The Nissan CA18i is a 1.8 liter (1,809 cc, 110.39 cu in) straight-4, four-stroke cycle gasoline engine from Nissan CA-family. The CA18i motor was produced from 1988 through 1993.
The Nissan CA18i engine has SOHC (single overhead camshaft) design with two valves per cylinder (8 valves in total), cast-iron block and an aluminum cylinder head; fully balanced five-bearing crankshaft. The engine is equipped with Single-point electronical fuel injection system.
The CA18i motor has an 83.0 mm (3.268 in) cylinder bore and 83.6 mm (3.291 in) piston stroke with a compression ratio rating of 8.8:1. It produced from 88 PS (65 KW; 87 HP) at 5,200 rpm to 105 PS (77 KW; 103 HP) at 5,600 rpm of 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 torque.
The breakdown of the engine code is as follows:
- CA – Engine Family
- 18 – 1.8 Liter Displacement
- – – SOHC (Single Overhead Camshaft)
- i – Single-point Electronical Injection
General information
| Engine Specifications | |
| Engine code | CA18i |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline |
| Production | 1985-1993 |
| Displacement | 1.8 L, 1,809 cm3 (110.39 cu in) |
| Fuel system | Single-point Electronical Injection |
| Power adder | None |
| 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 |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | – |
Cylinder block
The Nissan CA18i motor has a cast-iron cylinder block. The cylinder block, a monoblock special casting structure, employs a five-bearing-support system. The CA18i engine cylinder bore is 83.0 mm (3.268 in) and the piston stroke is 83.6 mm (3.291 in), compression ratio rating is 8.8:1.
Each piston is fitted with two compression rings and a single oil ring. The cylinder block height is 204.8 mm (8.06 in).
| Cylinder block | ||
| Cylinder block alloy | Cast iron | |
| Compression ratio: | 8.8:1 | |
| Cylinder bore: | 83.0 mm (3.268 in) | |
| Piston stroke: | 83.6 mm (3.291 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter (standard): | 83.000-83.050 mm (3.2677-3.2697 in) | |
| Piston skirt diameter (standard): | 82.975-83.025 mm (3.2667-3.2687 in) | |
| Piston pin outer diameter: | 19.995-20.000 mm (0.7872-0.7874 in) | |
| Piston ring side clearance: | Top | 0.040-0.073 mm (0.0016-0.0029 in) |
| Second | 0.030-0.063 mm (0.0012-0.0025 in) | |
| Oil | 0.025-0.085 mm (0.0010-0.0033 in) | |
| Piston ring end gap: | Top | 0.22-0.39 mm (0.0087-0.0154 in) |
| Second | 0.19-0.45 mm (0.0075-0.0177 in) | |
| Oil | 0.20-0.76 mm (0.0079-0.0299 in) | |
| Connecting rod center distance: | 132.95-133.05 mm (5.2342-5.2382 in) | |
| Crankshaft journal diameter: | 52.951-52.964 mm (2.0847-2.0852 in) | |
| Crankpin diameter: | 44.961-44.974 mm (1.7701-1.7706 in) | |
| Crankshaft center distance: | 41.77-41.83 mm (1.6445-1.6468 in) | |
Cylinder head
| Cylinder head | ||
| Valve Arrangement: | SOHC | |
| Valves: | 8 (2 valves per cylinder) | |
| Intake/Exhaust duration: | – | |
Maintenance data
| Valve clearance | |
| Intake valve clearance: | 0.30 mm (0.0120 in) |
| Exhaust valve clearance: | 0.30 mm (0.0120 in) |
| Compression pressure | |
| Standard | 12.2 kg/cm2 (173 psi) / 350 rpm |
| Minimun | 10.2 kg/cm2 (145 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 | 10W-30 |
| Oil type API | SE, SF, SG, SD |
| Engine oil capacity (Refill 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) |
| Ignition system | |
| Spark plug | NGK BCPR5ES-11 |
| Spark plug gap | 1.1 mm (0.04 in) |
Vehicle 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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