Nissan CA18ET

Nissan CA18ETThe 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 codeCA18ET
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline
Production1984-1990
Displacement1.8 L, 1,809 cm3 (110.39 cu in)
Fuel systemMultiport Fuel Injection
Power adderTurbocharger Garrett T2
Max. horsepower133 HP (99 kW; 135 PS) at 6,000 rpm
Max. torque183 Nm (18.6 kg⋅m; 135.0 ft-lb) at 3,600 rpm
Firing order1-3-4-2
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 alloyCast 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:Top0.040-0.073 mm (0.0016-0.0029 in)
Second0.030-0.063 mm (0.0012-0.0025 in)
Piston ring end gap:Top0.25-0.42 mm (0.0098-0.0165 in)
Second0.15-0.31 mm (0.0059-0.0122 in)
Oil0.20-0.78 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:INTAKE41.0-41.2 mm (1.614-1.622 in)
EXHAUST35.0-35.2 mm (1.378-1.386 in)
Valve length:INTAKE105.48-105.9 mm (4.1527-4.1693 in)
EXHAUST106.49-106.91 mm (4.1926-4.2090 in)
Valve stem diameter:INTAKE6.965-6.980 mm (0.2742-0.2748 in)
EXHAUST6.945-6.960 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:INTAKE9.0 mm (0.354 in)
EXHAUST10.0 mm (0.394 in)
Camshaft cam height:INTAKE38.240-38.290 mm (1.5055-1.5075 in)
EXHAUST38.834-38.884 mm (1.5289-1.5309 in)
Outer camshaft journal diameter:№1-445.935-45.955 mm (1.8085-1.8092 in)
№545.915-45.935 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 nuts32-36 Nm; 3.3-3.7 kg·m; 24-27 ft·lb
Flywheel bolt98-108 Nm; 10.0-11.0 kg·m; 72-80 ft·lb
Main bearing cap bolt44-54 Nm; 4.5-5.5 kg·m; 33-40 ft·lb
Camshaft sprocket bolt78-88 Nm; 8.0-9.0 kg·m; 57-65 ft·lb
Oil pan5-7 Nm; 0.5-0.7 kg·m; 3.6-5.1 ft·lb
Oil pump12-16 Nm; 1.2-1.6 kg·m; 9-12 ft·lb
Oil pan drain plug29-39 Nm; 3.0-4.0 kg·m; 22-29 ft·lb
Rocker shaft18-22 Nm; 1.8-2.2 kg·m; 13-16 ft·lb
Rocker arm nut18-22 Nm; 1.8-2.2 kg·m; 13-16 ft·lb
Camshaft locate plate78-88 Nm; 8.0-9.0 kg·m; 58-65 ft·lb
Exhaust manifold20-29 Nm; 2.0-3.0 kg·m; 14-22 ft·lb
Exhaust outlet to turbocharger20-29 Nm; 2.0-3.0 kg·m; 14-22 ft·lb
Fuel injector2.5-3.2 Nm; 0.25-0.32 kg·m; 1.8-2.4 ft·lb
Crank pulley damper bolt123-132 Nm; 12.6-13.5 kg·m; 90-98 ft·lb

Maintenance data

Valve clearance (HOT)
Intake valve0.30 mm (0.012 in)
Intake valve0.30 mm (0.012 in)
Valve clearance (COLD)
Intake valve0.21 mm (0.008 in)
Exhaust valve0.23 mm (0.009 in)
Compression pressure
Standard12.0 kg/cm2 (11.77 bar, 171 psi) / 350 rpm
Minimun9.0 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 APISF/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 timing15° B.T.D.C.
Spark plugBCPR6ES-11 (NGK)
Spark plug gap1.0-1.1 mm (0.039-0.043 in)
Spark plug tightening torque20-29 Nm; 2.0-3.0 kg·m; 14-22 ft·lb

Vehicle applications

ModelYears Produced
Nissan 200SX Turbo1984-1988
Nissan Bluebird U11 Turbo1984-1986
Nissan Bluebird U11 SSS-X1983-1985
Nissan Silvia1986-1988
Nissan Bluebird T12/T72 Turbo1986-1990
Nissan Auster 1.8Xt1985-1990
Nissan Silvia S12Mid 1980s
Reliant Scimitar SS1 1800Ti1986-1990
Reliant Scimitar SST 1800Ti1990-1992
Nissan Van C22 (Vanette)
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