Mazda1986–1987Technical specifications

323 1.6 Turbo: Technical specifications

Workshop data for the 1.6-litre petrol (engine code B6 DOHC). Covers engine, fluids, 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: 1986–1987
Fuel: Petrol
Engine code: B6 DOHC

Performance & efficiency

Power: 103 kW (140 hp)
Engine size: 1,597 cc
Cylinders: 4 · DOHC
Compression ratio: 7.9:1
Fuel system: Mazda

Fluids & capacities

Engine oil (with the filter): 3.6 litres

All 88 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/DOHC
Capacity (Fiscal) cc	1597 (1585)
Compression ratio :1	7,9
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Type	HEI
Ignition system Description	Trans-i
Fuel system Make	Mazda
Fuel system Type	EGI
Fuel system Description	MFI-i

Ignition system

Ignition coil supply voltage + with ballast V	12,0
Primary resistance Ohm	1,03-1,22
Secondary resistance Ohm	10000-30000
Distributor (ECM) Make	Mitsubishi

Firing order

The firing order for the Mazda 323 1.6 Turbo (1986–1987) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances on the Mazda 323 1.6 Turbo (1986–1987) are hydraulic — they self-adjust, so no manual clearance figure applies.

Valve clearance - INLET mm	Hydraulic
Valve clearance - EXHAUST mm	Hydraulic

Engine oil & fluids

Engine oil

The Mazda 323 1.6 Turbo (1986–1987) takes 3.6 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 3.6 litres. The specified oil is SAE 80W-90.

Coolant

The listed total cooling-system capacity is 5.2 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	3.6
Other lubricants and capacities
Manual transmission oil grade SAE	80W-90
Manual transmission litres	3.6
Differential oil grade - rear SAE	80W-90
Differential rear litres	0.7
Cooling system - total capacity litres	5.2

Service & electrical

Ignition timing

Basic ignition timing for the Mazda 323 1.6 Turbo (1986–1987) is 12°±1° BTDC at 800 rpm.

Ignition timing	Without vacuum
Ignition timing - basic BTDC °Engine/rpm	12±1/800

Battery

The Mazda 323 1.6 Turbo (1986–1987) uses a 12 V, 45 Ah battery (reserve capacity 55 minutes).

Battery V/RC(Ah)	12/55 (45)

Spark plugs

The Mazda 323 1.6 Turbo (1986–1987) uses NGK BCPR6E-11 spark plugs with a 1,1 mm electrode gap.

Spark plugs Original equipment	NGK
Spark plug Type	BCPR6E-11
Electrode gap mm	1,1
Spark plugs Make	Autolite
Spark plug Type	3922
Electrode gap mm	0,8
Spark plugs Make	Champion
Spark plug Type	RC7YCC4
Electrode gap mm	1,1
Spark plugs Make	NGK
Spark plug Type	BCPR6E-11
Electrode gap mm	1,1

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	0-2/1200
Ignition advance checks °Engine/rpm	10-14/3500
Ignition advance checks °Engine/rpm	16-20/5500
Vacuum check	Ignition timing advances
Vacuum range °Engine	13-17
Vacuum starts mbar	80
Vacuum ends mbar	600
Idle speed rpm	850-950
Oil temperature °C	60
CO level at idle speed - tailpipe Vol. % CO	0,5 Max
CO level at idle speed - sample pipe Vol. % CO	1,0-2,0
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

Starting and charging

Starter motor Make	Mitsubishi
Starter motor Type	0,85 kW
Minimum starting voltage V	11,5
Maximum cranking amps A	122-149
Alternator Make	Mitsubishi
Alternator Type	12V 60A
Alternator output A/V/rpm	60/13,5/3000
Regulated voltage V	14,4-15,0

Service checks and adjustments

Compression pressure bar	7,6-10,8
Oil pressure bar/rpm	3,4-4,4/3000
Radiator cap bar	0,75-1,05
Thermostat opens °C	88
Drive belt size - alternator mm	9,5x888
Drive belt size - PAS/AC mm	4PKx875
Drive belt tension - alternator/PAS/AC mm	9-10/9-10

Fuel system

System pressure bar	2,45-2,85
Regulated pressure with vacuum bar	1,7-2,2

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Mazda 323 1.6 Turbo (1986–1987) are tightened in 3 stages: 30 Nm, then 50 Nm, then a final 76-81 Nm.

Cylinder head
Tighten	30 Nm
Tighten	50 Nm
Tighten	76-81 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	32-34 Nm
Big end bearings Stage 2	65-69 Nm
Flywheel/driveplate	96-103 Nm
Crankshaft pulley/damper centre bolt	108-128 Nm
Spark plugs	15-23 Nm
Chassis tightening torques
Front hub	157-235 Nm
Rear hub	157-235 Nm
Road wheels	90-120 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 (1986–1987) is 1-3-4-2.

What spark plugs does the Mazda 323 1.6 Turbo use?

The Mazda 323 1.6 Turbo (1986–1987) 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 (1986–1987) takes 3.6 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 Turbo?

Valve clearances on the Mazda 323 1.6 Turbo (1986–1987) 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 (1986–1987) are tightened in 3 stages: 30 Nm, then 50 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 (1986–1987) is 12°±1° BTDC at 800 rpm.