I want to do an oil change, and change the air and fuel filters on my 2005 Discovery 3 TDV6. Where are the oil, air and fuel filters? Does the fuel filter just unscrew from its fixing before screwing a new one back on? Or does the fuel system need bleeding afterwards? Michael Draper, St Ives, Cambridgeshire
The oil filter is mounted on the engine. Take off the top engine cover and you’ll see the black filter housing cap that needs unscrewing. Loosen this before you drain the oil so that the filter housing will empty as well.
The air filter housing is mounted on the left-hand (as you look at the engine from the front) inner wing. Undo seven screws to take the top housing off.
The fuel filter is on the right-hand chassis leg under the engine: undo just one nut and bolt to remove it from the clamp plate. There are four pipes on the filter: you need to make sure they go back to the right positions. Press the small lug on each side of the pipe to pull the pipe off.
Once the new filter is fitted, it does need to be bled. First, locate the bleed pipe at the back of the engine on top. Remove the dust cap, turn the ignition on and press the inner valve so that air and diesel are bled through it. Repeat four times until no more air escapes. Use absorbent cloth to soak up the diesel; dispose of the cloth at your local tip. Andrew Varrall