Engine & identification
Vehicle identification
| No. of cylinders Type | 4/OHV |
|---|---|
| Capacity (Fiscal) cc | 1808 (>) |
| Compression ratio :1 | 8,5 |
| Suitable for unleaded petrol | No |
| Minimum octane rating RON | 91 |
| Ignition system Type | SZ |
| Ignition system Description | CB |
| Fuel system Make | Aisan |
| Fuel system Type | 3/300/001/039 |
| Fuel system Description | Carb-FJ |
Ignition system
| Ignition coil Make | Denso |
|---|---|
| Ignition coil Type | 90919-02006 |
| Ballast resistance Ohm | 1,3-1,7 |
| Primary resistance Ohm | 1,3-1,6 |
| Distributor (ECM) Make | Denso |
| Distributor (ECM) No. | 34044/36020 |
| Contact breaker gap/trigger air gap mm | 0,45 |
| Dwell angle °(%) | 50-54 (56-60) |
Firing order
The firing order for the Toyota Corona 1.8 (1975–1978) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Toyota Corona 1.8 (1975–1978) are 0,20 mm inlet and 0,36 mm exhaust, measured hot.
| Valve clearance - INLET mm | 0,20 hot |
|---|---|
| Valve clearance - EXHAUST mm | 0,36 hot |
Engine oil & fluids
Engine oil
The Toyota Corona 1.8 (1975–1978) takes 3.8 litres of engine oil with the filter. The specified engine oil grade is SAE 15W-40 for moderate climates, with API/ACEA classification SF.
Manual gearbox
The manual gearbox has a listed capacity of 2.6 litres.
Coolant
The listed total cooling-system capacity is 8.0 litres.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | Moderate climate |
| Engine oil grade SAE | 15W-40 |
| Engine oil classification API/ACEA | SF |
| Engine with filter(s) litres | 3.8 |
| Other lubricants and capacities | |
| Manual transmission litres | 2.6 |
| Automatic transmission (drain & refill) litres | 5.8 |
| Differential rear litres | 1.2 |
| Cooling system - total capacity litres | 8.0 |
Service & electrical
Ignition timing
Basic ignition timing for the Toyota Corona 1.8 (1975–1978) is 7° BTDC at 700 rpm.
| Ignition timing | Without vacuum |
|---|---|
| Ignition timing - basic BTDC °Engine/rpm | 7/700 |
Battery
The Toyota Corona 1.8 (1975–1978) uses a 12 V, 40 Ah battery (reserve capacity 60 minutes).
| Battery V/RC(Ah) | 12/60 (40) |
|---|
Spark plugs
The Toyota Corona 1.8 (1975–1978) uses Denso W20EPR spark plugs with a 1,0 mm electrode gap.
| Spark plugs Original equipment | Denso |
|---|---|
| Spark plug Type | W20EPR |
| Electrode gap mm | 1,0 |
| Spark plugs Make | Champion |
| Spark plug Type | RN9YC |
| Electrode gap mm | 0,8 |
Tuning and emissions
| Ignition advance | Without vacuum and basic timing |
|---|---|
| Ignition advance checks °Engine/rpm | 0/1200 |
| Ignition advance checks °Engine/rpm | 11/2100 |
| Ignition advance checks °Engine/rpm | 26/3200 |
| Vacuum check | Ignition timing advances |
| Vacuum range °Engine | 16 |
| Vacuum starts mbar | 107 |
| Vacuum ends mbar | 400 |
| Idle speed rpm | 600-700 |
| Fast idle speed - MT/AT rpm | 2400-2800 |
| Oil temperature °C | 60-80 |
| CO level at idle speed - tailpipe Vol. % CO | 1,0-4,0 |
| HC level at idle speed ppm | 500 |
| 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 | Denso |
|---|---|
| Maximum cranking amps A | 108-132 |
| Alternator Make | Nippon Denso |
| Alternator output A/V/rpm | 50/14/2500 |
| Regulated voltage V | 13,8-14,8 |
Service checks and adjustments
| Compression pressure bar | 9,0-12,0 |
|---|---|
| Oil pressure bar/rpm | 4,0 |
| Radiator cap bar | 0,90 |
| Thermostat opens °C | 82 |
| Drive belt size - alternator mm | 9,5x850 |
| Drive belt tension - alternator/PAS/AC mm | 8-12 |
Fuel system
| Fuel pump delivery pressure bar | 0,2-0,3 |
|---|
Tightening torques
Cylinder head bolt torque
The cylinder head bolt torque for the Toyota Corona 1.8 (1975–1978) is 100-120 Nm.
| Cylinder head | |
|---|---|
| Tighten | 100-120 Nm |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Stage 1 | 47-57 Nm |
| Main bearings Stage 2 | 95-115 Nm |
| Big end bearings Stage 1 | 27-33 Nm |
| Big end bearings Stage 2 | 54-66 Nm |
| Flywheel/driveplate | 80-90 Nm |
| Spark plugs | 15-21 Nm |
| Chassis tightening torques | |
| Road wheels | 90-120 Nm |
Frequently asked questions
What is the firing order of the Toyota Corona 1.8?
The firing order for the Toyota Corona 1.8 (1975–1978) is 1-3-4-2.
What spark plugs does the Toyota Corona 1.8 use?
The Toyota Corona 1.8 (1975–1978) uses Denso W20EPR spark plugs with a 1,0 mm electrode gap.
How much oil does the Toyota Corona 1.8 take?
The Toyota Corona 1.8 (1975–1978) takes 3.8 litres of engine oil with the filter. The specified engine oil grade is SAE 15W-40 for moderate climates, with API/ACEA classification SF.
What are the valve clearances for the Toyota Corona 1.8?
Valve clearances for the Toyota Corona 1.8 (1975–1978) are 0,20 mm inlet and 0,36 mm exhaust, measured hot.
What is the cylinder head torque for the Toyota Corona 1.8?
The cylinder head bolt torque for the Toyota Corona 1.8 (1975–1978) is 100-120 Nm.
What is the ignition timing for the Toyota Corona 1.8?
Basic ignition timing for the Toyota Corona 1.8 (1975–1978) is 7° BTDC at 700 rpm.