[Mickldo]

Originally Posted by joshoisasleep

For my purposes I need to make a tank that is auxiliary to my main tank (FJ62). It will be aluminum so it can be used for veggie oil, and should hold near to the same amount of fuel as the primary tank.

My mounting idea was to try and put it underneath the primary tank, where the spare tire usually goes. If anybody has any other ideas, or reasons why it shouldn't go there, please say. As is normal, there is already loads of weight in the back... however in my case I have slightly upgraded rear leafs, but not front ones...

Mounting... my ideas are: bolt to frame, make mounts that bolt AROUND frame, or possible attach in the same manner as the spare tire was attached.

My mate has one on his HJ61 mounted there and he has another mounted next to the tailshaft for a total of about 250L. Both made from steel. Sorry don't have any more details on it.

We make boats at work and we build our own fuel tanks. If making it from alloy make sure you get the correct grade alloy. A lot of alloys will get micro cracks in it when folded. I can't remember off the top of my head what grade the boys use ( I don't actually make the tanks). Make sure you leave an expansion void in the top of the tank above the maximum fill capacity to allow for hot days. The breathers need to be located properly too so it won't be a bitch to fill. Try to keep the filler and breather tubes from having low points in it too for ease of filling. Don't forget a drain bung in the bottom too.