Mazda1987–1989Technical specifications

323 1.6 Turbo: Technical specifications

Workshop data for the 1.6-litre petrol (engine code B6 DOHC). Covers engine, fluids, brakes, service and torques: the figures to check before a job or a parts order.

Summary

Match the engine code (B6 DOHC) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make
Mazda
Model
323
Years
1987–1989
Fuel
Petrol
Engine code
B6 DOHC

Performance & efficiency

Power
110 kW (150 hp)
Engine size
1,597 cc
Cylinders
4 · DOHC
Compression ratio
7.9:1
Fuel system
Mazda

Fluids & capacities

Engine oil (with the filter)
3.5 litres
All 125 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type4/DOHC
Capacity (Fiscal) cc1597 (1585)
Compression ratio :17,9
Suitable for unleaded petrolNo
Minimum octane rating RON98
Ignition system TypeHEI
Ignition system DescriptionTrans-i
Trigger locationDistributor
Fuel system MakeMazda
Fuel system TypeEGI
Fuel system DescriptionMFI-i
Air metering TypeFlow
Combined ignition and fuel ECMNo
Diagnostic socketYes

Ignition system

Ignition coil supply voltage + with ballast V12,0
Distributor (ECM) MakeHitachi

Firing order

The firing order for the Mazda 323 1.6 Turbo (1987–1989) is 1-3-4-2.

Firing order1-3-4-2

Valve clearances

Valve clearances on the Mazda 323 1.6 Turbo (1987–1989) are hydraulic — they self-adjust, so no manual clearance figure applies.

Valve clearance - INLET mmHydraulic
Valve clearance - EXHAUST mmHydraulic

Engine oil & fluids

Engine oil

The Mazda 323 1.6 Turbo (1987–1989) takes 3.5 litres of engine oil with the filter.

A listed engine oil option is SAE 5W-30 for cold climates, with API/ACEA classification SJ/A2.

A listed engine oil option is SAE 10W-30 for moderate climates, with API/ACEA classification SJ/A2.

A listed engine oil option is SAE 10W-40 as an alternative for moderate climates, with API/ACEA classification SJ/A2.

A listed engine oil option is SAE 20W-40 for hot climates, with API/ACEA classification SJ/A2.

Manual gearbox

The manual gearbox has a listed capacity of 3.35 litres. The specified oil is Dexron II.

Coolant

The listed total cooling-system capacity is 6.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range Cold climate
Engine oil grade SAE 5W-30
Engine oil classification API/ACEA SJ/A2
Ambient temperature range Moderate climate
Engine oil grade SAE 10W-30
Engine oil classification API/ACEA SJ/A2
Ambient temperature range Moderate climate alternative
Engine oil grade SAE 10W-40
Engine oil classification API/ACEA SJ/A2
Ambient temperature range Hot climate
Engine oil grade SAE 20W-40
Engine oil classification API/ACEA SJ/A2
Engine with filter(s) litres 3.5
Other lubricants and capacities
Manual transmission oil grade SAE Dexron II
Manual transmission litres 3.35
Automatic transmission fluid Type Dexron II
Automatic transmission (dry fill) litres 5.7
Cooling system - total capacity litres 6.0

Brakes & wear limits

Brake disc thickness

Brake discs on the Mazda 323 1.6 Turbo (1987–1989) are replaced at a minimum thickness of 16 mm (ventilated) front and 8 mm rear.

Minimum disc thickness for replacement - ventilated Front16 mm
Minimum disc thickness for replacement Rear8 mm
Maximum drum diameter for replacement Rear201 mm

Brake disc and drum dimensions

Disc runout Front0,10 mm
Disc runout Rear0,10 mm
Minimum pad thickness Front1 mm
Minimum pad thickness Rear1 mm
Parking brake travel No. of notches9-15

Service & electrical

Ignition timing

Basic ignition timing for the Mazda 323 1.6 Turbo (1987–1989) is 12°±1° BTDC at 850 rpm.

Ignition timingWithout vacuum
Ignition timing - basic BTDC °Engine/rpm12±1/850

Battery

The Mazda 323 1.6 Turbo (1987–1989) uses a 12 V, 55 Ah battery (reserve capacity 85 minutes).

Battery V/RC(Ah)12/85 (55)

Spark plugs

The Mazda 323 1.6 Turbo (1987–1989) uses NGK BCPR6E-11 spark plugs with a 1,1 mm electrode gap.

