Disclaimer the contents of this video are strictly for entertainment only and in no way should they be used as a form of instruction or guide. Work on any car should only be undertaken by those with the skills and competence to do it safely. Full Fat 4x4 has no affiliation whatsoever with any of the links below.

If you are looking to tackle any job on your 4.4 TDV8 (or any other JLR car!) the Land Rover Classic parts is a great resource with really good technical diagrams to help you pin down what you need: https://parts.jaguarlandroverclassic....

If you are planning on replacing the oil cooler I'd recommend using a good quality replacement component (same can be said about any job!) the "Genuine Land Rover" part at cost of @£400+ is labeled "Mann + Hummel" so if you can find one of those for a sensible price great. Otherwise there is always Nissens: https://maltings4x4store.co.uk/oilco...

If you are doing this job its worth preparing yourself with the pipe section that goes from the cooler to the EGR as the fastner/seal in the fastner to the oil cooler housing: https://maltings4x4store.co.uk/coolan...
If you don't want to buy the whole component the Oring that is likely to have perished has an ID of 17mm and a cross section of 2.5mm and is available here: https://www.ebay.co.uk/itm/141455807142?

The orings needed for the oil feed tube to the rear of the housing are Viton BS611 8.73mm Internal Diameter (ID) x 1.78mm Cross Section (C/S) plenty of suppliers out there I used these guys: https://www.ebay.co.uk/itm/142614191098

If you are looking for guidance on how to do a certain job there is no better place than the FullFatRR forum: https://www.fullfatrr.com/wiki/Main_Page toward the bottom of that page is links to download the workshop manuals of various year Range Rovers.

If you want to learn more about Range Rover maintenance check out Matt at ‪@HighPeakAutos‬ video about what can go wrong:    • Video