The Nissan CA18ET is a turbocharged 1.8 liter (1,809 cc, 110.39 cu in) straight-4, four-stroke cycle gasoline engine from Nissan CA-family. The CA18ET motor was produced from 1984 through 1990.
The Nissan CA18ET engine has SOHC (single overhead camshaft) design with two valves per cylinder, cast-iron block, and an aluminum cylinder head; fully balanced five-bearing crankshaft. The engine is equipped with Multiport Fuel Injection system and single Garrett T2 turbocharger without an intercooler.
The CA18ET motor has an 83.0 mm (3.268 in) cylinder bore and 83.6 mm (3.291 in) piston stroke with a compression ratio of 8.0:1. It produced 133 HP (99 kW; 135 PS) of horsepower at 6,000 rpm and 183 Nm (18.6 kg⋅m; 135.0 ft-lb) of torque at 3,600 rpm.
The breakdown of the engine code is as follows:
- CA – Engine Family
- 18 – 1.8 Liter Displacement
- E – Multi Point Fuel Injection
- T – Turbocharged
General information
| Engine Specifications | |
| Engine code | CA18ET |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline |
| Production | 1984-1990 |
| Displacement | 1.8 L, 1,809 cm3 (110.39 cu in) |
| Fuel system | Multiport Fuel Injection |
| Power adder | Turbocharger Garrett T2 |
| Max. horsepower | 133 HP (99 kW; 135 PS) at 6,000 rpm |
| Max. torque | 183 Nm (18.6 kg⋅m; 135.0 ft-lb) at 3,600 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | – |
Cylinder block
The Nissan CA18ET motor has a cast-iron cylinder block. The cylinder block, a monoblock special casting structure, employs a five-bearing-support system. The CA18ET 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 8.0:1.
The crankshaft is a special steel forging. Fully balanced, it turns out smooth, dependable power at high speed. The pistons are each fitted with two compression rings and a single oil ring. The cylinder block height is 209.8 mm (8.26 in).
| Cylinder block | ||
| Cylinder block alloy | Cast iron | |
| Compression ratio: | 8.0:1 | |
| 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): | 82.965-83.015 mm (3.2663-3.2638 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) | |
| Piston ring end gap: | Top | 0.25-0.42 mm (0.0098-0.0165 in) |
| Second | 0.15-0.31 mm (0.0059-0.0122 in) | |
| Oil | 0.20-0.78 mm (0.0079-0.0229 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
The cylinder head is made of light and strong aluminum alloy with good cooling efficiency. The valve system has a rocker arm that is activated directly by the cam mechanism. The camshaft is driven by a timing belt driven by the crankshaft. Intake valves are 41.0 mm (1.61 in) in diameter and the exhaust valves are 35.0 mm (1.37 in). The intake valve duration is 240°, valve lift is 9.0 mm (0.35 in); the exhaust valve duration is 248°, valve lift is 10.0 mm (0.39 in).
| Cylinder head | ||
| Valve Arrangement: | OHV | |
| Valves: | 8 (2 valves per cylinder) | |
| Intake/Exhaust duration: | 240°/248° | |
| Valve head diameter: | INTAKE | 41.0-41.2 mm (1.614-1.622 in) |
| EXHAUST | 35.0-35.2 mm (1.378-1.386 in) | |
| Valve length: | INTAKE | 105.48-105.9 mm (4.1527-4.1693 in) |
| EXHAUST | 106.49-106.91 mm (4.1926-4.2090 in) | |
