Engine & identification
Vehicle identification
| No. of cylinders Type | 4/DOHC |
|---|---|
| Capacity (Fiscal) cc | 1997 |
| Compression ratio :1 | 9,5 |
| Suitable for unleaded petrol | Yes |
| Minimum octane rating RON | 95 |
| Ignition system Description | Map-DI |
| Trigger location | Cam/Crankshaft |
| Fuel system Description | MFI-s(d) |
| Air metering Type | Mass/MAP |
| Combined ignition and fuel ECM | Yes |
| Diagnostic socket | Yes |
Ignition system
| Ignition coil supply voltage + with ballast V | 12,0 |
|---|
Firing order
The firing order for the Land Rover Discovery 2 Si4 (2017–2021) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances on the Land Rover Discovery 2 Si4 (2017–2021) 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 Land Rover Discovery 2 Si4 (2017–2021) takes 7.0 litres of engine oil with the filter. The specified engine oil grade is SAE 0W-20 for all ambient temperatures, with oil specification STJLR.03.5006.
Coolant
The listed coolant type is Havoline XLC. The recorded coolant colour is Orange. The listed total cooling-system capacity is 14.7 litres.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | All temperatures |
| Engine oil grade SAE | 0W-20 |
| Engine oil classification OEM | STJLR.03.5006 |
| Engine with filter(s) litres | 7.0 |
| View more information | — |
| Other lubricants and capacities | |
| Automatic transmission fluid Type | Shell L12108 (ZF Lifeguard 8) |
| Automatic transmission (drain & refill) litres | — |
| View more information | — |
| Filling and checking level | |
| Automatic transmission (dry fill) litres | 8.5 |
| Automatic transmission - dry fill capacity | |
| Differential oil grade - front SAE | 75W-90 Castrol SAF-XO |
| Differential front/AT litres | 0.51-0.54 |
| Differential oil grade - rear SAE | 75W-90 Castrol SAF-XO |
| Differential rear litres | 0.82-0.85 |
| Rear differential | |
| Transfer box oil grade SAE | — |
| Transfer box oil grade | |
| Transfer box litres | — |
| Transfer box oil | |
| Coolant Type | Havoline XLC |
| Coolant Colour | Orange |
| Cooling system - total capacity litres | 14.7 |
| Brake fluid Type | DOT 4 |
| Brake fluid classification | LRES22BF03 |
| Brake fluid litres | 0.9 |
Brakes & wear limits
Brake disc thickness
Brake discs on the Land Rover Discovery 2 Si4 (2017–2021) are replaced at a minimum thickness of 31 mm (ventilated) front and 23 mm (ventilated) rear.
| Minimum disc thickness for replacement - ventilated Front | 31 mm |
|---|---|
| Minimum disc thickness | |
| Minimum disc thickness for replacement - ventilated Rear | 23 mm |
Brake disc and drum dimensions
| Minimum disc thickness | ||
|---|---|---|
| Disc runout Front | 0,05 mm | |
| Disc runout Rear | 0,07 mm | |
| Minimum pad thickness Front | 2 mm | |
| Minimum pad thickness | ||
| Minimum pad thickness Rear | 3 mm | |
Bar lengths use a square-root scale so small and large values stay readable.
Service & electrical
Ignition timing
The ignition timing on the Land Rover Discovery 2 Si4 (2017–2021) is not adjustable.
| Ignition timing - basic BTDC °Engine/rpm | Not adjustable |
|---|
Tuning and emissions
| Ignition advance checks °Engine/rpm | ECM Controlled |
|---|---|
| Idle speed rpm | Not adjustable |
Service checks and adjustments
| Radiator cap bar | 1,40 |
|---|---|
| Thermostat opens °C | 95-108 |
Fuel system
| Fuel main pump delivery pressure bar | 200 Max |
|---|
Spark plugs
| Spark plug Type | H4P3-12405 (ACA) |
|---|---|
| Electrode gap mm | 0,60-0,65 |
Tightening torques
| Cylinder head instructions | — | |
|---|---|---|
| Cylinder head | ||
| Renew bolts | Yes | |
| Other engine tightening torques | ||
| Oil pump to cylinder block | 25 Nm | |
| Sump bolts | — | |
| View more information | — | |
| Sump bolts | ||
| Sump drain bolt | 25 Nm | |
| Flywheel/driveplate | -/30 Nm+120° | |
| Crankshaft pulley/damper bolts | 37 Nm+90° | |
| Camshaft sprocket/gear | 25 Nm+60° | |
| Camshaft carrier/cap | — | |
| View more information | — | |
| Camshaft carrier/cap | ||
| Inlet manifold to cylinder head | 12 Nm | |
| Water pump | 12 Nm | |
| Spark plugs | 23 Nm | |
| Fuel rail | 1)20 Nm 2)30 Nm | |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 8 Nm | |
| Camshaft position (CMP) sensor | 8 Nm | |
| Lambda sensor (Oxygen) | 48 Nm | |
| Knock sensor (KS) | 20 Nm | |
| Oil filter | 27 Nm | |
| Chassis tightening torques | ||
| Front hub | 120 Nm+60° | |
| Rear hub | 120 Nm+60° | |
| Steering wheel | 48 Nm | |
| Steering rack/box mounting | 110 Nm+240° | |
| Steering track rod end | 140 Nm | |
| Brake disc to hub Front | 10 Nm | |
| Brake caliper to carrier Front | 35 Nm | |
| Brake caliper/carrier to hub Front | 133 Nm+60° | |
| Brake disc to hub Rear | 10 Nm | |
| Rear brake disc to hub | ||
| Brake caliper to carrier Rear | 35 Nm | |
| Brake caliper/carrier to hub Rear | 110 Nm+120° | |
| ABS sensor Front | 9 Nm | |
| ABS sensor Rear | 9 Nm | |
| Road wheels | — | |
Bar lengths use a square-root scale so small and large values stay readable.
Air conditioning
| No. of AC service connectors | 2 |
|---|---|
| Air conditioning restrictor type | Expansion valve |
| Compressor clutch/magnetic coupling | Yes |
| Compressor variable displacement solenoid | Yes |
| Air conditioning refrigerant Type | — |
| Do not mix R134a with R1234yf. | |
| Air conditioning refrigerant quantity grams | 800±10 |
| Air conditioning refrigerant quantity | |
| Air conditioning oil group | PAG |
| Air conditioning oil Type | SPA2 |
| Air conditioning oil quantity cm³ | 80 |
Frequently asked questions
What is the firing order of the Land Rover Discovery 2 Si4?
The firing order for the Land Rover Discovery 2 Si4 (2017–2021) is 1-3-4-2.
How much oil does the Land Rover Discovery 2 Si4 take?
The Land Rover Discovery 2 Si4 (2017–2021) takes 7.0 litres of engine oil with the filter. The specified engine oil grade is SAE 0W-20 for all ambient temperatures, with oil specification STJLR.03.5006.
What are the valve clearances for the Land Rover Discovery 2 Si4?
Valve clearances on the Land Rover Discovery 2 Si4 (2017–2021) are hydraulic — they self-adjust, so no manual clearance figure applies.
What is the ignition timing for the Land Rover Discovery 2 Si4?
The ignition timing on the Land Rover Discovery 2 Si4 (2017–2021) is not adjustable.
What is the minimum brake disc thickness for the Land Rover Discovery 2 Si4?
Brake discs on the Land Rover Discovery 2 Si4 (2017–2021) are replaced at a minimum thickness of 31 mm (ventilated) front and 23 mm (ventilated) rear.