Discovery 5 / Range Rover Sport 3.0 Supercharged: Supercharger Removal & Service

The Jaguar Land Rover AJ126 3.0L Supercharged V6 cooling-system overhaul continues with removal of the supercharger from my 2020 Land Rover Discovery 5. With the surrounding components cleared in Part 1, we can now remove the intercooler and supercharger itself—then take advantage of the access to service the supercharger while it’s out of the vehicle. In this episode, I replace the factory spring-style supercharger snout coupler with a solid Eaton-style coupler and change the supercharger oil. Despite this Discovery having only around 30,000 miles, the original coupler already had noticeable play and there was visible wear where the coupler contacts the snout shaft. With the replacement coupler installed, the play and rattling demonstrated in the video were eliminated. I also show the complete AJ126 supercharger removal process, including protecting the exposed intake ports, removing the upper coolant Y-pipe, releasing the supercharger belt, dealing with the rear wiring and brackets, disconnecting the throttle body and MAP sensor, and removing the supercharger from the engine. While this project is being performed on a Discovery 5, much of the supercharger work applies to other Jaguar Land Rover vehicles using the AJ126 3.0L Supercharged V6. Some applications, including certain Range Rover Sport and Jaguar models, have additional hardware such as the intake sound symposer that must be disconnected during removal. 🔧 In this episode: 🧊 Removing the supercharger intercooler 🛡️ Protecting the exposed engine intake ports 🔧 Removing the upper coolant Y-pipe ⚙️ Releasing the supercharger drive belt 🔌 Disconnecting the rear supercharger wiring and MAP sensor 🌬️ Removing the throttle body and supercharger assembly 🔍 Inspecting the factory supercharger snout coupler 🛠️ Opening and cleaning the supercharger snout ⚙️ Replacing the factory spring coupler with a solid coupler 🧴 Applying new flange sealant and following the factory tightening sequence 🛢️ Extracting and replacing the supercharger oil 📏 Measuring the extracted oil before refilling 🚙 Differences between Discovery 5 and other JLR AJ126 applications ➡️ Setting up Part 3: cooling-system component replacement With the supercharger serviced and out of the way, Part 3 moves into the main cooling-system work: replacing the rear crossover pipe, thermostat housing, water pump and water-pump pipe, along with the associated coolant hoses and other components. ℹ️ Parts & Tools Used for This Project Parts: Upper and lower crossover pipe P/Ns: LR186859, LR186917 - Use genuine if you can afford it! But if you must go aftermarket, this seems to have good reviews vs cheaper options: https://link.amazon/B0j8NWfn5 Rear crossover pipe (V8): https://link.amazon/B082D4AlX Rear crossover pipe (V6): https://link.amazon/B0770S1EK Brass elbow with notch (reuse factory o-ring!!!): https://link.amazon/B0iR5goBf Metal thermostat (V8): https://link.amazon/B08nxKylt Metal thermostat w/ wire (V6): https://amzn.to/3Snd7Q5 JLR water pump P/N: AJ813909 Metal water pump pipe: https://link.amazon/B03lff0di Silicone hoses: From @swallowsracing Supercharger gaskets (V6): https://link.amazon/B04CsgUjr Tools: Fan clutch removal tool: https://link.amazon/B04FdgCP4 Hose clamp compressor set: https://link.amazon/B0awiQ5Fi Blind box ratchet (perfect for rear crossover pipe): https://link.amazon/B0curK312 Torx bit set: https://link.amazon/B04cnCXiL 2-in-1 1/2"/3/8" breaker bar: https://link.amazon/B03CIIZie Coolant pressure test and vacuum fill kit: https://link.amazon/B0cRPSSKR Loctite silver anti-seize: https://link.amazon/B03maZSRD Gasket remover: https://link.amazon/B06QIY16B Loctite 518: https://link.amazon/B04mf4iNn Plastic scrapers: https://link.amazon/B0bQ8OKR1 Some links above may be affiliate links. I may earn a commission from qualifying purchases at no additional cost to you. Everything shown was purchased by me unless otherwise stated. ℹ️ Chapters 00:00 Intro / Part 2 00:28 Intercooler Removal 03:41 Upper Y-Pipe & Supercharger Belt 05:19 Preparing the Supercharger for Removal 07:39 Removing the AJ126 Supercharger 11:52 Supercharger Snout Disassembly 14:25 Installing the New Coupler 20:53 Supercharger Oil Change ⚠️ DISCLAIMER: This video documents work performed on my own vehicle and is intended for informational purposes. Supercharger and cooling-system configurations, procedures, torque specifications, fluid quantities, parts compatibility and required disassembly can vary between Jaguar Land Rover vehicles, engines, model years and markets. Verify compatibility and refer to the appropriate factory service information for your specific vehicle before performing any repairs or maintenance.