Spark plugs Original equipmentNGK
Spark plug TypeBCPR6E-11
Electrode gap mm1,1
Spark plugs MakeAutolite
Spark plug Type3922
Electrode gap mm0,8
Spark plugs MakeBeru
Spark plug Type14FR-7DU
Electrode gap mm0,8
Spark plugs MakeBosch
Spark plug TypeFR7DC
Electrode gap mm0,8
Spark plugs MakeChampion
Spark plug TypeRC8YC4
Electrode gap mm1,1
Spark plugs MakeNGK
Spark plug TypeBCPR6-11
Electrode gap mm1,1

Tuning and emissions

Ignition advanceWithout vacuum and basic timing
Ignition advance checks °Engine/rpm0-1/1200
Ignition advance checks °Engine/rpm18/5000
Ignition advance checks °Engine/rpm25/5800
Vacuum checkIgnition timing advances
Vacuum range °Engine9
Vacuum starts mbar80
Vacuum ends mbar600
Idle speed rpm850±50
Oil temperature °C60
CO level at idle speed - tailpipe Vol. % CO1,0-2,0
HC level at idle speed ppm300
CO2 level at idle speed Vol. % CO213-16
O2 level at idle speed Vol. % O20,5-2,0

Starting and charging

Starter motor MakeMitsubishi
Starter motor Type0,85 kW
Minimum starting voltage V11,5
Maximum cranking amps A149-182
Alternator MakeMitsubishi
Alternator output A/V/rpm60/13,5/3000
Regulated voltage V14,1-14,7

Service checks and adjustments

Compression pressure bar7,7-11,0
Oil pressure bar/rpm3,4-4,4/3000
Radiator cap bar0,74-1,05
Thermostat opens °C82
Drive belt size - alternator mm9,5x888
Drive belt size - PAS/AC mm4PKx875
Drive belt tension - alternator/PAS/AC mm9-10

Fuel system

System pressure bar2,45-2,85
Regulated pressure with vacuum bar1,7-2,2
Engine coolant temperature (ECT) sensor Ohm/°C290-354/80
Injector Ohm1,3-2,5
Idle air control (IAC) valve/idle speed control (ISC) actuator Ohm20,0-50,0

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Mazda 323 1.6 Turbo (1987–1989) are tightened in 3 stages: 30 Nm, then 55 Nm, then a final 76-81 Nm.

Cylinder head
Renew boltsNo
Tighten30 Nm
Tighten55 Nm
Tighten76-81 Nm
Cylinder head instructions—
Other engine tightening torques
Main bearings Renew bolts/nutsNo
Main bearings Stage 127 Nm
Main bearings Stage 254-59 Nm
Big end bearings Renew bolts/nutsNo
Big end bearings Stage 133 Nm
Big end bearings Stage 265-69 Nm
Oil pump to cylinder block20-25 Nm
Sump bolts10 Nm
Sump drain bolt30-40 Nm
Flywheel/driveplate100 Nm
Clutch pressure plate18-26 Nm
Crankshaft pulley/damper centre bolt108-128 Nm
Camshaft sprocket/gear43-61 Nm
Camshaft carrier/cap11-14 Nm
Camshaft/rocker cover5-9 Nm
Inlet manifold to cylinder head20-30 Nm
Exhaust manifold to cylinder head40-55 Nm
Spark plugs15-23 Nm
Chassis tightening torques
Front hub157-235 Nm
Steering track rod end29-44 Nm
Brake caliper/carrier to hub Front—
Brake caliper carrier to hub
Brake caliper/carrier to hub Rear20 Nm
Road wheels90-120 Nm

Frequently asked questions

What is the firing order of the Mazda 323 1.6 Turbo?

The firing order for the Mazda 323 1.6 Turbo (1987–1989) is 1-3-4-2.

What spark plugs does the Mazda 323 1.6 Turbo use?

The Mazda 323 1.6 Turbo (1987–1989) uses NGK BCPR6E-11 spark plugs with a 1,1 mm electrode gap.

How much oil does the Mazda 323 1.6 Turbo take?

The Mazda 323 1.6 Turbo (1987–1989) takes 3.5 litres of engine oil with the filter. A listed engine oil option is SAE 5W-30 for cold climates, with API/ACEA classification SJ/A2. A listed engine oil option is SAE 10W-30 for moderate climates, with API/ACEA classification SJ/A2. A listed engine oil option is SAE 10W-40 as an alternative for moderate climates, with API/ACEA classification SJ/A2. A listed engine oil option is SAE 20W-40 for hot climates, with API/ACEA classification SJ/A2.

What are the valve clearances for the Mazda 323 1.6 Turbo?

Valve clearances on the Mazda 323 1.6 Turbo (1987–1989) are hydraulic — they self-adjust, so no manual clearance figure applies.

What is the cylinder head torque for the Mazda 323 1.6 Turbo?

The cylinder head bolts on the Mazda 323 1.6 Turbo (1987–1989) are tightened in 3 stages: 30 Nm, then 55 Nm, then a final 76-81 Nm.

What is the ignition timing for the Mazda 323 1.6 Turbo?

Basic ignition timing for the Mazda 323 1.6 Turbo (1987–1989) is 12°±1° BTDC at 850 rpm.

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