal Diameter, Inches: Front: 2.6835 - 2,6845; No. 2: 2.7145-2.7155; No. 3: 2.7455-2.7465; No. 4: 2.7765-2.7775     Bearing Clearance, Inch: .0007-.0028     Crankshaft End Play, Inch (taken on No. 3 bearing): .003-.009     Main Bolt Tension, Lbs.Ft.: 100-110

CAPACITY DATA

Cooling System:     Without heater: 15 quarts     With heater: 16 quarts

Fuel Tank: 16 gallons

Engine Oil: 5 quarts

Transmission: 1-1/2 pints;

Rear Axle: 3-1/2 pints