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Stacey007

Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3741

Second tank how does it work

Hello

On my series it had the second tank under the passenger seat. With the lever RH / LH under the drivers side.

I tried to undo the cap thought it would be solid and to my surprise it opened. It had the same style filler as the car that pulls out (up).

My question...the fuel gage I guess is my normal tank. If I switch over to the other tank using the level does it use the fuel from their also? As I moved the lever to LH and the fuel level still read the same? Yet there is no fuel in the extra tank.

It looks immaculate inside but I have not put anything in to see if it leaks etc..

Would I need another fuel gage? I'm confused 😲

Click image to enlarge

14th Apr 2020 5:18pm

Huttopia

Member Since: 23 Feb 2016
Location: West Midlands
Posts: 1972

That looks cool. It looks like it has a sender unit in it. If you fill the tank you normally use, does the gauge read full?

14th Apr 2020 5:39pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17307

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

That is the style of twin-tank set-up used on military Land-Rovers, and you should find that the changeover switch has an electrical switch on the back, so that the fuel gauge reads the sender from whichever tank the feed is being taken from.

Effectively you have two independent tanks, you are only ever using one, determined by the position of the switch. They are not linked and you fill them independently. Simple, robust, reliable, just like Land-Rovers used to be.

14th Apr 2020 5:52pm

Stacey007

Member Since: 25 Sep 2015
Location: Cheshire
Posts: 3741

Hello

Thanks my series is a safari model with seemingly quite a few 'options' 👍

I did move the switch over to the other tank and switched the ignition round, didn't start the car. The fuel gage read the same as the normal tank, but there is no fuel in the left hand tank.

Thanks

14th Apr 2020 6:46pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17307

It may be that whoever fitted the tank didn't connect up the sender, or it may even be that the change-over tap doesn't have the switch attached, it rather depends who fitted the tank and how good a job they did. It might be worth looking at the back of the change-over tap to see what if anything is there.

14th Apr 2020 7:04pm

Racedriver

Member Since: 24 Jan 2019
Location: Buckinghamshire
Posts: 113

2015 Defender 110 Puma 2.2 USW Indus Silver

I suspect it would be simpler to fit a second gauge rather than trying to get the original to work with both sides. Or use the side without the gauge first, always keeping the other side as reserve.

18th Apr 2020 5:38pm

Supacat

Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018

2013 Defender 110 Puma 2.2 XS DCPU Keswick Green

Much depends on who put it in and what they put it in for with regard to the plumbing.

Mine worked just as Blackwolf described, but when I put a diesel engine in the fuel return only ran to one tank. After fuelling both tanks you had to be very careful to run from the return tank first, and make space for returning fuel from the 2nd tank before changing over.

19th Apr 2020 8:39am

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