Thanks in advance to anyone who reads this and has any thoughts that might help. I have a 1988 Range Rover Classic. Started life as an EFI Petrol, but it's been engine swapped for a 200TDI.

I recently had the fuel tank replaced, and since the tank no longer has a hole in it, it's been struggling for air and building up a vacuum in the tank. Today I've had the rear panels off as I was pretty confident the breather was blocked. It was, but the way it was set up was less than ideal.

It was basically a bit of 6mm ID hose with a one way valve pushed into it, a stretch of copper pipe which was too narrow for the hose, then another hose which then splits into three, all of which run down and were resting on the top of the tank. No filter between the ragged, cut hoses on top of the tank, and the diesel in the tank.



So my new plan is to replace it with something simpler and better.

I'm thinking:
- Run a 6mm ID hose from the filler neck along the same route it currently takes
- Put a filter on the end of it to stop crap getting into my shiny new tank.

Has anyone done anything similar?
Any suggestion for what type of filter I should use?

Use the old style paper fuel filters.?
These would be easy to change

Hicap phill said:

Use the old style paper fuel filters.?
These would be easy to change

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I'd wondered about that, and whether the inline fuel filters you can buy would suffice.
My only reservation is that I'm assuming they'd let water through if any got sucked in.

Just had another look. How does that tank breath?
All the pipes are linked up.

Hicap phill said:

Just had another look. How does that tank breath?
All the pipes are linked up.

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I'm not entirely sure how it was meant to work, but when I got to it the three running down the left hand side in that picture were cut off about a meter further on and resting on the fuel tank. So in theory the air should have been pulled up through those, into the fuel return hose / filler neck and down into the tank.

jwrrc said:

I'm not entirely sure how it was meant to work, but when I got to it the three running down the left hand side in that picture were cut off about a meter further on and resting on the fuel tank. So in theory the air should have been pulled up through those, into the fuel return hose / filler neck and down into the tank.

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I would blow them 3 pipes out & re connect to it with a filter( you can get some glass ones that you can take apart)
I can’t see any water getting all the way into the tank.
Wondering why they would have 3 pipes to that connector ??

I’m back home Saturday morning & will find the filter used on the S1.

Hicap phill said:

I would blow them 3 pipes out & re connect to it with a filter( you can get some glass ones that you can take apart)
I can’t see any water getting all the way into the tank.
Wondering why they would have 3 pipes to that connector ??

I’m back home Saturday morning & will find the filter used on the S1.

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It's been suggested it was emissions linked, perhaps a capture can of some sort for petrol that evaporated

I'm thinking of replacing the three with a single hose with a filter on it. The hoses aren't in great condition in places.

This all started because a fuel hose between the tank and the lift pump had a leak which meant air was being sucked in. These are the only bits of hose that haven't been replaced now, so well worth getting some new rubber!

If it's not too much trouble then knowing what sort of filter you've got on the S1 would be great, thank you!

Not near the motor but this is the type fitted.
This one has tails
https://www.speedflowshop.co.uk/inline-fuel-filter-6mm-14-tails-603-804-582-p.asp

Another good site

https://www.fuelpumpsonline.co.uk/pro-filters-5091-c.asp

these type of filters can be taken apart & are easily viewed for crap.
Also some nice breathers on second site but a bit pricey

Thanks very much!

I'd found a similar filter to the first link that I thought looked good on the basis it's serviceable rather than using loads of the single use ones. Decision made, thanks very much for your help!