Blade - Tensioner - Primary Chain for Discovery 3 (2005 – 2009) Lower – 4179614

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The primary chain tensioner blade is a wear component within the timing chain system of Land Rover's AJ-V8 engine, acting as a guide surface against which the tensioner piston bear s to maintain correct primary chain tension. On the 4.4 AJ Petrol and 4.2 Supercharged V8 engines, a worn or cracked tensioner blade can result in chain slap, rattling on cold start, or in severe cases, timing chain derailment and significant engine damage. Replacing a degraded blade restores correct chain control and prevents accelerated wear to the chain and sprockets. Key Features Lower primary chain tensioner blade, positioned at the lower run of the primary timing chain Designed for use with the AJ-V8 engine family fitted to Discovery 3, Range Rover, and Range Rover Sport OEM part number 4179614, ensuring correct fit and material specification Inspect the tensioner piston, upper guide blade, and chain for wear when replacing this component Vehicle Fitment Fits Discovery 3 (2005–2009) 4.4 AJ Petrol V8, Range Rover (2002–2009) 4.2 V8 Supercharged and 4.4 AJ Petrol V8 (to VIN 6A000001), and Range Rover Sport (2005–2009) 4.2 V8 Supercharged and 4.4 AJ Petrol V8. Not sure about fitment? Feel free to get in touch at [email protected] Show more