INTRODUCTION
Note. All diagnostic information, specifications and test procedures for current models is contained in Land Rovers proprietary TestBook system.
Use this article to quickly find specifications related to servicing and on-vehicle adjustments. This is a quick-reference article to use when you are familiar with an adjustment procedure and only need a specification.
CAPACITIES
| Application | Quantity |
|---|
| Crankcase (Includes Filter) |
| Discovery Series I | 6.3 Qts. (6.0L) |
| Discovery Series II | 6.6 Qts. (6.2L) |
| Range Rover | 6.2 Qts. (5.8L) |
| Cooling System (Includes Heater) |
| Discovery Series I & Range Rover | 12.0 Qts. (11.4L) |
| Discovery Series II | 13.1 Qts. (12.4L) |
| Man. Transmission (Texaco MTF 94) |
| Discovery Series I | 2.8 Qts. (2.7L) |
| Range Rover | 2.3 Qts. (2.2L) |
| Auto. Transmission (Dexron-III) |
| Discovery Series I | 9.5 Qts. (9.0L) |
| Discovery Series II | 9.9 Qts. (9.3L) |
| Range Rover | 10.2 Qts. (9.7L) |
| Differential |
| Discovery Series I (2) | 1.8 Qts. (1.7L) |
| Discovery Series II & Range Rover (3) | 1.8 Qts. (1.7L) |
| Transfer Case |
| Discovery Series I (2) | 2.4 Qts. (2.3L) |
| Discovery Series II (3) | 2.1 Qts. (2.1L) |
| Range Rover (4) | 2.4 Qts. (1.9L) |
| (1) Fluid capacities are approximate and provided as a guide only. All fluid levels must be verified using dipstick or fluid level plugs. (2) Use MIL-L-2105 90W EP or equivalent for average ambient temperatures of 14°F (-10°C) or more. Use MIL-L-2105B, C and D 80W EP or equivalent for average ambient temperatures of 70°F (21°C) or less. (3) Use Texaco Multigear API GL5MTI fully synthetic 75W/90R or equivalent for all ambient temperature ranges. (4) Use Dexron-III or equivalent for all ambient temperature ranges. |
| (1) | Fluid capacities are approximate and provided as a guide only. All fluid levels must be verified using dipstick or fluid level plugs. |
| (2) | Use MIL-L-2105 90W EP or equivalent for average ambient temperatures of 14°F (-10°C) or more. Use MIL-L-2105B, C and D 80W EP or equivalent for average ambient temperatures of 70°F (21°C) or less. |
| (3) | Use Texaco Multigear API GL5MTI fully synthetic 75W/90R or equivalent for all ambient temperature ranges. |
| (4) | Use Dexron-III or equivalent for all ambient temperature ranges. |
SERVICE INTERVALS & SPECIFICATIONS
| Component | Interval (Miles) |
|---|
| Air Filter | (1) 30,000 |
| Brake Fluid | 30,000 |
| Coolant | (2) 75,000 |
| Fuel Filter | (3) 90,000 |
| Engine Oil & Oil Filter | (1) 7500 |
| Front & Rear Differential Oil | (4) 30,000 |
| Oxygen Sensors | (5) 82,500 |
| Pollen Filters | (6) 15,000 |
| Serpentine Accessories Drive Belt Replacement | (7) 75,000 |
| Spark Plugs | (1) 60,000 |
| Transfer Case Oil | 30,000 |
| Transmission Filter (A/T) | (8) 30,000 |
| Transmission Fluid |
| A/T | 30,000 |
| M/T | 30,000 |
| (1) Required emissions maintenance. On all models, when replacing air cleaner, ensure air cleaner housing drain holes are clear. (2) Change engine coolant every 30,000 miles on Discovery Series I. (3) Change fuel filter every 60,000 miles on Discovery Series I. (4) On Discovery Series II when using synthetic gear oil, change front and rear differential oil every 90,000 miles. If using conventional gear oil, change every 30,000 miles. On all models, drain and refill using measured quantity of specified gear oil. Correct fill level may be below the level of the filler plug. (5) Required emissions maintenance on Discovery Series I. Reset Emission Maintenance Reminder light and change oxygen sensors at 82,500 miles. (6) Range Rover. (7) On Discovery Series II, equipped with Active Cornering Enhancement (ACE), replace serpentine drive belt at 45,000 miles. (8) Replace transmission oil filter during first fluid change only. Subsequent filter replacement is not required. |
| (1) | Required emissions maintenance. On all models, when replacing air cleaner, ensure air cleaner housing drain holes are clear. |
| (2) | Change engine coolant every 30,000 miles on Discovery Series I. |
| (3) | Change fuel filter every 60,000 miles on Discovery Series I. |
| (4) | On Discovery Series II when using synthetic gear oil, change front and rear differential oil every 90,000 miles. If using conventional gear oil, change every 30,000 miles. On all models, drain and refill using measured quantity of specified gear oil. Correct fill level may be below the level of the filler plug. |
| (5) | Required emissions maintenance on Discovery Series I. Reset Emission Maintenance Reminder light and change oxygen sensors at 82,500 miles. |
| (7) | On Discovery Series II, equipped with Active Cornering Enhancement (ACE), replace serpentine drive belt at 45,000 miles. |
| (8) | Replace transmission oil filter during first fluid change only. Subsequent filter replacement is not required. |
DRIVE BELT INSPECTION
Note. All models are equipped with automatic belt tensioner. Belt tension adjustment is not required. If belt is removed and reinstalled, ensure direction of belt rotation is not changed. If belt tensioner arm and spring case are touching, replace belt tensioner.
