Engine & identification
Vehicle identification
| No. of cylinders Type | 4/OHV |
|---|---|
| Capacity (Fiscal) cc | 1796 |
| Compression ratio :1 | 8,6 |
| Suitable for unleaded petrol | No |
| Minimum octane rating RON | 98 |
| Ignition system Type | SZ |
| Ignition system Description | CB |
| Fuel system Make | SU |
| Fuel system Description | Carb-VV |
Ignition system
| Primary resistance Ohm | 3,4-4,2 |
|---|---|
| Distributor (ECM) Make | Mitsubishi |
| Distributor (ECM) No. | TVB4HL |
| Contact breaker gap/trigger air gap mm | 0,5 |
| Dwell angle °(%) | 49-55 (54-61) |
Firing order
The firing order for the Mazda 1800 1.8 (1969–1974) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Mazda 1800 1.8 (1969–1974) 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 1800 1.8 (1969–1974) takes 4.0 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 1.5 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 | 4.0 |
| Other lubricants and capacities | |
| Manual transmission litres | 1.5 |
| Automatic transmission (drain & refill) litres | 7.5 |
| Differential rear litres | 1.5 |
| Cooling system - total capacity litres | 7.5 |
Service & electrical
Ignition timing
Basic ignition timing for the Mazda 1800 1.8 (1969–1974) is 8° BTDC at 600 rpm.
| Ignition timing | Without vacuum |
|---|---|
| Ignition timing - basic BTDC °Engine/rpm | 8/600 |
Battery
The Mazda 1800 1.8 (1969–1974) uses a 12 V, 45 Ah battery (reserve capacity 65 minutes).
| Battery V/RC(Ah) | 12/65 (45) |
|---|
Spark plugs
The Mazda 1800 1.8 (1969–1974) uses NGK BP6ES spark plugs with a 0,8 mm electrode gap.
| Spark plugs Original equipment | NGK |
|---|---|
| Spark plug Type | BP6ES |
| 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 | BP6ES |
| Electrode gap mm | 0,8 |
Tuning and emissions
| Static timing | 8 |
|---|---|
| Ignition advance | Without vacuum and basic timing |
| Ignition advance checks °Engine/rpm | 5-7/2000 |
| Ignition advance checks °Engine/rpm | 13-15/3000 |
| Ignition advance checks °Engine/rpm | 16-20/5200 |
| Vacuum check | Ignition timing advances |
| Vacuum range °Engine | 15-17 |
| Vacuum starts mbar | 133 |
| Vacuum ends mbar | 400 |
| Idle speed rpm | 600 |
| Idle speed - alternative rpm | AT=650/D |
| Oil temperature °C | 60 |
| CO level at idle speed - tailpipe Vol. % CO | 4,5 Max |
Starting and charging
| Starter motor Make | Mitsubishi |
|---|---|
| Starter motor Type | RL2220F1 |
| Minimum starting voltage V | 8 |
| Alternator Make | Mitsubishi |
| Regulated voltage V | 13,5-14,5 |
Service checks and adjustments
| Compression pressure bar | 11,4 |
|---|---|
| Drive belt tension - alternator/PAS/AC mm | 11-13 |
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 1800 1.8 (1969–1974) is 80 Nm.
| Cylinder head | |
|---|---|
| Tighten | 80 Nm |
| Other engine tightening torques | |
|---|---|
| Main bearings Stage 1 | 42 Nm |
| Main bearings Stage 2 | 85 Nm |
| Big end bearings Stage 1 | 22 Nm |
| Big end bearings Stage 2 | 45 Nm |
| Flywheel/driveplate | 160 Nm |
| Spark plugs | 15-23 Nm |
| Chassis tightening torques | |
| Road wheels | 115 Nm |
Frequently asked questions
What is the firing order of the Mazda 1800 1.8?
The firing order for the Mazda 1800 1.8 (1969–1974) is 1-3-4-2.
What spark plugs does the Mazda 1800 1.8 use?
The Mazda 1800 1.8 (1969–1974) uses NGK BP6ES spark plugs with a 0,8 mm electrode gap.
How much oil does the Mazda 1800 1.8 take?
The Mazda 1800 1.8 (1969–1974) takes 4.0 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 1800 1.8?
Valve clearances for the Mazda 1800 1.8 (1969–1974) are 0,30 mm inlet and 0,30 mm exhaust, measured hot.
What is the cylinder head torque for the Mazda 1800 1.8?
The cylinder head bolt torque for the Mazda 1800 1.8 (1969–1974) is 80 Nm.
What is the ignition timing for the Mazda 1800 1.8?
Basic ignition timing for the Mazda 1800 1.8 (1969–1974) is 8° BTDC at 600 rpm.