Join Date: Sep 2006
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Rep Power: 8
Pump the tank out untill the diesel is gone.
Fill the tank with water.
Cut inspection apertures into the top ot the tank if you don't have them already.
Pump out the water.
Dry the bottom of the tank until it is bone dry.
Fill the bilge up to the floorboards with water.
Get a flashlight and shine it into the tank.
If it is leaking, you will see the beads of water appearing.
If so, drill a few holes through the lowest point of the tank.
Get your hose and detergent and scrub and abrade the tank floor and walls until absolutely clean.
Get some two part polysulphide adhesive and seal the floor of the tank.
let it dry.... it takes about a week.
Flood the bilge again, get flashlight, check for leaks. mark leaks with a coin or coins.
Pump out the bilge.
Re-do the leak areas.
Repeat until no leaks.
Flood tank with water up to brim.
Leave for a week to check for in-to-out leaks.
If tank sound, fill tank to brim with water.
Weld on the tank top surface, equipped with inspection hatches for next time.
Pump out tank.
Fill with diesel.
Been there, done that, 11 years ago.