Brown Davis 180L tank leakage / vent issue (2 Viewers)

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Joined
Jan 20, 2022
Threads
1
Messages
5
Location
Middle East
Hi Team

I bought 2020 Land Cruiser V6 GXR Middle East spec. I bought Brown Davis 180L fuel tank (TL200R1) which replaced my 45 liter sub tank.



I have been having some issues with the installation from the get go. Really hoping someone here has experienced this and can help/guide me.

Apparently, the brown Davis tank had two two vents on their 180L tank but when the sub from V6 removed it only had one vent. As such the installation guys here killed one of the vent on the tank.

Secondly, they extended the pipe out from the Y type pipe (situated behind the front passenger tire) and stick it out from the hood. They claimed that higher air pressure required due to bigger tank capacity and the pipe need to be higher in elevation from the tank.

After installation, I filled the tank up 270 liters in total! Both original and new 180L tank filled properly. I drove about 600 KMs back to my hometown and the fuel gauge came down which confirmed that fuel is flowing from sub tank to main tank.

Next morning I am half a tank, I smelled fumes but no visible leakage. I drove for about 20 KMs and when I turned off the car I see petrol leaking from chessy. Turned off the car and it started to slow down and eventually stopped. I immediately contacted the installation guys 600 KM away and they said to remove the Y type stock pipe with the valve from the vent and connect a direct long pipe to the vent hose. I did that and it did not leak. Now I am trying figure out:

1. Why did the fuel came out during half tank? Could the installation guys connected wrong pipes?

2. Why did we have to extend the air pipe and remove the Y type pipe? To me seems safety issue that the valve is not there anymore and since the other end of the pipe is sticking out in the hood what if petrol comes out of it and engine catches fire

3. Is one vent nozzle not enough?

I have a 800KM off-road trip coming and I am concerned that I don’t understand the issue and I will be dunes going up down and it would cause fuel to spill.

Some photos attached

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Looks to me like the item labeled '3' on the BD tank is the 'fast fill breather'. This should be routed up separately to the level of the fuel cap and have a filter or breather vent on it there. In the page you linked the fast fill breather is located in a slightly different location on the tank.

BD instructions should have info on how to terminate the fast fill breather.

The item marked 'x' then becomes '3', one of the two evap in/out along with '4'.

Looks like a nice tank!

<edit - you might also want to pull your evap canister and evaluate it for fuel flooding. If the 'fast fill breather' got fuel in it (a max full tank, for example, could get fuel into that line if it isn't run above tank level), that fuel may have run directly into your evap canister>
 
Last edited:
Tha
Hi Team

I bought 2020 Land Cruiser V6 GXR Middle East spec. I bought Brown Davis 180L fuel tank (TL200R1) which replaced my 45 liter sub tank.



I have been having some issues with the installation from the get go. Really hoping someone here has experienced this and can help/guide me.

Apparently, the brown Davis tank had two two vents on their 180L tank but when the sub from V6 removed it only had one vent. As such the installation guys here killed one of the vent on the tank.

Secondly, they extended the pipe out from the Y type pipe (situated behind the front passenger tire) and stick it out from the hood. They claimed that higher air pressure required due to bigger tank capacity and the pipe need to be higher in elevation from the tank.

After installation, I filled the tank up 270 liters in total! Both original and new 180L tank filled properly. I drove about 600 KMs back to my hometown and the fuel gauge came down which confirmed that fuel is flowing from sub tank to main tank.

Next morning I am half a tank, I smelled fumes but no visible leakage. I drove for about 20 KMs and when I turned off the car I see petrol leaking from chessy. Turned off the car and it started to slow down and eventually stopped. I immediately contacted the installation guys 600 KM away and they said to remove the Y type stock pipe with the valve from the vent and connect a direct long pipe to the vent hose. I did that and it did not leak. Now I am trying figure out:

1. Why did the fuel came out during half tank? Could the installation guys connected wrong pipes?

2. Why did we have to extend the air pipe and remove the Y type pipe? To me seems safety issue that the valve is not there anymore and since the other end of the pipe is sticking out in the hood what if petrol comes out of it and engine catches fire

3. Is one vent nozzle not enough?

I have a 800KM off-road trip coming and I am concerned that I don’t understand the issue and I will be dunes going up down and it would cause fuel to spill.

Some photos attached

View attachment 2899789

View attachment 2899790

View attachment 2899791

View attachment 2899792

View attachment 2899793

View attachment 2899794

View attachment 2899795

View attachment 2899796

View attachment 2899797

View attachment 2899798
Looks to me like the item labeled '3' on the BD tank is the 'fast fill breather'. This should be routed up separately to the level of the fuel cap and have a filter or breather vent on it there. In the page you linked the fast fill breather is located in a slightly different location on the tank.

BD instructions should have info on how to terminate the fast fill breather.

The item marked 'x' then becomes '3', one of the two evap in/out along with '4'.

Looks like a nice tank!

<edit - you might also want to pull your evap canister and evaluate it for fuel flooding. If the 'fast fill breather' got fuel in it (a max full tank, for example, could get fuel into that line if it isn't run above tank level), that fuel may have run directly into your evap canister>
Thanks a lot for responding!

Looks like there are two fast bill breather. One on the top of 1 and other on the side that number 3 you referred to.

See step 6 below marked with yellow circles:


If that is the case then I am guessing the other one must be connected at higher level. Will have to lift the car to verify.

Thoughts?
 
X and 4 should be connected to evap. These will have pipes in the tank that are designed for evap.
3 is the fast fill breather and should be connected to nothing above filler level, or y into the vent behind the gas cap at the filler, I would ask brown Davis what they recommend.
You can also verify with them the purposes of each fitting since your photo varies from the manual.
 
I have reached out to Brown Davis and awaiting to hear back.

I got underneath the car and took more pics and clips to show how they are connected. Please have a look.

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Yeah, that’s as you described. Depending on what BD says, you’ll probably have to drop the tank and correct the routing. It is also pretty likely your evap canister got flooded as well, so you may have to look into that, I think it is located at the front of the main tank.
 
Interesting. They're the manufacturer, so I guess you follow the recommendation?
What is #3 doing in that diagram? Is it #1 and #3 connect to the main tank vent and to evap input?
Here is how a different manufacturer does it, no fast fill valve on this tank.

Screen Shot 2022-01-28 at 11.46.02 AM.png
 
Yeah, that’s as you described. Depending on what BD says, you’ll probably have to drop the tank and correct the routing. It is also pretty likely your evap canister got flooded as well, so you may have to look into that, I think it is located at the front of the main tank.
Interesting. They're the manufacturer, so I guess you follow the recommendation?
What is #3 doing in that diagram? Is it #1 and #3 connect to the main tank vent and to evap input?
Here is how a different manufacturer does it, no fast fill valve on this tank.

View attachment 2912036
Interesting diagram you have provided! Definitely each tank has its own kinks.

Received the updated instruction manual from Brown Davis which is same as my tank. Number 3 is basically the fast fill breather that is connected to the main tank. So this tank has two fast fill breather one that goes by filler neck and other connect to the main tank breather.

See attached picture

I have asked them to ship me the extra parts they are suggesting and then I am going to give it one more try as per manufacturer advice.

I will have to verify that the rest of the pipes are connected to the right places.

Do you know how to correct the flooded evap canister (same thing as Charcoal Cannister right) and how to bleed the fuel system of LC 200? I think I may have to do this as part of this fix.

3E74674E-E047-4B6A-B972-FE025DBE6EEB.jpeg
 

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