The Nissan CA18i is a 1.8 L (1,809 cc, 110.4 cu·in) natural aspirated four-stroke water-cooled internal combustion gasoline engine, manufactured by Nissan Motor Corporation from 1985 to 1993.
The cylinder bore and piston stroke are 83.0 mm (3.268 in) and 83.6 mm (3.291 in), respectively. The compression ratio rating is 8.8:1.
The CA18i engine produced from 88 PS (65 KW; 87 HP) at 5,200 rpm to 105 PS (77 KW; 103 HP) at 5,600 rpm of maximum horsepower and 142 Nm (14.5 kg·m; 104.8 ft·lb) at 3,200 rpm or 160 Nm (16.32 kg·m; 118.08 ft·lb) at 2,800 rpm of peak torque.
The Nissan CA18i features:
- Cast-iron cylinder block
- Aluminum cylinder head
- SOHC design with four valves per cylinder
- Throttle-body fuel injection SPi (ECCS)
- Pressurized lubrication system
General information
| Engine Specifications | |
| Engine model | CA18i |
| Engine type | 4-stroke, DOHC, vertical |
| Displacement | 1.8 L, 1,809 cm3, (110.4 cu·in) |
| Max. horsepower | 88 PS (65 KW; 87 HP) at 5,200 rpm 91 PS (67 KW; 90 HP) at 5,200 rpm 105 PS (77 KW; 103 HP) at 5,600 rpm |
| Max. torque | 142 Nm (14.5 kg·m; 104.8 ft·lb) at 3,200 rpm 160 Nm (16.32 kg·m; 118.08 ft·lb) at 2,800 rpm |
| Cooling system | Liquid |
| Lubricating system | Pressurized lubrication |
| Fuel system | Throttle-body fuel injection |
| Starting system | Starter motor |
| Charging system | Alternator |
| Firing order: | 1-3-4-2 |
Cylinder Block and Head
| Cylinder block | |
| Cylinder block alloy: | Cast-iron |
| Compression ratio: | 8.8:1 |
| Cylinder bore: | 83.0 mm (3.27 in) |
| Piston stroke: | 83.6 mm (3.29 in) |
| Cylinder internal diameter (standard): | 83.000-83.050 mm (3.2677-3.2697 in) |
| Piston skirt outer diameter (standard): | 82.975-83.025 mm (3.2667-3.2687 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Piston pin diameter: | 19.995-20.000 mm (0.7872-0.7874 in) |
| Side clearance (Top): | 0.040-0.073 mm (0.0016-0.0029 in) |
| Side clearance (Second): | 0.030-0.063 mm (0.0012-0.0025 in) |
| Side clearance (Oil): | 0.025-0.085 mm (0.0010-0.0033 in) |
| Ring end gap (Top): | 0.220-0.390 mm (0.0087-0.0154 in) |
| Ring end gap (Second): | 0.190-0.450 mm (0.0075-0.0177 in) |
| Ring end gap (Oil): | 0.200-0.760 mm (0.0079-0.0299 in) |
| Number of main bearings: | 5 |
| Crankshaft main journal diameter: | 52.951-52.964 mm (2.0847-2.0852 in) |
| Crankpin journal diameter: | 44.961-44.974 mm (1.7701-1.7706 in) |
| Cylinder head | |
| Cylinder head alloy: | Aluminium |
| Valve arrangement: | SOHC |
| Valves: | 2,(8 valves in total) |
Service Data
| Compression pressure | |
| Standard: | 1.236 kPA (12.6 kg/cm2; 179 psi) |
| Minimum: | 1,040 kPA (10.6 kg/cm2; 151 psi) |
| Compression differential limit between cylinders: | 98 kPA (1.0 kg/cm2; 14 psi) |
| Valve clearance | |
| Intake valve clearance: | 0.30 mm (0.0120 in) |
| Exhaust valve clearance: | 0.30 mm (0.0120 in) |
| Oil system | |
| Lubrication system: | Pressurized lubrication |
| Oil type: | API SG |
| Recommended oil: | SAE 5W-30,10W-30, 10W-40 |
| Oil capacity: | With oil filter: 3.6 liters (3.8 US.qts, 3.17 Imp. qts) Without oil filter: 3.2 liters (3.38 US.qts, 2.82 Imp. qts) |
| Oil pressure: | 98 kPA (1.0 kg/cm2; 14.0 psi) at Idle speed 390 kPA (4.0 kg/cm2; 57.0 psi) at 4,000 rpm |
| Fuel system | |
| Type: | Throttle-body fuel injection – SPi (ECCS) |
| Ignition system | |
| Ignition timing: | 13° B.T.D.C. / 700 rpm |
| Spark plug: | NGK: BCPR5ES-11 |
| Spark plug gap: | 1.0-1.1 mm (0.0394-0.0433 in) |
| Spark plug torque: | 25 N·m (2.5 kg·m, 18.4 ft·lb) |
Applications
| Model | Years Produced |
| Nissan Stanza (T12) | 1986-1990 |
| Nissan Auster (T12) | 1985-1990 |
| Nissan Bluebird (RNU12) | 1987-1989 |
| Nissan Laurel (C33) | 1989-1992 |
| Nissan Skyline (R32) | 1989-1993 |
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