Maintenance :- Fuel Filter          

Another of the most important Jobs on your TD5 is to replace the Diesel fuel filter. This will ensure you have the "cleanest" possible fuel going into your engine and hopefully help it run at its best.

The Fuel filter on the TD5 Disco is located by the rear right hand wheel under the arch, its probably not the most " ideal" location as far as off roading goes, but it does make it easy to get to to change it.

The Fuel Filter also incorporates a water sensor to warn the driver if there is to much water in the fuel by illuminating a light on the dash.

Changing the filter is a simple task, first you  have to disconnect the multi plug from the bottom of the water sensor

Due to my little ventures off road, the water sensor plug was a bit dirty, so I took the opportunity to give it a good clean out with some WD40.

Next just unscrew the filter from its housing, you will get some fuel spillage, so its a good idea to have a bowl or some sort of container underneath to catch the fuel.

The filter will still be full of fuel even after the initial spillage, so be careful not to turn it upside down or drop it etc.

Once the filter is out, give the mounting face a wipe with clean rag or tissue

Now you have it out, you have to unscrew the water sensor from the bottom of the filter itself, be careful when doing this, its only made of plastic and they have been know to break off.

Again I used genuine parts for replacements, the new filter comes with a new "o" ring that fits onto the top of the water sensor, also ensure the new filter itself has an "o" ring in the top of it.

Fit the new seal to the water sensor and screw it into the bottom of the new filter, but only hand tight, do not over tighten it as it will shear off!!

NOTE :- The filter should only be fitted with "1" seal at the top onto the fuel filter housing, it is not uncommon to have a seal stuck on the filter housing when the filter is removed either from the one you have just removed or from a previous filter change, so check and make sure there is only 1 seal as 2 can often cause the filter to leak.

Next, because any diesel will not run with air in its fuel system, and we have "opened" up the system, its best to fill the new filter with some fresh clean fuel before screwing it back into place, this will help the "bleeding" process much better and get the air out of the system quicker.

 Again this is only hand tight !!!. Once the new filter is in place, reconnect the water sensor multi plug and that's all done.

Now we have to get the car to run again by getting all the air out of the fuel system. There is an "official" bleed procedure in the manual which I will include below, but I will tell you what I had to do to get it to run.

1. Switch on the car ignition and leave it for at least 1 min, you will hear the air in the system when the fuel pump is running.

2. Turn of the ignition again and wait for 30 secs.

3. Switch the ignition back on, leave for 30 secs, then fully depress the accelerator pedal, and start to turn the engine over, as soon as it starts to go, release the starter switch and accelerator pedal,

4. leave the car running for a few minutes and check for leaks.

NOTE, DO NOT "CRANK" THE ENGINE FOR MORE THAN 30 SECONDS AT ANY ONE TIME.  If the car fails to start, then either repeat what I did, or follow the full procedure below.


Full Workshop Procedure Below :-

If the vehicle runs out of fuel, or the fuel level is so

low that the fuel system draws air into the fuel rail,

the fuel rail will need to be purged before the engine

will start. This can be achieved by following the

procedure below.

If this procedure is carried out on a vehicle that

has not run out of fuel or otherwise drawn air into

the fuel rail, it can lead to the engine flooding and

failing to start.


1. Turn the ignition switch off and wait 15


2. Turn the ignition switch to position II and wait 3

minutes (this ensures that the fuel system

purges all the air from the fuel rail within the

cylinder head).

3. Fully depress the throttle pedal.

4. Keeping the throttle pedal fully depressed,

crank the engine.

5. As soon as engine speed exceeds 600 rev/min,

release the throttle pedal and the ignition

switch.The engine must not be cranked

continuously for more than 30 seconds at

any one time.

6. If the engine fails to start, repeat the above