GX550 fuel tank in a Land Cruiser

[Wraith272]

The tanks are indeed different shapes, but the only "non-fit" area was what I out lined, otherwise it looked like it was going to fit, just needed to be slid back a bit to get the tank straps to line up.

From your picture comparing the two tanks, it looked like the distance from the fuel pump mounting ring to the part of the LC tank where it slopes steeply for the suspension linkage pocket might be the same distance as it would be to the back of the GX tank.

You mentioned that you had to slide the GX tank back a bit to get the straps to line up, could that be the cause of the interference?

If you line up the fuel pump mounting ring on the GX tank to the hole in the floor and move the strap location instead would it fit?

 

[EOD Guy]

From your picture comparing the two tanks, it looked like the distance from the fuel pump mounting ring to the part of the LC tank where it slopes steeply for the suspension linkage pocket might be the same distance as it would be to the back of the GX tank.

You mentioned that you had to slide the GX tank back a bit to get the straps to line up, could that be the cause of the interference?

If you line up the fuel pump mounting ring on the GX tank to the hole in the floor and move the strap location instead would it fit?

The issue is: In order to line up the GX tank to the hole and fit in the contour of the floor, the tank must move backwards about 2-3"

 

[Obioban]

I second the UAE is hybrid and non hybrid. Somewhere I thought there was a video explaining the Hybrid still had the 29 gallon tank. Of course they could have been wrong. But from my limited knowledge, exploring the UAE angle (because it's also hybrid) would be of high priority.

If there is a factory 29 gallon setup on a 2.4 hybrid, that clearly seems like the way to proceed.

 

[Winchester44]

They have added some great photos. Really shows how exhaust would need modifications.

No information on adaptability to hybrid yet. Expect diesel to be the priority as that is most of the market. Still exciting?

TOYOTA LANDCRUISER PRADO 250 SERIES – 75L SUB-TANK REPLACEMENT LONG RANGE FUEL TANK – Brown Davis- Long Range Fuel Tanks, Underbody Protection, Roll Cages and Motorsport

www.browndavis.com.au

 

[Winchester44]

If there is a factory 29 gallon setup on a 2.4 hybrid, that clearly seems like the way to proceed.

My research indicated the UAE 2.4 petrol hybrid gets same micro tank as North America, but their 2.4 non hybrid petrol gets the dual tank 29 gallon set up.

 

[MAC25LC]

Looking at photos of the under carriages, the only thing I'm unsure on is if the Hybrid motor/mount is going to interfere. Don't know how the Lexus dealer would feel about me rolling under one with a tape measure and taking pictures...... might just have to find out.....LOL

Do it on a Sunday when they are closed.

 

[EOD Guy]

Do it on a Sunday when they are closed.

No need, I purchased a GX tank, pulled the LC tank and the GX tank is not a direct bolt in. The LC has 4-link bars (well 2 of the 4) and the passenger side link mount is in front of the rear axle. The LC's tank has a void molded into the tank to clear the mount. The GX tank doesn't because it doesn't use a 4 link system like the LC so the tank hits the LC mount.

 

[Q8_250]

Our version of the LC250 and in general in the middle east we don't have hybrid version, instead it's a 110 Litre fuel capacity (80 Litre main tank, 30 Litre subtank).
But is it worth the trouble to increase your fuel tank capacity?

 

[Lectro]

No need, I purchased a GX tank, pulled the LC tank and the GX tank is not a direct bolt in. The LC has 4-link bars (well 2 of the 4) and the passenger side link mount is in front of the rear axle. The LC's tank has a void molded into the tank to clear the mount. The GX tank doesn't because it doesn't use a 4 link system like the LC so the tank hits the LC mount.View attachment 41278

Are there any further developments with fitment attempts?

Thanks

 

[EOD Guy]

Are there any further developments with fitment attempts?

Thanks

Not Yet, too many projects, not enough time......LOL

 

[Lectro]

Not Yet, too many projects, not enough time......LOL

Story of my life too. Lol. Was the suspension mount interference the only mounting issue you encountered? I’m tempted to order a tank too and break out my heat gun. I’ll need to decide fast because the midwest winter is fast approaching.

 

[EOD Guy]

I ordered almost every single part for the GX fuel tank, fuel lines, bolts, skid plate, brackets and heat shields.

When we dropped the LC's tank and compared them side-by-side I observed the following:

Skid plate wasn't exactly the same, but the stock LC would easily fit the GX tank, so the GX brackets and bolts weren't needed.

The heat shield seemed almost exactly the same, but the plastic fasteners would probably break so I chose to just install the new shields with new fasteners on the GX tank as the costs were minimal.

The GX fuel line wasn't installed/routed the same as the LC fuel line, while it didn't fit into the GX's tank pre-molded channels exactly, it fit good enough and the connectors on both tanks were exactly the same.

The only real part that had to be modified was the locking ring spacer on the LC's fuel pump, the pump was the same but the LC's locking ring spacer/wiring clip/bracket (hard to explain) couldn't be fastened properly so with the Toyota tech's concurrence, we cut the obstructing part off. After we discovered the GX tank wasn't going to fit, we basically just RTV'd the part we just cut off back into place as it was more of a spacer than a fastener. Part 18 in the diagram, they looked the same in the GX and LC parts diagram so one was never ordered but they aren't the same I assume it was due to the recess in the GX tank.

I want to be transparent...... we never got the GX tank fully installed and had to stop when the suspension obstacle prevented any further progress.

 

[Lectro]

I ordered almost every single part for the GX fuel tank, fuel lines, bolts, skid plate, brackets and heat shields.

When we dropped the LC's tank and compared them side-by-side I observed the following:

Skid plate wasn't exactly the same, but the stock LC would easily fit the GX tank, so the GX brackets and bolts weren't needed.

