Nissan A10

Nissan A10 engineThe Nissan A10 is an inline 1.0 liter (988 cc) four-cylinder, four-stroke cycle gasoline engine from Nissan A-family, released in September 1966 for Datsun 1000 (1967 model year).

The A10 engine produced 55 HP (41 kW, 56 PS) of horsepower at 6,000 rpm and 75.5 Nm (56 ft-lb) of torque at 4,000 rpm (on Datsun Sunny B10, JDM) and 61 HP (45.5 kW, 62 PS) of horsepower on Datsun 1000. Bore and stroke were 73.0 mm and 59.0 mm, respectively. Compression ratio rating was 8.5:1.

In September 1969, the Datsun 1000 Coupe was introduced. This model was equipped with an updated version of the A10 with a new carburetor and increased to 9.0:1 compression ratio. This new motor produced 66.6 PS (66 HP, 49 kW) of horsepower. Later versions of A10 engine produced 58 HP (43 kW, 58 PS). The A10 was used in the Nissan Sunny B10 (Datsun 1000) and B20 from 1967 to 1970, Nissan Cherry E10 (Datsun 100A) from 1971 to 1976.

The breakdown of the engine code is as follows:

  • A – Engine Family
  • 10 – 1.0 Liter Displacement

General information

Engine Specifications
Engine code A10
Layout Four stroke, Inline-4 (Straight-4)
Fuel type Gasoline (petrol)
Production 1966-1976
Displacement 1.0L, 988 cc (60.3 cu in)
Fuel system Carburetor type
Power adder None
Max power output 62.8 PS (62 HP, 46 kW) at 6,000 rpm
Max torque output 83 Nm (8.5 kg·m, 61.5 lb·ft) at 4000 rpm
Firing order 1-3-4-2
Dimensions (L x W x H): 547 x 553 x 590 mm (21.5 x 21.8 x 23.2 in)
Weight 91.5 kg (210.5 kg)

Cylinder block

The A10 has a cast-iron cylinder block utilizes a three bearing supported system. The cylinder block is provided with a baffle plate and a steel net to reduce oil consumption. The cylinder bore is 73.0 mm (2.87 in) and stroke is 59.0 mm (2.32 in).

The crankshaft of the A10 motor is supported by three main bearings. These main bearings are lubricated through oil holes which intersect the main oil gallery in parallel with cylinder bores. The A10 uses flat head pistons. The piston pin is connected to the piston by a full floating fit and to the connecting rod by a press fit.

Full pressure lubrication is directed to the connecting rod through drilled oil passages from the adjacent main bearing journal so that oil is supplied to give maximum lubrication just before a full bearing load is applied.

Cylinder block
Cylinder block alloy Cast iron
Compression ratio: 8.5:1
Cylinder bore: 73.0 mm (2.87 in)
Piston stroke: 59.0 mm (2.32 in)
Number of piston rings (compression / oil): 2 / 1
Number of main bearings: 3
Cylinder inner diameter (standard): 73.000-73.050 mm (2.874-2.876 in)
Piston skirt diameter (standard): 72.987-73.037 mm (2.8735-2.8755 in)
Piston pin outer diameter: 17.447-17.452 mm (0.6869-0.6871 in)
Piston ring side clearance: Top 0.040-0.070 mm (0.0016- 0.0028 in)
Second 0.040-0.070 mm (0.0016-0.0028 in)
Oil 0.040-0.080 mm (0.0016-0.0032 in)
Piston ring end gap: Top 0.20-0.35 mm (0.0079-0.0138 in)
Second 0.20-0.35 mm (0.0079-0.0138 in)
Oil 0.30-0.90 mm (0.0118-0.0354 in)
Crankshaft journal diameter: 49.951-49.974 (1.9666-1.9675)
Crankpin diameter: 44.961-44.974 (1.7701-1.7706)

Cylinder head

The valve system has a push rod type rocker arm which uses the single type valve springs.

The camshaft is supported by five camshaft bearings. Camshaft bearings are lubricated through oil holes which intersect the main oil gallery of the cylinder block. Concentric passages are drilled in the front and rear parts of the camshaft for supplying oil to each cam lobe through an oil hole drilled in the base circle of each lobe. A lubricant is supplied to the front oil gallery from the second camshaft bearing. From the center camshaft bearing, a lubricant is supplied to the valve rocker shaft through the center rocker shaft bracket.

The camshaft is driven with a double row roller chain from the crankshaft. The tension of the chain is controlled by the chain tensioner which is operated with spring and oil pressure. The rubber shoe type tensioner insulates vibration of the chain and controls the tension of the chain.

The intake manifold has two openings: one is located on the primary side and the other on the secondary side.

