Mazda1985–1987Technical specifications

323 1.6: Technical specifications

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

Summary

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

Vehicle specifications

Overview

Make: Mazda
Model: 323
Years: 1985–1987
Fuel: Petrol
Engine code: B6

Performance & efficiency

Power: 77 kW (105 hp)
Engine size: 1,597 cc
Cylinders: 4 · OHC
Compression ratio: 10.5:1
Fuel system: Mazda

Fluids & capacities

Engine oil (with the filter): 3.3 litres

All 94 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/OHC
Capacity (Fiscal) cc	1597 (1587)
Compression ratio :1	10,5
Suitable for unleaded petrol	No
Minimum octane rating RON	98
Ignition system Type	TSZ-i
Ignition system Description	Trans-i
Trigger location	Distributor
Fuel system Make	Mazda
Fuel system Type	EGI
Fuel system Description	MFI-i
Air metering Type	Flow
Combined ignition and fuel ECM	No
Diagnostic socket	Yes

Ignition system

Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	1,0-1,3
Secondary resistance Ohm	6000-30000
Distributor (ECM) Make	Mitsubishi

Firing order

The firing order for the Mazda 323 1.6 (1985–1987) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances for the Mazda 323 1.6 (1985–1987) are 0,30 mm inlet and 0,30 mm exhaust, measured hot.

Valve clearance - INLET mm	0,30 hot
Valve clearance - EXHAUST mm	0,30 hot

Engine oil & fluids

Engine oil

The Mazda 323 1.6 (1985–1987) takes 3.3 litres of engine oil with the filter.

A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SG.

A listed engine oil option is SAE 20W-50 as an alternative for moderate climates.

Manual gearbox

The manual gearbox has a listed capacity of 3.2 litres. The specified oil is SAE 80W-90.

Coolant

The listed total cooling-system capacity is 5.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	10W-40
Engine oil classification API/ACEA	SG
Ambient temperature range	Moderate climate alternative
Engine oil grade SAE	20W-50
Engine with filter(s) litres	3.3
Other lubricants and capacities
Manual transmission oil grade SAE	80W-90
Manual transmission litres	3.2
Automatic transmission fluid Type	ATF-G
Automatic transmission (dry fill) litres	5.7
Cooling system - total capacity litres	5.0

Brakes & wear limits

Brake disc thickness

Brake discs on the Mazda 323 1.6 (1985–1987) are replaced at a minimum thickness of 16 mm (ventilated) front and 8 mm rear.

Minimum disc thickness for replacement - ventilated Front	16 mm
Minimum disc thickness for replacement Rear	8 mm
Maximum drum diameter for replacement Rear	201 mm

Service & electrical

Ignition timing

Basic ignition timing for the Mazda 323 1.6 (1985–1987) is 6°±1° BTDC at 1000 rpm.

Ignition timing	Without vacuum
Ignition timing - basic BTDC °Engine/rpm	6±1/1000

Battery

The Mazda 323 1.6 (1985–1987) uses a 12 V, 35 Ah battery (reserve capacity 55 minutes).

Battery V/RC(Ah)	12/55 (35)

Spark plugs

The Mazda 323 1.6 (1985–1987) uses NGK BPR6ES spark plugs with a 0,8 mm electrode gap.

Spark plugs Original equipment	NGK
Spark plug Type	BPR6ES
Electrode gap mm	0,8
Spark plugs Make	Autolite
Spark plug Type	64
Electrode gap mm	1,1
Spark plugs Make	Bosch
Spark plug Type	WR8DCX
Electrode gap mm	1,1
Spark plugs Make	Champion
Spark plug Type	RN9YCC4
Electrode gap mm	1,1
Spark plugs Make	NGK
Spark plug Type	BPR6ES
Electrode gap mm	0,8

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	0/1250
Ignition advance checks °Engine/rpm	19/3000
Ignition advance checks °Engine/rpm	23/6500
Vacuum check	Ignition timing advances
Vacuum range °Engine	24
Vacuum starts mbar	160
Vacuum ends mbar	266
Idle speed rpm	1000±50
Oil temperature °C	60
CO level at idle speed - tailpipe Vol. % CO	1,5±0,5
HC level at idle speed ppm	300
CO2 level at idle speed Vol. % CO2	13-16
O2 level at idle speed Vol. % O2	0,5-2,0

Starting and charging

Starter motor Make	Mitsubishi
Starter motor Type	0,85 kW
Minimum starting voltage V	11,5
Maximum cranking amps A	95-116
Alternator Make	Mitsubishi
Alternator Type	12V 55A
Alternator output A/V/rpm	60/13,5/3000
Regulated voltage V	14,4-15,0

Service checks and adjustments

Compression pressure bar	14,5
Oil pressure bar/rpm	3-4/3000
Radiator cap bar	0,75-1,05
Thermostat opens °C	82
Drive belt size - alternator mm	9,5x900
Drive belt tension - alternator/PAS/AC mm	9-10

Fuel system

Fuel pump delivery pressure bar	4,5-6,0
System pressure bar	2,5-2,8
Regulated pressure with vacuum bar	2,0-2,2

Tightening torques

Cylinder head bolt torque

The cylinder head bolt torque for the Mazda 323 1.6 (1985–1987) is 75-81 Nm.

Cylinder head
Tighten	75-81 Nm

Other engine tightening torques
Cylinder head instructions	—
Main bearings Stage 1	27-29 Nm
Main bearings Stage 2	54-59 Nm
Big end bearings Stage 1	25-26 Nm
Big end bearings Stage 2	50-55 Nm
Flywheel/driveplate	100 Nm/100 Nm
Crankshaft pulley/damper centre bolt	108-128 Nm
Spark plugs	15-23 Nm
Chassis tightening torques
Front hub	157-235 Nm
Road wheels	90-120 Nm

Frequently asked questions

What is the firing order of the Mazda 323 1.6?

The firing order for the Mazda 323 1.6 (1985–1987) is 1-3-4-2.

What spark plugs does the Mazda 323 1.6 use?

The Mazda 323 1.6 (1985–1987) uses NGK BPR6ES spark plugs with a 0,8 mm electrode gap.

How much oil does the Mazda 323 1.6 take?

The Mazda 323 1.6 (1985–1987) takes 3.3 litres of engine oil with the filter. A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SG. A listed engine oil option is SAE 20W-50 as an alternative for moderate climates.

What are the valve clearances for the Mazda 323 1.6?

Valve clearances for the Mazda 323 1.6 (1985–1987) are 0,30 mm inlet and 0,30 mm exhaust, measured hot.

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

The cylinder head bolt torque for the Mazda 323 1.6 (1985–1987) is 75-81 Nm.

What is the ignition timing for the Mazda 323 1.6?

Basic ignition timing for the Mazda 323 1.6 (1985–1987) is 6°±1° BTDC at 1000 rpm.