Honda1990–1991Technical specifications

Civic CRX 1.6 DOHC: Technical specifications

Workshop data for the 1.6-litre petrol (engine code B16A1). Covers engine, fluids, brakes, service, torques and air conditioning: the figures to check before a job or a parts order.

Common faults & fixes

Summary

Match the engine code (B16A1) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Honda
Model: Civic CRX
Years: 1990–1991
Fuel: Petrol
Engine code: B16A1

Performance & efficiency

Power: 110 kW (150 hp)
Engine size: 1,595 cc
Cylinders: 4 · DOHC
Compression ratio: 10.2:1
Fuel system: Honda

Fluids & capacities

Engine oil (with the filter): 4.0 litres

All 122 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/DOHC
Capacity (Fiscal) cc	1595
Compression ratio :1	10,2
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Type	PGM-FI
Ignition system Description	Map-i
Trigger location	Distributor
Fuel system Make	Honda
Fuel system Type	PGM-FI
Fuel system Description	MFI-s
Air metering Type	MAP
Combined ignition and fuel ECM	Yes
Diagnostic socket	Yes

Ignition system

Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	0,63-0,77
Secondary resistance Ohm	9760-14640

Firing order

The firing order for the Honda Civic CRX 1.6 DOHC (1990–1991) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances for the Honda Civic CRX 1.6 DOHC (1990–1991) are 0,15-0,19 mm inlet and 0,17-0,21 mm exhaust, measured cold.

Valve clearance - INLET mm	0,15-0,19 cold
Valve clearance - EXHAUST mm	0,17-0,21 cold

Engine oil & fluids

Engine oil

The Honda Civic CRX 1.6 DOHC (1990–1991) takes 4.0 litres of engine oil with the filter.

See the reference table for the complete engine oil entries and their conditions.

Manual gearbox

The manual gearbox has a listed capacity of 2.1 litres.

See the reference table for the complete manual gearbox entries and their conditions.

Coolant

The listed total cooling-system capacity is 4.7 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	➞0°C
Engine oil grade SAE	5W-30
Engine oil classification API/ACEA	SG/A2
Ambient temperature range	-20°C➞35°C
Engine oil grade SAE	10W-30
Engine oil classification API/ACEA	SG/A2
Ambient temperature range	-20°C➞
Engine oil grade SAE	10W-40
Engine oil classification API/ACEA	SG/A2
Ambient temperature range	-15°C➞
Engine oil grade SAE	15W-40, 15W-50
Engine oil classification API/ACEA	SG/A2
Ambient temperature range	-10°C➞
Engine oil grade SAE	20W-40, 20W-50
Engine oil classification API/ACEA	SG/A2
Engine with filter(s) litres	4.0
Other lubricants and capacities
Manual transmission oil grade SAE	10W-30, 10W-40
Manual transmission litres	2.1
Cooling system - total capacity litres	4.7

Brakes & wear limits

Brake disc thickness

Brake discs on the Honda Civic CRX 1.6 DOHC (1990–1991) are replaced at a minimum thickness of 19 mm (ventilated) front and 8 mm rear.

Minimum disc thickness for replacement - ventilated Front	19 mm
Minimum disc thickness for replacement Rear	8 mm

Brake disc and drum dimensions

Disc thickness variation Front	0,015 mm
Disc thickness variation Rear	0,015 mm
Disc runout Front	0,015 mm
Disc runout Rear	0,15 mm
Minimum pad thickness Front	1,6 mm
Minimum pad thickness Rear	1,6 mm
Parking brake travel No. of notches	6-10

Service & electrical

Ignition timing

Basic ignition timing for the Honda Civic CRX 1.6 DOHC (1990–1991) is 15°±2° BTDC at 700 rpm.

Idle speed
Ignition timing - basic BTDC °Engine/rpm	15±2/700

Battery

The Honda Civic CRX 1.6 DOHC (1990–1991) uses a 12 V, 47 Ah battery (reserve capacity 65 minutes).

Battery V/RC(Ah)	12/65 (47)

Spark plugs

The Honda Civic CRX 1.6 DOHC (1990–1991) uses NGK BKR6EN-11 spark plugs with a 1,1 mm electrode gap.