The exhaust manifold has a heat control valve which assures stable and smooth engine running after starting in cold season. The manifold is connected to the exhaust pipe by flangers, which completely eliminate exhaust leaking.

Cylinder head
Valve Arrangement: OHV, chain drive
Valves: 8 (2 valves per cylinder)
Valve timing: INTAKE Open: 12° B.T.D.C.
Close: 48° A.T.D.C.
EXHAUST Open: 50° B.T.D.C.
Close: 10° A.T.D.C.
Valve head diameter: INTAKE 37.0-37.2 mm (1.457-1.465 in)
EXHAUST 30.0-30.2 mm (1.181-1.189 in)
Valve length: INTAKE 102.35-102.65 mm (4.030-4.041 in)
Valve stem diameter: INTAKE 7.970-7.985 mm (0.3138-0.3144 in)
EXHAUST 7.945-7.960 mm (0.3128-0.3134 in)
Valve spring free length: 46.5 mm (1.831)
Cam height: INTAKE 36.200-36.250 mm (1.4252-1.4272 in)
EXHAUST 36.930-36.980 mm (1.4539-1.4559 in)
Outer camshaft journal diameter: №1 43.783-43.796 mm (1.7237-1.7242 in)
№2 42.283-43.296 mm (1.6647-1.7046 in)
№3 42.783-42.796 mm (1.6844-1.6849 in)
№4 42.283-42.296 mm (1.6647-1.6652 in)
№5 41.208-41.221 mm (1.6224-1.6229 in)

Maintenance data

Valve clearance (Cold)
Intake valve 0.25 mm (0.0098 in)
Exhaust valve
Valve clearance (Hot)
Intake valve 0.35 mm (0.0138 in)
Exhaust valve
Compression pressure
Standard 12.7 kg/cm2 (181 psi) / 350 rpm
Minimun 10.0 kg/cm2 (142 psi) / 350 rpm
Oil system
Oil consumption , L/1000 km (qt. per miles) up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil 5W-30, 5W-40, 10W-30, 10W-40
Engine oil capacity (Refill capacity) Max.level 3.2 l (3.4 qt.)
Min.level 2.2 l (2.4 qt.)
Oil change interval, km (miles) 5,000-10,000 (3,000-6,000)
Ignition system
Ignition coil Hitachi C14-51
Distributor Hitachi D412-53
Ignition timig B.T.D.C./rpm 8°/600-700
Spark plug Hitachi
Spark plug thread 14 mm (0.55 in)
Spark plug gap 0.7 – 0.8 mm (0.027 – 0.031 in)
Type Hitachi DCG 286-3
Throttle valve bore 26 mm (1.02 in)
Venturi size 20 x 7 mm (0.78 x 0.27 in)
Main jet #95
Slow jet #80
Power jet #60
Type Hitachi LT125-01
Voltage regulator TL1Z-10A
Type Hitachi S114-87

Tightening torque specs

Tightening torque specs
Cylinder head bolt 60-65 Nm; 6.0-6.5 kg·m; 43-47 ft·lb
Rocker shaft bracket bolt 20-25 Nm; 2.0-2.5 kg·m; 14-18 ft·lb
Connecting rod big end nut 30-36 Nm; 3.0-3.6 kg·m; 22-26 ft·lb
Flywheel bolt 56-60 Nm; 5.6-6.0 kg·m; 41-43 ft·lb
Main bearing cap bolt 40-48 Nm; 4.0-4.8 kg·m; 29-35 ft·lb
Oil pump bolt 9-14 Nm; 0.9-1.4 kg·m; 6.5-10 ft·lb
Oil pan drain plug 20-30 Nm; 2.0-3.0 kg·m; 14-22 ft·lb
Locating plate bolt 5-8 Nm; 0.5-0.8 kg·m; 3.6-5.8 ft·lb
Manifold nut 9-14 Nm; 0.9-1.4 kg·m; 6.5-10 ft·lb
Fuel pump nut 9-14 Nm; 0.9-1.4 kg·m; 6.5-10 ft·lb
Crank pulley bolt 150-200 Nm; 15-20 kg·m; 108-145 ft·lb
Engine mounting bolt 19-25 Nm; 1.9-2.5 kg·m; 14-18 ft·lb
Water pump bolt 9-14 Nm; 0.9-1.4 kg·m; 6.5-10 ft·lb
Front cover bolt 5-7 Nm; 0.5-0.7 kg·m; 3.6-5.1 ft·lb

Vehicle applications

Model Years Produced
Nissan Sunny B10, B20 1966–1969
Datsun 1000 1967–1970
Nissan Cherry (E10) 1970–1977
Datsun 100A 1970–1977
Datsun 100A F-II 1976-1978
Nissan Pulsar (BN10)
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