| Item name | Spare part catalog number | Description |
| 1 | - | EGR Modulator/Cooler Assembly |
| 2 | - | Electronic throttle |
| 3 | - | EGR thermostat (since 2007 model year) |
| 4 | - | The pipe connecting the EGR to the electronic throttle valve |
| 5 | - | EGR cooler |
| 6 | - | EGR modulator valve |
| 7 | - | EGR modulator solenoid valve |
| 8 | - | EGR Coolant Hoses |
EGR system
The EGR system includes:
- EGR modulator x 2
- EGR Cooler x 2
- Corresponding connecting tubes
EGR cooler and modulator
| Item name | Spare part catalog number | Description |
| 1 | - | EGR modulator |
| 2 | - | EGR cooler |
| 3 | - | EGR thermostat (since 2007 model year) |
Electric throttle body
| Item name | Spare part catalog number | Description |
| 1 | - | Intake Air Temperature Sensor |
| 2 | - | Electric throttle body |
| 3 | - | Throttle valve |
| 4 | - | Throttle actuator motor |
| 5 | - | Gas inlet port |
The EGR modulator and cooler are combined into one unit.
The combined cooler and EGR modulator for each bank of cylinders are located between the exhaust manifold and the cylinder head. The EGR system is connected to the vehicle's cooling system via hoses on the cooler side. The inlet side of the module is connected directly to its exhaust manifold. Exhaust gases pass through the cooler and are then fed through an actuator and a metal pipe to the throttle body. The EGR modulator is a solenoid valve that is controlled by the ECM. The ECM uses the EGR modulator to control the amount of exhaust gas that is recirculated to reduce exhaust emissions and combustion noise. EGR is activated when the engine is at normal operating temperature and driving at a constant speed.
On vehicles from the 2007 model year, a solid-fill flow-regulating thermostat is installed in the EGR cooler's coolant outlet. The thermostat is designed to speed up engine warm-up, improve the performance of the interior heater and reduce the content of toxic substances in the exhaust gases to meet the requirements of the EU4 standard. In the cold state, the thermostat is closed, starts opening at 75°C, and is fully open at normal operating temperature. The thermostat has a small drain hole that allows a small amount of cooling liquid to drain out when it is cold.
The EGR modulator receives 12V from the main relay. The solenoid ground is provided by the ECM and is switched by a PWM signal. The PWM signal to the solenoid ground varies to set the exact amount of exhaust gas supplied to the cylinders.
EGR modulators perform a full cycle of operation every time the engine is started to clear out soot and carbon deposits.
If the EGR modulator fails, the EGR function will be inoperative. The ECM can monitor the EGR modulator solenoid for a short circuit and generate fault codes if a fault occurs. The modulator can also be activated for testing using the Land Rover recommended diagnostic system.
Crankcase ventilation
| Item name | Spare part catalog number | Description |
| 1 | - | Breather tube |
| 2 | - | Oil separator |
| 3 | - | Breather tube |
| 4 | - | Oil drain pipe to the pan |
| 5 | - | |
| 6 | - | Oil drain valve into the pan |
| 7 | - | Circulation of crankcase gases |
The TDV6 engine's crankcase ventilation system ensures separation of oil from crankcase gases generated during engine operation.
Crankcase gases enter the oil separator from the crankcase and from under the valve covers of both cylinder banks. In the oil separator, oil is separated from the crankcase gases. The gases are directed back into the intake tract to a point before the compressor. The oil drains into the sump through a drain valve located at the rear of the cylinder block.
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