Thread: TD5 additional fuel filtration/ 2nd fuel filter.

After hearing a range of discussion from various forums around and how difficult the job was, I decided I'd just do it.

Which ever housing and filter element you choose is up to you.
I used a 300tdi housing which fits a std TD5 fuel filter.
Reasons:
I had 2 lying around and filter elements are easily sourced and interchangeable with the original.

Choose where/how you want the extra filtration to function.
Either before the original or after the original unit.
I chose before the original.
Because of my mods it worked best for physical location to the water sensor wiring, to be a pre filter (upstream of the main unit)
The water sensor is in the first filter element.


The second fitting on the right is the LP out feed.
I used an original push fitting barb from an old damaged line with some 8mm Fuel injection hose.

The hose is rated to 685kpa (close enough to 100psi)
The LP feed is 30psi.
Disconnect the original fitting and connect the new barb to the 5/16 hose, then connect to the fuel pump.

Run the new hose to the inlet side of the new filter housing and run the return/outlet hose back to the pump.
I used the 90 degree fitting from the same damaged line for the connection back to the original hose.



If you want the filtration after the original filter just simply do the same thing with the first fitting on the right of the fuel pump.
This is the LP return line.
It's very quick job on the trayback.
Easily disconnected and returned to factory for whatever reason.

Nb*
This only on the LP side of the pump in either case so don't stress about the HP function.

If you're doing it on a Disco you don't need to drop the fuel tank or pull up the floor. You can achieve the same result by using the quick connects at the original filter housing.

Originally Posted by djam1

Well done while i have never seen a TD5 fail due to inadequate filtration but it seems like a good idea.

I've only heard of it once, way back in '99.

My mate that was a consultant engineer to LRA said a D2 had lunched the injectors due to a bad batch of fuel and LRA were picking up the tab.
It had done all five injectors, and IIRC LRA's cost was around $1500 each.

His idea at the time was what Mark has done.