Range Rover Variable Valve Timing Sprocket

The Range Rover variable valve timing sprocket — also known as the camshaft phase adjuster — is a precision-engineered component at the heart of Jaguar Land Rover's Variable Valve Timing (VVT) system. Huizhan supplies OEM-quality Range Rover VVT sprockets in bulk for distributors, workshops, and B2B buyers worldwide, with a 15-day lead time and full compatibility across the AJ200 engine family.

Types Of Jaguar Land Rover Timing Gear Camshaft Phase Adjuster

Range Rover 2.0 Timing Gear Camshaft Phase Adjuster LR142279 - Air Intake

Buy Range Rover Variable Valve Timing Sprocket

OEM Part Numbers & Vehicle Compatibility

Huizhan's range rover variable valve timing sprockets cross-reference the following Jaguar Land Rover OEM numbers. Use this table to confirm fitment before placing a wholesale order:

OEM Part Number	Position	Compatible Models	Engine Code
LR142279/LR091759/JDE38702/JDE41016	Intake Side	Jaguar E-PACE, F-PACE, F-TYPE, XE, XF; Land Rover Defender, Discovery Sport, Discovery, Range Rover Evoque, Range Rover, Range Rover Sport, Range Rover Velar.	PT204 (AJ20P4)
LR091760/LR142281/JDE38703/JDE41018	Exhaust Side		PT204 (AJ20P4)
LR142279/LR091759/JDE38702/JDE41016	Intake Side	Jaguar E-PACE, F-PACE, F-TYPE, XE, XF; Land Rover Defender, Discovery Sport, Discovery, Range Rover Evoque, Range Rover, Range Rover Sport, Range Rover Velar.	PT204 (AJ20P4)
LR091760/LR142281/JDE38703/JDE41018	Exhaust Side		PT204 (AJ20P4)

All variants are compatible with both petrol and diesel engine configurations and meet or exceed OEM dimensional tolerances.

What Is a Range Rover Variable Valve Timing Sprocket?

A range rover variable valve timing sprocket is a hydraulically actuated gear mounted on the camshaft. It continuously adjusts the camshaft's angular position relative to the crankshaft, advancing or retarding valve timing in real time as engine conditions change.

The sprocket works in two modes depending on engine demand:

•Low-speed / light load: valve timing is retarded to reduce fuel consumption and smooth idle.

•High-speed / full load: valve timing advances to maximise intake charge and peak power output.

This dynamic adjustment is what allows the same 2.0-litre AJ200 engine to deliver both strong urban fuel economy and confident motorway overtaking — without mechanical compromise.

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What Is a Range Rover Variable Valve Timing Sprocket?

How Does the Range Rover VVT System Work?

The range rover variable valve timing sprocket receives pressurised engine oil through the oil control valve (OCV), which is directed by the Engine Control Unit (ECU). Oil pressure acting on the internal vane mechanism rotates the sprocket's outer housing forward or backward relative to its inner hub — advancing or retarding the camshaft phase angle by up to 40–50 crankshaft degrees, depending on the engine variant.

Key functional stages:

1.ECU reads engine speed, load, temperature, and throttle position sensors.

2.ECU sends a pulse-width modulated (PWM) signal to the OCV solenoid.

3.Oil pressure is routed to the advance or retard chamber inside the VVT sprocket.

4.The camshaft rotates to the commanded phase angle within milliseconds.

5.Actual position is confirmed via the camshaft position sensor, closing the feedback loop.

Because the adjustment is continuous — not on/off — the AJ200 engine maintains optimal combustion efficiency across the full RPM and load range.

What Are the Symptoms of a Failing Range Rover Variable Valve Timing Sprocket?

When the LR142279 camshaft phase adjuster fails, the vehicle may exhibit the following symptoms:

Unstable engine idle or engine misfire
Decreased acceleration, with sluggish power response
Rough acceleration, with reduced power, increased fuel consumption, and higher emissions, leading to poor fuel efficiency
Check engine light illuminated, usually indicating a problem with the VVT system

These symptoms may result from the camshaft phase adjuster failing to operate correctly. If you experience these issues, it's recommended to promptly inspect and replace the faulty part to prevent any further impact on the overall performance of the vehicle.

How to Replace the Jaguar Land Rover Camshaft Phase Adjuster LR142279? What Should Be Considered?

Steps for Replacing the Jaguar Land Rover Camshaft Phase Adjuster LR142279:

Preparation:

Tools and materials required: removal tools, new camshaft phase adjuster, cleaning agents, etc.
Open the hood and locate the camshaft phase adjuster.
Use the removal tools to detach the old camshaft phase adjuster and clean the area thoroughly.
Install the new camshaft phase adjuster and secure it with the appropriate screws.
Close the hood, start the engine, and check that it is running smoothly.

Important Notes:

Before replacing the part, refer to the service manual to understand the correct procedures and precautions.
Take care not to damage other components during the removal process.
Always use genuine parts from reputable manufacturers to ensure quality and performance meet OEM standards.
After installation, perform a test drive to ensure the engine runs without issues before resuming normal driving.

In summary, when replacing the camshaft phase adjuster, be sure to follow the steps carefully to ensure safety and reliability. If you're unsure of your ability, it’s recommended to seek assistance from a professional technician.