- Using a belt tension gauge, check drive belt tension. Check belt tension several times at the same point away from tensioner. Start and run engine between each check. On a used belt and tensioner without A/C, tension should be approximately 60.7 lbs. (27.5 kg). On a used belt and tensioner with A/C, tension should be 66.3 lbs. (30.1 kg). If belt tension is as specified, go to next step. If belt tension is not as specified, replace belt tensioner.
- If belt tensioner arm and spring case are touching, replace belt tensioner. If belt tensioner is okay, start engine and allow to idle. Normal belt tensioner movement or bounce should be approximately 0.2" (5.0 mm). If tensioner movement is 0.5" (12.0 mm) or more, replace belt tensioner. Ensure drive belt is not stretched. Replace drive belt as necessary.
ENGINE COMPRESSION
Check engine compression at normal operating temperature with all spark plugs removed. To prevent damage to catalytic converter, make tests quickly and only when necessary.
Note. Compression specifications are not supplied by manufacturer. Difference between cylinders must not exceed 25%.
VALVE CLEARANCE
Note. All models are equipped with hydraulic lifters. No adjustments are required.
IGNITION COIL
| Application | Primary | Secondary |
|---|
| Discovery Series I | 0.80 | 13,000 |
| Except Discovery Series I | 0.45-0.55 | 12,000-14,600 |
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
SPARK PLUGS
| Application | Champion No. |
|---|
| Discovery Series I | RN11YCC |
| Except Discovery Series I | (1) RC11PYPB4 |
| (1) Do not attempt to adjust gap of RC11PYB4 spark plugs. |
| (1) | Do not attempt to adjust gap of RC11PYB4 spark plugs. |
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|
| Discovery Series I | 0.035-0.040 (0.89-1.02) | 14-16 (19-22) |
| Except Discovery Series I | 0.038-0.042 (0.95-1.05) | 14-16 (19-22) |
SPARK PLUG SPECIFICATIONS
Scheme 1
Scheme 1: Firing Order (Discovery)
Scheme 2
Scheme 2: Firing Order (Range Rover)
IGNITION TIMING
On Discovery Series I, ignition timing is controlled by Land Rover's Generic Engine Management System (GEMS) through the Engine Control Module (ECM) and is not adjustable. ECM, using Knock Sensor (KS), Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor signals, can adjust each cylinder according to individual needs. Based on engine speed and load an optimum ignition timing can be set for each cylinder. As a result, there can be 8 different settings simultaneously. Always refer to SERVICE INFORMATION underhood label in engine compartment. If underhood label and manual specifications differ, always use underhood label specifications.
On Discovery Series II and Range Rover, ignition timing is controlled by Bosch Motronic M5.2.1 engine management system through the ECM and is not adjustable. ECM calculates ignition timing using input signals from the Crankshaft Position (CKP) sensor, Knock Sensor (KS), Mass Airflow (MAF) sensor, Throttle Position (TP) sensor (idle only) and Engine Coolant Temperature (ECT) sensor. ECM calculates dwell timing from battery voltage and engine speed. Individual cylinder spark timing is calculated based on engine speed, load and coolant temperature, knock control, automatic gearbox shift control and idle speed control.
| Application | Specification |
|---|
| Discovery Series I | (2) |
| Discovery Series II | (3) 12° |
| Range Rover | (3) 12° |
| (1) Idle speed and timing are computer controlled and are not adjustable. (2) Information not available from manufacturer. (3) Expected value of ignition timing at normal operating temperature. |
| (1) | Idle speed and timing are computer controlled and are not adjustable. |
| (2) | Information not available from manufacturer. |
| (3) | Expected value of ignition timing at normal operating temperature. |
IGNITION TIMING (Degrees BTDC) (1)
Regulated Fuel Pressure
There are 8 fuel injectors, one per cylinder which the ECM operates sequentially. On Discovery Series I, regulated fuel pressure should be 35-37 psi (2.5-2.6 kg/cm 2 ) and varies depending on amount of intake manifold vacuum acting on fuel pressure regulator. On Discovery Series II and Range Rover, all 8 injectors are fed from a common fuel rail as part of a returnless fuel system. Fuel pressure is maintained at a approximately 50-52 psi (3.5-3.6 kg/cm 2 ) by a regulator that is integral with the fuel pump.
FUEL INJECTOR RESISTANCE
| Application | Ohms |
|---|
| Discovery Series I | 15.7-16.7 |
| Except Discovery Series I | 13.8-15.2 |
FUEL INJECTOR RESISTANCE - Ohms @ 68°F (20°C)
IDLE SPEED & MIXTURE
Note. Engine idle speed and mixture are controlled by ECM based on signals from various sensors and are not adjustable. Values given in IDLE SPEED & MIXTURE SPECIFICATIONS table are for verification purposes only. Always refer to SERVICE INFORMATION underhood label in engine compartment. If underhood label and manual specifications differ, always use underhood label specifications.
| Application | Specification |
|---|
| Base Idle Speed (1) |
| Discovery Series I |
| In Neutral With A/C Off | 597-653 |
| In Neutral With A/C On | 672-728 |
| Discovery Series II (2) | 610-710 RPM |
| Range Rover (2) | 660 RPM |
| CO @ Idle |
| Range Rover | (3) |
| Discovery Series I & II | Less Than 0.5% |
| (1) Idle speed is controlled by ECM through Idle Air Control (IAC) valve. With engine at normal operating temperature, IAC valve should be set to 20-25 steps. (2) In Neutral with A/C off. (3) Information not available from manufacturer. |
| (1) | Idle speed is controlled by ECM through Idle Air Control (IAC) valve. With engine at normal operating temperature, IAC valve should be set to 20-25 steps. |
| (2) | In Neutral with A/C off. |
| (3) | Information not available from manufacturer. |
IDLE SPEED & MIXTURE SPECIFICATIONS
