 | Home > Maintenance & Modifications > Pictures extra fuel tank under seat box Defender 90 |
 
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039   
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The standard tank will fit if you remove the battery box and add the brackets that are on the original tank side to the chassis.
It's a pity you have galvanized and powder coated your chassis already. The funny thing off a td5 chassis is that the brackets for the underseat tank on the rights side are in place so it will be very easy for me to add a second tank. Roel 1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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14th Jan 2015 9:57am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605  
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A 1985 90 will have a underseat tank as standard.
I would fit a Td5 rear tank - but then I would say that as that is the setup on my soft top. Original tank under the seat, linked to a Td5 rear tank.  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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14th Jan 2015 10:01am |
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| Pike Offroad Member Since: 12 Jan 2015 Location: Amersfoort Posts: 11
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I know most people prefer a TD5 tank in the rear, but I don't want to cut or weld the chassis, because it's been galvanised and powdercoated.
Here is a picture of the chassis before it was powdercoated. Both sides seem to have the same brackets. It looks like it's possible to add an extra fuel tank? [URL=] Click image to enlarge[/URL] Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated  |
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14th Jan 2015 12:01pm |
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| davew Member Since: 02 Jan 2012 Location: North Yorkshire Posts: 888  
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A standard tank won't fit under the left hand side because the tank on a 90 is shaped to fit around the front outrigger so isn't symmetrical. You can get tanks designed to go under there (maybe ex military ?). Having said that you could probably get one made up or find an aftermarket one. There are some tanks you can buy that wrap around the battery box, shaped to fill the available space without removing the battery box but these are expensive and fuel capacity is limited.
As others have said, a TD5 rear tank is an easier option and gives more fuel capacity that the underseat tank. It's a shame to have to modify a galvanised chassis but better that than to compromise fuel capacity and reduce interior space with a battery or two. Either way, if you can, you should try and use a corresponding original filler cap/pipe setup. For our front tank (we already had a TD5 rear tank) I used a flush fit aero filler mounted on the side but the lack of an initial drop in the pipe means that filling it is a bit fiddly, especially as it nears full - that's one of the things I want to improve on ours at some point. A fuel changeover solenoid is a far better option that connecting tanks together, especially for overland use. Putting a hole in a tank or getting some other kind of leak is bad news in one of your fuel tanks but when that leak can effect all your tanks thanks to balance pipes... We had a fuel leak on the main tank during our trip around Australia, being able to switch over to an independent auxiliary tank and drain fuel out of the main was a real bonus in that situation. Getting bad fuel in one of the tanks also meant we could isolate that tank so where we could we only filled one tank at each filling station and even with a TD5 you can change tanks over on the fly without the engine missing a beat using a switch on the dash. http://www.yorkshireoffroadclub.net/ |
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14th Jan 2015 12:43pm |
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| Pike Offroad Member Since: 12 Jan 2015 Location: Amersfoort Posts: 11
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I've read about bolt on brackets for holding the TD5 fuel tank.
But do I have to cut the crossmember? |
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14th Jan 2015 1:19pm |
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| davew Member Since: 02 Jan 2012 Location: North Yorkshire Posts: 888
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I don't think you'd need to cut the cross member, no. With the chassis fully accessible as yours is at the moment, you could probably make a bolt in cradle that utilises existing bolt holes and positions. The tank on a 90 (unlike the 100 version) isn't attached to anything as such, the cradle just gives it a platform to sit on and the back body floor acts as the lid to the "box" with the ribs under the floor sitting in grooves on the top of the tank. It's just kind of wedged in place !
Make sure you add an access panel in the back body floor so the tank doesn't need to be removed to gain access to the sender unit. http://www.yorkshireoffroadclub.net/ Last edited by davew on 14th Jan 2015 2:20pm. Edited 1 time in total |
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14th Jan 2015 2:03pm |
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| Pike Offroad Member Since: 12 Jan 2015 Location: Amersfoort Posts: 11
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Thanks!
I'm going to look for used a TD5 fuel tank! |
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14th Jan 2015 2:06pm |
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| Pam W Member Since: 25 Oct 2011 Location: North Yorkshire Posts: 1169 
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Just make sure it is a 90 Td5 tank as the 110 ones are bigger and won't fit! Our blog - http://landytravels.com/
Yorkshire Off Road Club - http://www.yorkshireoffroadclub.net |
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14th Jan 2015 2:58pm |
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| Pike Offroad Member Since: 12 Jan 2015 Location: Amersfoort Posts: 11
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I've been looking for a TD5 tank for weeks now
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I can't find one over here. I found one on Ebay UK. http://www.ebay.co.uk/itm/251813911475?_tr...EBIDX%3AIT Is it any good? Do I also have to ask the seller for other parts of the fuel tank that are not in the picture? Thanks! |
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13th Feb 2015 7:22pm |
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| davew Member Since: 02 Jan 2012 Location: North Yorkshire Posts: 888
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That's all you need, looks OK to me.
You'll need a 300TDi discovery sender unit, screw cap and the seals, be good if the screw cap thing for the sender was included in the sale. http://www.yorkshireoffroadclub.net/ |
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13th Feb 2015 7:43pm |
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| davew Member Since: 02 Jan 2012 Location: North Yorkshire Posts: 888
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Just spotted this one...
http://www.ebay.co.uk/itm/Land-Rover-90-TD...463386ee49 Seller is on Landyzone and has a few other bits you might need - he was doing the same as you plan to do by the looks of it so probably worth talking to about a deal. http://www.yorkshireoffroadclub.net/ |
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13th Feb 2015 7:52pm |
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