Engine & identification
Vehicle identification
| No. of cylinders Type | 6/OHV |
|---|---|
| Capacity (Fiscal) cc | 2625 (2608) |
| Output - alternative kW (DIN hp) rpm | LC=67 (90) |
| Compression ratio :1 | 7,8 LC=7,0 |
| Suitable for unleaded petrol | No |
| Minimum octane rating RON | 98 |
| Ignition system Type | SZ |
| Ignition system Description | CB |
| Fuel system Make | Stromberg |
| Fuel system Type | 175 CD |
| Fuel system Description | Carb-VV |
Ignition system
| Ignition coil Make | Lucas |
|---|---|
| Ignition coil Type | HA 12 |
| Primary resistance Ohm | 3,0-3,5 |
| Distributor (ECM) Make | Lucas |
| Distributor (ECM) No. | 25D6 |
| Contact breaker gap/trigger air gap mm | 0,4 |
| Dwell angle °(%) | 32-38 (53-63) |
Firing order
The firing order for the Land Rover Series III 2.6 (1971–1983) is 1-5-3-6-2-4.
| Firing order | 1-5-3-6-2-4 |
|---|
Valve clearances
Valve clearances for the Land Rover Series III 2.6 (1971–1983) are 0,15 mm inlet and 0,25 mm exhaust, measured hot.
| Valve clearance - INLET mm | 0,15 hot |
|---|---|
| Valve clearance - EXHAUST mm | 0,25 hot |
Engine oil & fluids
Engine oil
The Land Rover Series III 2.6 (1971–1983) takes 7.4 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SF.
Manual gearbox
The manual gearbox has a listed capacity of 1.5 litres. The specified oil is SAE 90W, with classification GL-4.
Transfer box
The transfer box has a listed capacity of 2.50 litres. The specified oil is SAE 90W, with classification GL-4.
Coolant
The listed total cooling-system capacity is 11.2 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 | SF |
| Engine with filter(s) litres | 7.4 |
| Other lubricants and capacities | |
| Manual transmission oil grade SAE | 90W |
| Manual transmission oil classification | GL-4 |
| Manual transmission litres | 1.5 |
| Differential oil grade - front SAE | 75W-90 |
| Differential front/AT litres | 1.75 |
| Differential oil grade - rear SAE | 75W-90 |
| Differential rear litres | 1.75 |
| Transfer box oil grade SAE | 90W |
| Transfer box oil classification | GL-4 |
| Transfer box litres | 2.50 |
| Cooling system - total capacity litres | 11.2 |
Service & electrical
Battery
The Land Rover Series III 2.6 (1971–1983) uses a 12 V, 58 Ah battery (reserve capacity 85 minutes).
| Battery V/RC(Ah) | 12/85 (58) |
|---|
Spark plugs
The Land Rover Series III 2.6 (1971–1983) uses Champion RN5C spark plugs with a 0,8 mm electrode gap.
| Spark plugs Original equipment | Champion |
|---|---|
| Spark plug Type | RN5C |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Bosch |
| Spark plug Type | W8CC |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Champion |
| Spark plug Type | RN5C |
| Electrode gap mm | 0,8 |
| Spark plugs Make | NGK |
| Spark plug Type | B5ES |
| Electrode gap mm | 0,8 |
Tuning and emissions
| Ignition advance | Without vacuum and basic timing |
|---|---|
| Ignition advance checks °Engine/rpm | 18-24/1800 |
| Ignition advance checks °Engine/rpm | 26-28/3000 |
| Ignition advance checks °Engine/rpm | 30-34/4000 |
| Vacuum check | Ignition timing advances |
| Vacuum starts mbar | 220 |
| Vacuum ends mbar | 845 |
| Idle speed rpm | 500 |
| Fast idle speed - MT/AT rpm | 1000-1200 |
| Oil temperature °C | 60 |
| CO level at idle speed - tailpipe Vol. % CO | 4,5 Max |
| HC level at idle speed ppm | 300 |
| HC level at idle - alternative ppm | -1982=400 |
| 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 | Lucas |
|---|---|
| Starter motor Type | M418G |
| Maximum cranking amps A | 157-191 |
| Alternator Make | Lucas |
| Alternator Type | 16ACR |
| Alternator output A/V/rpm | 34/14/2500 |
| Regulated voltage V | 14,1-14,5 |
Service checks and adjustments
| Compression pressure bar | 12-12,3 LC=9,8 |
|---|---|
| Oil pressure bar/rpm | 2,8-3,5 |
| Radiator cap bar | 0,60 |
| Thermostat opens °C | 75-80 |
| Drive belt tension - alternator/PAS/AC mm | 8,0-11,0 |
Fuel system
| Fuel pump delivery pressure bar | 0,15-0,26 |
|---|
Tightening torques
| Cylinder head instructions | — | |
|---|---|---|
| Other engine tightening torques | ||
| Main bearings Stage 1 | 52 Nm | |
| Main bearings Stage 2 | 104 Nm | |
| Big end bearings Stage 1 | 14 Nm | |
| Big end bearings Stage 2 | 28 Nm | |
| Flywheel/driveplate | 85-90 Nm | |
| Spark plugs | 14-19 Nm | |
| Chassis tightening torques | ||
| Road wheels | 108 Nm | |
Bar lengths use a square-root scale so small and large values stay readable.
Frequently asked questions
What is the firing order of the Land Rover Series III 2.6?
The firing order for the Land Rover Series III 2.6 (1971–1983) is 1-5-3-6-2-4.
What spark plugs does the Land Rover Series III 2.6 use?
The Land Rover Series III 2.6 (1971–1983) uses Champion RN5C spark plugs with a 0,8 mm electrode gap.
How much oil does the Land Rover Series III 2.6 take?
The Land Rover Series III 2.6 (1971–1983) takes 7.4 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-40 for moderate climates, with API/ACEA classification SF.
What are the valve clearances for the Land Rover Series III 2.6?
Valve clearances for the Land Rover Series III 2.6 (1971–1983) are 0,15 mm inlet and 0,25 mm exhaust, measured hot.
What battery does the Land Rover Series III 2.6 use?
The Land Rover Series III 2.6 (1971–1983) uses a 12 V, 58 Ah battery (reserve capacity 85 minutes).