Engine & identification
Vehicle identification
| No. of cylinders Type | 4/OHC |
|---|---|
| Capacity (Fiscal) cc | 1970 (1956) |
| Compression ratio :1 | 8,6 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 91 |
| Ignition system Type | SZ |
| Ignition system Description | CB |
| Fuel system Make | Nikki |
| Fuel system Description | Carb-2V |
Ignition system
| Ballast resistance Ohm | 1,6 |
|---|---|
| Primary resistance Ohm | 1,5 |
| Distributor (ECM) Make | Mitsubishi |
| Contact breaker gap/trigger air gap mm | 0,45-0,55 |
| Dwell angle °(%) | 49-55 (54-61) |
Firing order
The firing order for the Mazda 929 2.0 (1978–1981) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Mazda 929 2.0 (1978–1981) 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 929 2.0 (1978–1981) takes 4.4 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SG.
Manual gearbox
The manual gearbox has a listed capacity of 1.7 litres.
Coolant
The listed total cooling-system capacity is 7.5 litres.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | Moderate climate |
| Engine oil grade SAE | 10W-40 |
| Engine oil classification API/ACEA | SG |
| Engine with filter(s) litres | 4.4 |
| Other lubricants and capacities | |
| Manual transmission litres | 1.7 |
| Automatic transmission (drain & refill) litres | 6.2 |
| Differential rear litres | 1.2 |
| Cooling system - total capacity litres | 7.5 |
Service & electrical
Ignition timing
Basic ignition timing for the Mazda 929 2.0 (1978–1981) is 8°±1° BTDC at 700 rpm.
| Ignition timing | Without vacuum |
|---|---|
| Ignition timing - basic BTDC °Engine/rpm | 8±1/700 |
Battery
The Mazda 929 2.0 (1978–1981) uses a 12 V, 40 Ah battery (reserve capacity 75 minutes).
| Battery V/RC(Ah) | 12/75 (40) |
|---|
Spark plugs
The Mazda 929 2.0 (1978–1981) 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 | 0,8 |
| Spark plugs Make | Bosch |
| Spark plug Type | WR8DC |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Champion |
| Spark plug Type | RN9YCC |
| Electrode gap mm | 0,8 |
| 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 | 8-11/2000 |
| Ignition advance checks °Engine/rpm | 16-19/3000 |
| Ignition advance checks °Engine/rpm | 23-27/4300 |
| Vacuum check | Ignition timing advances |
| Vacuum range °Engine | 18 |
| Vacuum starts mbar | 213 |
| Vacuum ends mbar | 373 |
| Idle speed rpm | 700-750 |
| Idle speed - alternative rpm | AT=650-700/D |
| Oil temperature °C | 60 |
| CO level at idle speed - tailpipe Vol. % CO | 2,5±0,5 |
| HC level at idle speed ppm | 400 |
| HC level at idle - alternative ppm | -1980=500 |
| CO2 level at idle speed Vol. % CO2 | 13-16 |
| O2 level at idle speed Vol. % O2 | 0,5-2,0 |
Starting and charging
| Minimum starting voltage V | 11,5 |
|---|---|
| Maximum cranking amps A | 103-125 |
| Alternator Make | Mitsubishi |
| Alternator output A/V/rpm | 40/14/2500 |
| Regulated voltage V | 14,1-14,7 |
Service checks and adjustments
| Compression pressure bar | 12,0 |
|---|---|
| Oil pressure bar/rpm | 3,5-4,5 |
| Radiator cap bar | 0,90 |
| Thermostat opens °C | 82 |
| Drive belt size - alternator mm | 12,5x975 |
| Drive belt tension - alternator/PAS/AC mm | 12-14 |
Fuel system
| Fuel pump delivery pressure bar | 0,2-0,25 |
|---|
Tightening torques
Cylinder head bolt torque
The cylinder head bolt torque for the Mazda 929 2.0 (1978–1981) is 82-88 Nm.
| Cylinder head | |
|---|---|
| Tighten | 82-88 Nm |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Stage 1 | 42 Nm |
| Main bearings Stage 2 | 85 Nm |
| Big end bearings Stage 1 | 25-26 Nm |
| Big end bearings Stage 2 | 50-55 Nm |
| Flywheel/driveplate | 160 Nm |
| Spark plugs | 15-23 Nm |
| Chassis tightening torques | |
| Road wheels | 95 Nm |
Frequently asked questions
What is the firing order of the Mazda 929 2.0?
The firing order for the Mazda 929 2.0 (1978–1981) is 1-3-4-2.
What spark plugs does the Mazda 929 2.0 use?
The Mazda 929 2.0 (1978–1981) uses NGK BPR6ES spark plugs with a 0,8 mm electrode gap.
How much oil does the Mazda 929 2.0 take?
The Mazda 929 2.0 (1978–1981) takes 4.4 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SG.
What are the valve clearances for the Mazda 929 2.0?
Valve clearances for the Mazda 929 2.0 (1978–1981) are 0,30 mm inlet and 0,30 mm exhaust, measured hot.
What is the cylinder head torque for the Mazda 929 2.0?
The cylinder head bolt torque for the Mazda 929 2.0 (1978–1981) is 82-88 Nm.
What is the ignition timing for the Mazda 929 2.0?
Basic ignition timing for the Mazda 929 2.0 (1978–1981) is 8°±1° BTDC at 700 rpm.