Spark plugs Original equipment	NGK
Spark plug Type	BKR6EN-11
Electrode gap mm	1,1
Spark plugs Make	Autolite
Spark plug Type	APP3923
Electrode gap mm	1,0
Spark plugs Make	Beru
Spark plug Type	14FR-7DUX
Electrode gap mm	1,1
Spark plugs Make	Bosch
Spark plug Type	FR7DCX
Electrode gap mm	1,1
Spark plugs Make	Champion
Spark plug Type	RC7YCC4
Electrode gap mm	1,1
Spark plugs Make	NGK
Spark plug Type	BKR6EN-11
Electrode gap mm	1,1

Tuning and emissions

Idle speed
Tuning conditions	—
View more information	—
Ignition advance checks °Engine/rpm	ECM Controlled
Idle speed rpm	750±50
Fast idle speed - MT/AT rpm	1600-2000
Oil temperature °C	80
CO level at idle speed - tailpipe (Cat) Vol. % CO	0,1 Max Not adjustable
HC level at idle speed ppm	100
CO2 level at idle speed Vol. % CO2	14,5-16
O2 level at idle speed Vol. % O2	0,1-0,5
Increased idle speed for CO test rpm	2300-2700
CO content at increased idle speed Vol. %	0,3
Lambda at increased idle λ	0,97-1,03

Starting and charging

Starter motor Make	Mitsuba
Starter motor Type	1,4 kW
Minimum starting voltage V	12
Maximum cranking amps A	127-155
Alternator Make	Nippon Denso
Alternator output A/V/rpm	70/13,5/3000
Regulated voltage V	13,9-15,1

Service checks and adjustments

Compression pressure bar	9,5-13,0
Oil pressure bar/rpm	3,5/3000
Radiator cap bar	0,75-1,05
Thermostat opens °C	76
Drive belt tension - alternator/PAS/AC mm	8,5-10,5/7-9

Fuel system

System pressure bar	2,4-2,79
Regulated pressure with vacuum bar	1,75-2,14
Crankshaft position (CKP) sensor/engine speed (RPM) sensor Ohm	350-700
Injector Ohm	1,5-2,5
Idle air control (IAC) valve/idle speed control (ISC) actuator Ohm	8,0-15,0

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Honda Civic CRX 1.6 DOHC (1990–1991) are tightened in 2 stages: 30 Nm, then a final 85 Nm.

Cylinder head
Renew bolts	No
Tighten	30 Nm
Tighten	85 Nm

Other engine tightening torques
Cylinder head instructions	—
Oil pump to cylinder block	11 Nm
Sump bolts	1)6 Nm 2)12 Nm
Sump drain bolt	45 Nm
Flywheel/driveplate	105 Nm
Clutch pressure plate	26 Nm
Crankshaft pulley/damper centre bolt	120 Nm
Camshaft sprocket/gear	51 Nm
Camshaft carrier/cap	—
Camshaft carrier caps
Camshaft/rocker cover	10 Nm
Inlet manifold to cylinder head	23 Nm
Exhaust manifold to cylinder head	32 Nm
Spark plugs	18 Nm
Lambda sensor (Oxygen)	45 Nm
Chassis tightening torques
Front hub	185 Nm
Rear hub	185 Nm
Steering track rod end	45 Nm
Brake caliper to carrier Front	50 Nm
Brake caliper/carrier to hub Front	78 Nm
Brake caliper to carrier Rear	23 Nm
Brake caliper/carrier to hub Rear	39 Nm
Back plate to hub Rear	39 Nm
Road wheels	110 Nm

Air conditioning

Air conditioning refrigerant Type	R12
Air conditioning refrigerant quantity grams	900±50
Air conditioning oil quantity cm³	—

Frequently asked questions

What is the firing order of the Honda Civic CRX 1.6 DOHC?

The firing order for the Honda Civic CRX 1.6 DOHC (1990–1991) is 1-3-4-2.

What spark plugs does the Honda Civic CRX 1.6 DOHC use?

The Honda Civic CRX 1.6 DOHC (1990–1991) uses NGK BKR6EN-11 spark plugs with a 1,1 mm electrode gap.

How much oil does the Honda Civic CRX 1.6 DOHC take?

The Honda Civic CRX 1.6 DOHC (1990–1991) takes 4.0 litres of engine oil with the filter. See the reference table for the complete engine oil entries and their conditions.

What are the valve clearances for the Honda Civic CRX 1.6 DOHC?

Valve clearances for the Honda Civic CRX 1.6 DOHC (1990–1991) are 0,15-0,19 mm inlet and 0,17-0,21 mm exhaust, measured cold.

What is the cylinder head torque for the Honda Civic CRX 1.6 DOHC?

The cylinder head bolts on the Honda Civic CRX 1.6 DOHC (1990–1991) are tightened in 2 stages: 30 Nm, then a final 85 Nm.

What is the ignition timing for the Honda Civic CRX 1.6 DOHC?

Basic ignition timing for the Honda Civic CRX 1.6 DOHC (1990–1991) is 15°±2° BTDC at 700 rpm.