The Nissan A12A is a 1.24 l (1,237 cc, 75.5 cu-in) four-cylinder four-stroke gasoline engine from Nissan A-family. The engine was manufactured by Nissan Motor Company from 1977 to 1982.
The A12A motor uses a lightweight cast-iron block and an aluminum cylinder head, with overhead valves and a single camshaft. The engine was equipped with a two-barrel carburetor. Bore and stroke are 75.0 mm (2.95 in) and 70.0 mm (2.76 in), respectively. The A12A produced 69.0 PS (51.0 KW; 68.0 HP) at 6,000 rpm of horsepower.
The breakdown of the engine code is as follows:
- A – Engine Family
- 12 – 1.2 Liter Displacement
- A
General information
| Engine Specifications | |
| Engine code | A12A |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline (petrol) |
| Production | 1977-1982 |
| Displacement | 1.2 L, 1,237 cc (75.5 cu in) |
| Fuel system | Carburetor type |
| Power adder | None |
| Power output | 69.0 PS (51.0 KW; 68.0 HP) at 6,000 rpm |
| Torque output | – |
| Firing order | 1-3-4-2 |
| Dimensions (L x W x H): | – |
| Weight | – |
Cylinder block
The A12A has a cast-iron cylinder block utilizes a five-bearing supported system. The cylinder bore is 75.0 mm (2.95 in) and the stroke is 70.0 mm (2.76 in). The A12A engine has two compression and a single oil control ring.
| Cylinder block | ||
| Cylinder block alloy | Cast iron | |
| Compression ratio: | – | |
| Cylinder bore: | 75.0 mm (2.95 in) | |
| Piston stroke: | 70.0 mm (2.76 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter (standard): | 75.000-75.050 mm (2.9527-2.9547 in) | |
| Piston skirt diameter (standard): | 74.967-75.017 mm (2.9514-2.9534 in) | |
| Connecting rod center distance: | 121.5 mm (4.78 in) | |
Cylinder head
| Cylinder head | ||
| Valve Arrangement: | OHV, chain drive | |
| Valves: | 8 (2 valves per cylinder) | |
Maintenance data
| Cylinder compression | |
| Standard | 13.5 kg/m2 (192 psi) / 350 rpm |
| Minimun | 12.5 kg/m2 (178 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) | With oil filter 3.3 l (3.5 qt.) Without oil filter 2.8 l (3.0 qt.) |
| Oil change interval, km (miles) | 5,000-10,000 (3,000-6,000) |
| Ignition system | |
| Ignition coil | NGK: BP5ES |
| Spark plug gap | 0.8 – 0.9 mm (0.031 – 0.035 in) |
Vehicle applications
| Model | Years Produced |
| Datsun Sunny (B310) | 1977–1980 |
| Datsun 210 (USA and Canada version of Sunny B310) | 1979–1982 |
| Nissan Cherry (F10, F-II) | 1974–1979 |
| Datsun Cherry (N10) | 1978–1982 |
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