Fuel Tank Options - 1985 110 SW, 3.5 V8

[GunPilot]

The fuel tank on my 1985 110 (3.5 V8) has a slow leak and is pretty crusty. I am not interested in a repair. I intend to replace it with a new steel tank, but I'm curious if I could "upgrade" to the slightly larger capacity tank (21 gallon) for the NAS 110. My 110 has the external fuel pump and filter mounted on the chassis. The early 110 parts catalogue indicates NRC7570 as the correct fuel tank (18 gallon), which is available from RN. I'm wondering if I could use the same side mounted sender/pickup and external fuel pump on my 110 with the NAS 110 tank, ESR2000, also available from RN and less expensive. I don't know if the 21 gallon tank is dimensionally deeper than the 18 gallon, as this would probably affect using my current sender/pickup. I defer to the collective wisdom and experience of the forum. Has anyone made this change on an early V8 110?

 

[Robert]

Don’t know, but FYI I swapped a steel range rover classic tank for an 85 tank and they seemed to be identical other than the extra hole for the internal fuel pump

 

[JimC]

They’re different? I’m suspect, I’ve got an 87 in my driveway right now in addition to two NAS 110s and I think all those tanks are the same. Now you could put in a big front runner 30 gal tank...

 

[GunPilot]

They’re different? I’m suspect, I’ve got an 87 in my driveway right now in addition to two NAS 110s and I think all those tanks are the same. Now you could put in a big front runner 30 gal tank...

NRC7570 is 18-gallons, while ESR2000 is 21-gallons. Not sure how the extra 3 gallons are accommodated. Width, depth, height? If in depth, the early sender/pickup may not reach deep enough, right?

 

[JimC]

Wow, news to me. I strongly suspect any difference is depth, and yeah, you might need a longer pickup. But they’re really cheap.

 

[pfshoen]

Here's a shot in the dark: Imperial and USA gals are not the same. 18 imp gals is about 21 US. Also, some tanks were made of steel and some plastic. Maybe they got more cap with the plastic?

 

[JimC]

Plastic 110mtanks didn’t arrive until the Td5 era, I think you’re on to something with the imperial gallon conversion.

 

[Defender425]

My 85 110 v8 came with an aux tank in the rear right fender. You fill right through it and I think it's another 10gal or so. Only issue is gauge reads full for a long time until the aux tank empties

 

[pfshoen]

The hopper tank described above is slick. Works easiest with metal tanks with drain plug that's used for the equalizing line. Plastic tanks need a hole drilled.

 

[jymmiejamz]

The hopper tank described above is slick. Works easiest with metal tanks with drain plug that's used for the equalizing line. Plastic tanks need a hole drilled.

I have one of those metal tanks that goes in the wheel well to install in my 110. I haven’t installed it yet mainly because I haven’t bought a fitting to go in the plastic tank. Fwiw, I’m pretty confident the Britpart one I bought is just repackaged Mantec. It looks identical to the Mantec auxiliary tank and the instructions are also identical.

For anyone looking, this is the fitting that came with the Safari Equip tank that I put in my D90. I would love to know what kind of sealing washers those are.

 

[MountainD]

I am swapping my tank on 1991 TDI. I have a new stock tank or my buddy offered up his plastic TD5 tank. Which is preferable? I’m going Cummins r2.8. I’m sure I can figure out ports/feeds/fuel level— the question is which is better reliability wise? If I was to use the new metal tank, should I reseal it first while it’s clean?