Can anybody please help? I have this diesel leak at the rear left-hand side of the engine bay it has been into three different garages. They’ve all said they fixed it and within a day or two is leaking again. I have had new leak off pipe new seals and the injector pipes checked to make sure they’re all tight and yet the problem is still there. It only seem to happen when the engine is under load when it is idling it does not leak from anywhere. If anybody has any experience of this if they could please let me know what it could be I would be most grateful at the moment it’s starting to cost me a small fortune not only in diesel but Garage bills as well.

have you searched the forum first - odd to lose diesel - use UV dye to find the leak

https://www.ringautomotive.com/en/product/RLD4

Hi pcourtney

I have had a look on various forums but can’t see anything about diesel leaks just plenty on oil 🙄

Just a thought as I had something similar,

Mine was caused by the leak off pipes - but - when the pipes were replaced they used some general purpose fuel pipe and cut it to length to re-make the leak off assembly.

Upshot was: the pipe reacted with the diesel and become very brittle very quickly and failed again.

Might be worth finding out if they replaced your leak pipe off with a genuine assembly or just spliced in a bit of fuel pipe. Previous life - 2012 L320 SDV6 - Got divorced, say no more!
Previous life - 2014 L494 SDV6 - Got nicked, without keys, watched it go !
The Duchess - 2007 L322 TDV8 3.6 Autobiography with 270K miles on the clock
The Bonkers One - Audi SQ7 V8 4L TT - It will pull your face off.

Hi Nick. It was replaced with a genuine leak off pipe from Landrover. I’ve had the seals replaced twice as well but still have the leak. It’s frustrating as it only seams to leak when driving as nothing is showing when idling

Hi Killjoy, I had a similar issue on my L320 TDV6. The fuel consumption increased from 28 to 16 mpg and diesel was leaking at one of the cylinders. The issue was related to the return of excessive diesel after the injector back to the diesel pump. Possibly the root cause was a clogged return in the diesel pump, which made the pressure increase in the return pipe. The fix was to increase the diameter of the hole for the return.

Might it be coming from the the water sensor connection at the base of the fuel filter ?
See my post of some weeks ago - https://www.fullfatrr.com/forum/topic71055.html

I tried a couple of different types of replacement viton washers.
Whilst these reduced the leak rate of flow from a near torrent to an occasional droplet at engine idle, once on the move a noticeable leak became evident once more.

A Bluetooth endoscope can be really handy for tracing the source of a problem of this sort.


Warwick 2011 L322 TDV8 A/b Orkney Grey
2008 Defender 90 XS TDCi Java Black
2002 L322 TD6 Vogue Zambezi Silver (gone but not forgotten)
And one or two bikes - Ok, maybe more than one or two....

Thanks for that. I have found this on Maltings website
https://maltings4x4store.co.uk/filter-hous...-lr072685/

Mmm, that's interesting. When I contacted (Duckworths I think), they reckoned that nothing like this was available.

Subject to how I get on with the various bits and pieces I've accumulated thus far I might consider one of these.

Lot of money though for a plastic screw cap, a plug connector and a few bits of wire....

Warwick 2011 L322 TDV8 A/b Orkney Grey
2008 Defender 90 XS TDCi Java Black
2002 L322 TD6 Vogue Zambezi Silver (gone but not forgotten)
And one or two bikes - Ok, maybe more than one or two....

It’s true it is a lot of money for what it is but it is a genuine part and after all these motors aren’t called money pits for nothing

I have used Maltings a few times now and I would recommend them as the guys there are really helpful and the do a loyalty scheme that gives you discount on purchases and you can have a trade account even if you aren’t in the trade so to speak.

There is another dealer that I’m going to try tomorrow called Keith Gott LandRover near Alton they have been helpful in the past as well, especially when I wanted the o rings for the injector leak off pipe as I was told by my local LandRover dealer that the o rings only come with the pipe and it would cost me nearly another £180 but these guy had the rings on the shelf and it only cost me £12 for the 4

It’s true it is a lot of money for what it is but it is a genuine part and after all these motors aren’t called money pits for nothing

I have used Maltings a few times now and I would recommend them as the guys there are really helpful and the do a loyalty scheme that gives you discount on purchases and you can have a trade account even if you aren’t in the trade so to speak.

There is another dealer that I’m going to try tomorrow called Keith Gott LandRover near Alton they have been helpful in the past as well, especially when I wanted the o rings for the injector leak off pipe as I was told by my local LandRover dealer that the o rings only come with the pipe and it would cost me nearly another £180 but these guy had the rings on the shelf and it only cost me £12 for the 4

My similar diesel leak came from a mis-aligned fuel filter, just re-fitted it properly.
Sometimes it's the simple things. RR owner

When you say back left of the engine, are you looking from the front?
Only diesel leak I’ve had was on the D4 and it was from a broken water in fuel sender (iirc) I just blanked off the hole.

I would check all round the fuel filter housing and see if it’s from there as a starting point, then the injector pipework, and fuel pressure sensors in the rails, I think the one for the drivers side bank is at the drivers rear. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
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it's just a Ford Transit diesel fuel filter housing - ebay £35 to £40 quid

Diesel Fuel Filter for Ford Transit Mk7 2.2 2.4 3.2 TDCi Part Number 1685716

or Diesel Fuel Filter Housing for Ford Transit Diesel Van 2.2 2.4 3.2 Part 6C119155BE