| Valve stem diameter: | INTAKE | 6.965-6.980 mm (0.2742-0.2748 in) |
| EXHAUST | 6.945-6.960 mm (0.2734-0.2740 in) | |
| Valve spring free length: | INTAKE |
Outer: 49.98 mm (1.968 in) Inner: 44.10 mm (1.736 in) |
| EXHAUST |
Outer: 49.98 mm (1.968 in) Inner: 44.10 mm (1.736 in) |
|
| Valve lift: | INTAKE | 9.0 mm (0.354 in) |
| EXHAUST | 10.0 mm (0.394 in) | |
| Camshaft cam height: | INTAKE | 38.240-38.290 mm (1.5055-1.5075 in) |
| EXHAUST | 38.834-38.884 mm (1.5289-1.5309 in) | |
| Outer camshaft journal diameter: | №1-4 | 45.935-45.955 mm (1.8085-1.8092 in) |
| №5 | 45.915-45.935 mm (1.8077-1.8085 in) | |
Tightening torque specs
| Tightening torque specs | |
| Cylinder head bolt |
Step 1: 29 Nm; 3.0 kg·m; 22 ft·lb Step 2: 78 Nm; 8.0 kg·m; 58 ft·lb Step 3: Loosen all bolts completely Step 4: 29 Nm; 3.0 kg·m; 22 ft·lb Step 4: 74-83 Nm; 7.5-8.5 kg·m; 54-61 ft·lb |
| Connecting rod bearing nuts | 32-36 Nm; 3.3-3.7 kg·m; 24-27 ft·lb |
| Flywheel bolt | 98-108 Nm; 10.0-11.0 kg·m; 72-80 ft·lb |
| Main bearing cap bolt | 44-54 Nm; 4.5-5.5 kg·m; 33-40 ft·lb |
| Camshaft sprocket bolt | 78-88 Nm; 8.0-9.0 kg·m; 57-65 ft·lb |
| Oil pan | 5-7 Nm; 0.5-0.7 kg·m; 3.6-5.1 ft·lb |
| Oil pump | 12-16 Nm; 1.2-1.6 kg·m; 9-12 ft·lb |
| Oil pan drain plug | 29-39 Nm; 3.0-4.0 kg·m; 22-29 ft·lb |
| Rocker shaft | 18-22 Nm; 1.8-2.2 kg·m; 13-16 ft·lb |
| Rocker arm nut | 18-22 Nm; 1.8-2.2 kg·m; 13-16 ft·lb |
| Camshaft locate plate | 78-88 Nm; 8.0-9.0 kg·m; 58-65 ft·lb |
| Exhaust manifold | 20-29 Nm; 2.0-3.0 kg·m; 14-22 ft·lb |
| Exhaust outlet to turbocharger | 20-29 Nm; 2.0-3.0 kg·m; 14-22 ft·lb |
| Fuel injector | 2.5-3.2 Nm; 0.25-0.32 kg·m; 1.8-2.4 ft·lb |
| Crank pulley damper bolt | 123-132 Nm; 12.6-13.5 kg·m; 90-98 ft·lb |
Maintenance data
| Valve clearance (HOT) | |
| Intake valve | 0.30 mm (0.012 in) |
| Intake valve | 0.30 mm (0.012 in) |
| Valve clearance (COLD) | |
| Intake valve | 0.21 mm (0.008 in) |
| Exhaust valve | 0.23 mm (0.009 in) |
| Compression pressure | |
| Standard | 12.0 kg/cm2 (11.77 bar, 171 psi) / 350 rpm |
| Minimun | 9.0 kg/cm2 (8.83 bar, 128 psi) / 250 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 20W-40 20W-50 |
| Oil type API | SF/CC or SF/CD |
| Engine oil capacity (Refill capacity) |
With oil filter: 3.6 l (3-7/8 US qt, 3-1/8 Imp qt) Without oil filter: 3.2 l (3-3/8 US qt, 2-7/8 Imp qt) |
| Oil change interval, km (miles) | 12,000 (7,500) |
| Oil pressure, kg/cm2 (psi) | 3.0 (43) at 2,000 rpm |
| Ignition system | |
| Ignition timing | 15° B.T.D.C. |
| Spark plug | BCPR6ES-11 (NGK) |
| Spark plug gap | 1.0-1.1 mm (0.039-0.043 in) |
| Spark plug tightening torque | 20-29 Nm; 2.0-3.0 kg·m; 14-22 ft·lb |
Vehicle applications
| Model | Years Produced |
| Nissan 200SX Turbo | 1984-1988 |
| Nissan Bluebird U11 Turbo | 1984-1986 |
| Nissan Bluebird U11 SSS-X | 1983-1985 |
| Nissan Silvia | 1986-1988 |
| Nissan Bluebird T12/T72 Turbo | 1986-1990 |
| Nissan Auster 1.8Xt | 1985-1990 |
| Nissan Silvia S12 | Mid 1980s |
| Reliant Scimitar SS1 1800Ti | 1986-1990 |
| Reliant Scimitar SST 1800Ti | 1990-1992 |
| Nissan Van C22 (Vanette) | – |
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