Hi folks .... any help would be much appreciated as I've got no more hair to pull out

So I recently renewed the fuel filter for a genuine RR part (so I thought) I did notice that that the water separator at the bottom didn't screw in exactly flush with the bottom of the filter but I thought I'd give it a go anyway. To cut a long story short (several refits) I had fuel leaking from the water separator outlet.
I concluded that the filter was a "repo" so I binned it and bought a Mahle

Mahle duly fitted and problem solved .... no leak

Until now, 3 weeks later I've started with a diesel leak again. Perfectly dry at the top of the filter but now the drip has returned from the outlet at the bottom of the filter.

i'm finding it difficult to believe that the filter "internals" are at fault so I'm left scratching my head

I've read on the forum that maybe I should swap out the housing (big ££ new) but i just can't figure how that would help as the leak is from the bottom of the filter

Do you think i should start with changing the sensor / loom?
I believe it's the same as on the 3.6 TDV8 or I've also seen that it's available as a Ford part. I could buy a SH loom but as they seem to be problematic I would prefer new.

Thanks for your help guys, appreciate it 2011 TDV8 4.4 Vogue SE

You mention that the water sensor connector did not screw in quite flush when fitted to the replacement LR filter.
Is it possible that it might have been cross-threaded d'y think ?

If so, then the connector thread may now be damaged.
I know you said that the problem appeared resolved initially with the introduction of the Mahle filter.
But keep in mind that the fuel pressure at the filter is significant. The seal made by the viton washer inside the connector is dependent on the connector thread.

If the thread has been weakened, then fuel pressure at the washer is likely to be increased. And so over time that pressure may eventually defeat the connector seal.


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 the response KMCF

Yes it's one of the remedies I did consider but when i used the Mahle filter it threaded perfectly and the thread itself looked perfect on the sensor connector ... although I did notice that the knurled part that sensor pushes on to does rotate slightly within the metal cap.

I think the "genuine" Land rover filter was far from genuine

i think the next step may be to replace that component ....... do you happen to know the part number?
So i may as well swap the sensor loom with it.

I'm trying everything before parting with £350 for a new filter housing  2011 TDV8 4.4 Vogue SE

I think I might have a complete housing . Had one bought for my old l322 but it was the 3.6. If they are the same can fire it down .

The part number I have (based on a recent purchase) is LR072610.
A Google search suggests that this is correct.

The sensor must be able to rotate within the knurled cap.
Were it not then it would not be possible to unscrew the nut without twisting the sensor cable.
There is little slack and so with just a few turns out the nut it would start to become stressed and possibly fail.

On a related point, my experience has been that the leak has been from the bleed opening in the knurled cap rather than from the sensor itself.

To my knowledge, the sensor loom is not available separately.

Hope this helps.


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....

Mr Tee wrote:

I think I might have a complete housing . Had one bought for my old l322 but it was the 3.6. If they are the same can fire it down .

Thanks Mr Tee

I believe the housings & filters for the 3.6 & 4.4 are different but the sensor loom is the same.

Just now I'm only looking for a sensor loom.... but many thanks for the offer

for some reason RR no longer sell the loom separately from the complete filter housing on the 4.4 ...... I'll take a wild guess ..... £££££££

From the forum I can see that the 3.6 tdv8 loom is interchangeable with the 4.4
there's also a suggestion that the loom off a transit van will work  2011 TDV8 4.4 Vogue SE

Many thanks Warwick

That part number appears to be for the fuel filter itself. I was looking to replace the screw in knurled metal sensor cap for the bottom

however what you say about the connector being able to rotate within the cap makes perfect sense so maybe it's not the problem. If I could source one though I still think I'd change it just to rule it out

Thanks again 2011 TDV8 4.4 Vogue SE

This is one of the parts I'm looking for ..... if anyone knows where I can find one ?
My search skills are coming up blank atm

Cheers 2011 TDV8 4.4 Vogue SE

Crusty21 wrote:

Many thanks Warwick

That part number appears to be for the fuel filter itself. I was looking to replace the screw in knurled metal sensor cap for the bottom

Thanks again

I’ll be home late pm, will have a root about the garage and see if I can locate .Did try and sell it here years ago , definitely still have it somewhere :

Click image to enlarge

Thanks Mr Tee 2011 TDV8 4.4 Vogue SE

It seems that the knurled water basin that screws into the bottom of the fuel filter (the one that has an attachment for the push on sensor together with an outlet drain) is only available with the complete housing and can't be bought separately

RR don't make it easy

Could it just be the o-ring on the sensor that's leaking?

I changed one recently on a friends 4.4 TDV8 and it didn't come with a new o-ring.

David. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2007 Range Rover Supercharged in Java Black with Ivory Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior

I've changed the washer & filter twice David so i'm pretty confident there is a good seal ..... or at least it's not the fault of the O ring.  2011 TDV8 4.4 Vogue SE