The Nissan SR18Di motor uses some cast-iron block, aluminum head with the dual overhead camshaft (DOHC) and Single Point Fuel Injection system.
The SR18Di engine bore is 82.5 mm, stroke is 86 mm and the compression ratio rating is 9.5:1.
With a 9.5:1 static compression ratio, the factory quoted power and torque outputs are 110 PS (81 kW; 108 hp) at 6500 rpm and 150 Nm (110 lbf·ft) at 4000 rpm.
This engine was used in Nissan medium models for Japan domestic market and some UK models.
The breakdown of the engine code is as follows:
- SR – Engine Family
- 18 – 1.8 Liter Displacement
- D – DOHC (Dual Overhead Camshafts)
- i – Throttle Body Fuel Injection
|Layout||Four stroke, Inline-4 (Straight-4)|
|Displacement||1.8L, 1838 cc (112.1 cu in)|
|Fuel system||Single Point Fuel Injection|
|Power output||81 kW (110 HP) at 6,400 rpm|
|Torque output||156 Nm (115 lb·ft) at 4,000 rpm|
|Dimensions (L x H x W):||–|
|Weight||330 lbs (150 kg)|
The cylinder block, which is of a monoblock special casting structure, adopts a five-bearing-support system for quietness and higher durability. Cylinder bore was 82.5 mm (3.25 in) and stroke was 86 mm (3.4 in). The 1.8-litre SR18Di employs the same block as the SR18DE with Multi-Point Fuel Injection System.
|Cylinder block alloy||Cast iron|
|Cylinder bore:||82.5 mm (3.25 in)|
|Piston stroke:||86 mm (3.4 in)|
|Bore Pitch (Bore Spacing):||97.0 mm (3.8 in)|
|Con rod length:||–|
|Crankshaft journal diameter:||55.0 mm (2.165 in)|
|Crankpin diameter:||48.0 mm (1.889 in)|
The cylinder head was made of light and strong aluminum alloy with good cooling efficiency. Two camshafts were driven by a single row chain driven by the crankshaft. Intake valves are 32 mm in diameter, and the exhaust valves are 28 mm.
|Cylinder head alloy||Aluminum|
|Valve Arrangement:||DOHC, chain drive|
|Valves:||16 (4 valves per cylinder)|
|Intake valves diameter:||32.0 mm (1.259 in)|
|Exhaust valves diameter:||28.0 mm (1.102 in)|
Problems and malfunctions
This engine is as reliable and durable as SR20DE. It does not have any serious problems or faults and will serve more than 250,000 miles of mileage (400,000 km).
|Oil consumption , L/1000 km (qt. per miles)||up to 0.5 (1 qt. per 1200 miles)|
|Recommended engine oil||
|Engine oil capacity, L (qt.)||3.4 (3.6)|
|Oil change interval, km (miles)||5,000-10,000 (3,000-6,000)|
|Spark plug||Champion RC9MCC|
|Spark Plug Wire||Champion LS-34|
|Nissan Avenir W10||1990-1992|
|Nissan Bluebird U12||1989-1991|
|Nissan Primera P10||1990–1993|
|Nissan Presea R10||1990–1992|