The heat shield seemed almost exactly the same, but the plastic fasteners would probably break so I chose to just install the new shields with new fasteners on the GX tank as the costs were minimal.

The GX fuel line wasn't installed/routed the same as the LC fuel line, while it didn't fit into the GX's tank pre-molded channels exactly, it fit good enough and the connectors on both tanks were exactly the same.
View attachment 51030
The only real part that had to be modified was the locking ring spacer on the LC's fuel pump, the pump was the same but the LC's locking ring spacer/wiring clip/bracket (hard to explain) couldn't be fastened properly so with the Toyota tech's concurrence, we cut the obstructing part off. After we discovered the GX tank wasn't going to fit, we basically just RTV'd the part we just cut off back into place as it was more of a spacer than a fastener. Part 18 in the diagram, they looked the same in the GX and LC parts diagram so one was never ordered but they aren't the same I assume it was due to the recess in the GX tank.

View attachment 51023

I want to be transparent...... we never got the GX tank fully installed and had to stop when the suspension obstacle prevented any further progress.

Was there space up front (at the crossmember)? The hybrid chassis has the crossmember further back due to transmission being further back.

Thanks for info.

 

[EOD Guy]

Was there space up front (at the crossmember)? The hybrid chassis has the crossmember further back due to transmission being further back.

Thanks for info.

There didn't appear to be any interference at the forward end (if I remember correctly) it was only the suspension mount that prevented us from completing any further fitting.

 

[Winchester44]

I ordered almost every single part for the GX fuel tank, fuel lines, bolts, skid plate, brackets and heat shields.

When we dropped the LC's tank and compared them side-by-side I observed the following:

Skid plate wasn't exactly the same, but the stock LC would easily fit the GX tank, so the GX brackets and bolts weren't needed.

The heat shield seemed almost exactly the same, but the plastic fasteners would probably break so I chose to just install the new shields with new fasteners on the GX tank as the costs were minimal.

The GX fuel line wasn't installed/routed the same as the LC fuel line, while it didn't fit into the GX's tank pre-molded channels exactly, it fit good enough and the connectors on both tanks were exactly the same.
View attachment 51030
The only real part that had to be modified was the locking ring spacer on the LC's fuel pump, the pump was the same but the LC's locking ring spacer/wiring clip/bracket (hard to explain) couldn't be fastened properly so with the Toyota tech's concurrence, we cut the obstructing part off. After we discovered the GX tank wasn't going to fit, we basically just RTV'd the part we just cut off back into place as it was more of a spacer than a fastener. Part 18 in the diagram, they looked the same in the GX and LC parts diagram so one was never ordered but they aren't the same I assume it was due to the recess in the GX tank.

View attachment 51023

I want to be transparent...... we never got the GX tank fully installed and had to stop when the suspension obstacle prevented any further progress.

You sir are a gold mine of information! Thank you. What's your guess on what this molded in void is for? Routing a line? Extra rigidity? Better Sloshing/Pickup? Deliberate Reduced Capacity?

 

[EOD Guy]

You sir are a gold mine of information! Thank you. What's your guess on what this molded in void is for? Routing a line? Extra rigidity? Better Sloshing/Pickup? Deliberate Reduced Capacity? View attachment 51307

Could be everything you listed.......LOL who knows. If I had to guess, I'd say for strength but even that doesn't seem plausible. Anti sloshing, it isn't shaped correctly. Reduced capacity, It cost more to put it there than to leave it out.

 

[Winchester44]

Could be everything you listed.......LOL who knows. If I had to guess, I'd say for strength but even that doesn't seem plausible. Anti sloshing, it isn't shaped correctly. Reduced capacity, It cost more to put it there than to leave it out.

Agree it’s so bizarre.

 

[Richard B]

I think the American parlance is auxiliary tank but the rest of the world calls it a “sub tank” . I looked around to try and find out what the part number is and what Toyota actually calls it but I’ve had no luck yet. Very curious to see where it actually gets installed. On the LC 300 it sits just on the other side of the drive shaft close to the exhaust. I believe there has been some confusion as the prior generation Land Cruiser Prado did have multiple fuel tank options one of which required a tailgate mounted spare tire to free up room for a massive tank where the spare tire normally is. However, that was just one configuration. I think they called extended range package. However, most of them still had both a main and sub tank even with the tire mounted in normal place between the rails. Moving onto the new current generation Prado that is called the Land Cruiser here it also has the main tank in the sub tank and people overseas are complaining that there’s not a provision to spare on the tailgate. So there should be room for a sub tank under there even with the spare tire place. One giant caveat all of the above those are all diesels and ours is gas. I’m not sure how easily a diesel tank and associated plumbing can be converted to use gasoline.

I think you will find the word sub tank is generally used By OEM or at least toyota anyway, the term Auxiliary is generally used by aftermarket all over the world including Australia for last 45 years, these tanks were design back in the early 80's Toyota Landcruiser 40-Series | The Long Ranger

 

[Lectro]

There didn't appear to be any interference at the forward end (if I remember correctly) it was only the suspension mount that prevented us from completing any further fitting.

In another post, you mentioned that the GX tank has to be slid back to fit into LC’s floor recess. If that’s the case, this swap might be too much for most. I might go the 4runner tank route. Only an extra gallon, but that’ll do for me.

 

[EOD Guy]

In another post, you mentioned that the GX tank has to be slid back to fit into LC’s floor recess. If that’s the case, this swap might be too much for most. I might go the 4runner tank route. Only an extra gallon, but that’ll do for me.

For clarity........... There is a void in the LC's tank that isn't there in the GX's tank, that prevents the GX tank from settling into the LC's recesses.