Yacht Diesel Tank Leak Testing: Soapy Water Technique and More

[@albertfunk1176]

To correct a leaking weld you need to grind back down to the root and weld all around from both sides.
The correct gasket material for diesel is Perbunan, cut from one large piece, not strips.

[@sailingkulali]

Thanks Albert. What do you mean by weld around from both sides? As in do a weld clockwise then counter clockwise?

[@albertfunk1176]

@@sailingkulali In which direction the welding is guided is insignificant. If you have welded both sides are BOTH leaking. Grind the weld at this point and meticulously make sure that there is no contamination there. Grind this away as well.
Even the soap residue can prevent a good weld, it would have been better to work with pure water.
Go in search of a professional welder and hire him for an hour. He will immediately see the causes and can give valuable tips.

[@sailingkulali]

@@albertfunk1176 Hi Albert, thank you. today I actually ground back the voids and TIG welded up to seal. I was guided by two professional welders in terms of verbal advice. They look much better now. Keep an eye out for the next vid which show them. Way more control with TIG welding, but definitely a skill to practise and learn....

[@albertfunk1176]

@@sailingkulali This is the right way to go.