Jeep CJ3A Specifications
 

 


 
 
 
 
 


 
 
 
 

Engine "Go-Devil" L-Head
Number of cylinders........................................4
Bore...............................................................3 1/8" 
Stroke............................................................4 3/8" 
Piston Displacement........................................134.2 cu. in. 
Compression Ratio..........................................6.48 to 1
Horsepower -- SAE........................................15.6
Horsepower (actual @ 4,000 RPM)................60
Torque (max. @ 2,000 RPM).........................105 Lbs. Ft.

Dimensions and Capacities
Wheelbase......................................................80" 
Tread..............................................................48 1/4"
Overall Width..................................................59"
Overall Height (Top up)...................................69 3/8"
Overall Height (Top down)..............................52 3/8"
Overall Length.................................................122 3/4"
Road Clearance...............................................8 5/8"
Weight -- Maximum Payload............................800 lbs.
                Shipping (Less water, oil and fuel).....2,037 lbs.
                Curb (Including water, oil and fuel)....2,137 lbs.
                Gross (Loaded)................................2,937 lbs.
Maximum Approved Draw Bar Pull
     (Continuous Operation)................................1,200 lbs.
Fuel Tank Capacity...........................................10.5 gals.
Cooling System Capacity...................................11 qts.

Lamp Bulbs
Head Lamp (7 in. Sealed Beam Type)
     Upper Beam.................................................45 watts
     Lower Beam................................................35 watts
Parking Lamp Bulb............................................3 CP-SC
Tail Lamp Bulb..................................................21-3 CP-DC 
Instrument Lamp Bulb........................................3 CP-SC
Fuse (Thermal Type) -- On Light Switch............30 Amperes

Lubrication Capacities
Engine Crankcase -- oil filter empty (quarts)..5 US / 4 1/4 Imp.
Transmission and Transfer Case (pints)..........6 1/2 US / 5 1/2 Imp.
Differential - Front Axle (pints)......................2 1/2 US / 2 Imp.
Differential - Rear Axle (pints).......................2 3/4 US / 2 1/4 Imp.
Oil Bath Air Cleaners (pints)..........................1 1/4 US / 1 Imp.
Brake System Fluid (pints).............................3/4 US / 5/8 Imp.

Location of Serial Number:  Plate on outside left frame side rail at the front and on instrument panel.
Location of Engine Number: Stamped on water pump boss.

 x
x
    79.37 mm.
  111.12 mm.
2199.53 cc.
 
 
 
 
 

  203.20 cm.
  122.55 cm.
  149.86 cm.
  176.21 cm.
  133.03 cm.
  311.78 cm.
    21.90 cm.
  362.88 kg.
  961.63 kg.
1006.99 kg.
1369.87 kg.

  544.32 kg.
    39.74 litres
    10.41 litres
 
 
 
 

No. 63
No. 1158
No. 63
 
 

4.73 litres
3.7 litres
1.18 litres
1.30 litres
591.40 cc.
354.84 cc.

Lubrication Specifications


Chassis Lubrication
Transmission and Transfer Case
Differentials -- Front and Rear
Steering Gear
Wheel Bearings
Universal Joints (Front Axle Shaft)
Universal Joints (Propeller Shaft)
Power Take-Off Housing
Air Cleaner
Governor
Engine		 Type Lube.
Chassis Lube.
Mineral Gear Oil
Hypoid Oil
Steering Gear Lube.
Wheel Bearing Lube.
Universal Joint Lube.
Chassis Lube.
Mineral Gear Oil
Engine Oil
Engine Oil
Engine Oil		 Winter
No. 0
SAE 80
SAE 90
SAE 140
No. 2
No. 0
No. 0
SAE 80
Same Grade as used in engine
Same Grade as used in engine
See Below		 Summer
No. 1
SAE 90
SAE 90
SAE 140
No. 2
No. 1
No. 1
SAE 90
Same Grade as used in engine
Same Grade as used in engine
See Below

Above 90º F.................SAE 30
Not Lower than 32º F...SAE 20 or 30
As Low as +10º F........SAE 20 W
As Low as -10º F.........SAE 10 W
To temperatures below -10º F, use SAE 10 W plus 10% kerosene.
 
 

 

Valve and Ignition Timing

X
X
Inlet opens 9 degrees before top centre
Inlet closes 50 degrees after bottom centre
Exhaust opens 47 degrees before bottom centre
Exhaust closes 12 degrees after top centre
Spark Setting

Spark set top centre with automatic spark controls at rest, when using low octane fuel.

Firing Order
Tappet setting for valve timing
Number of flywheel teeth

 Piston Measurements
From Top Centre
.039"   (9.91 mm.)
3.772" (95.81 mm.)
3.799" (96.49 mm.)
.054"   (0.14 mm.)
"IGN" 5º BTC
X
X
X
X
1-3-4-2
.020"   (0.51 mm.)
97

* All specifications taken from Your Operation and Care Manual Universal Jeep Model CJ-2A (second edition) copyright 1946 by Willys-Overland Motors, Inc.

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