Diesel Tank Leak

stevebeanie · Post by **stevebeanie** » Tue Aug 12, 2008 5:32 pm

I have a small leak on the corner on my diesel tank where the bolt fixes onto the mounting. Does anyone know a quick way of fixing it. Thanks Streve

David in Wales · Post by **David in Wales** » Tue Aug 12, 2008 7:46 pm

When I restored my KFD Major, I cleaned out the inside of the tank with old bolts shaken around with some petrol to clean out any rust & debris.
Then blew it out with compressed air and left it to dry for a few days.
Used POR51 chemical sealer. Expensive but seals the tank 100% guaranteed.
See adverts in T&M or try suppliers like AgriLine or Dunlop Spares or your local motor factors.
I also did my oil bath aircleaner bowl as well.
David

Christian · Post by **Christian** » Tue Aug 12, 2008 9:41 pm

Hi
I'm restoring a Power Major.
On my fuel tank the soldered seams which seal the thread brackets to the tank were cracked.
So I heated it with a blowtorch and removed the old soldering tin.
Then I cleaned it with a wire brush and soldered it new with a flux filled soft solder.
It worked really good.
But you have to demount the tank and you must clean it from any fuel.
Sorry, I don't speak English very well.
Regards Christian

mark white · Post by **mark white** » Tue Aug 12, 2008 9:46 pm

Hi

I agree that por 15 is great stuff, but make sure you seal off the leak-back pipe in the tank

It will block up the pipe very easy

Kiwi Kev · Post by **Kiwi Kev** » Wed Aug 13, 2008 2:37 pm

Mark
Sounds like you know from experience

Kiwi Kev

mark white · Post by **mark white** » Wed Aug 13, 2008 3:31 pm

Ye I sure do

Once that por-15 goes off and sets, it's like concrete

But it does a great job of sealing old rusty tanks as long as you follow the instructions correctly

stevebeanie · Post by **stevebeanie** » Thu Aug 14, 2008 5:17 pm

thanks for the advice, will have a go at using the Por stuff. Steve

Pascal · Post by **Pascal** » Tue Mar 24, 2009 10:06 pm

Hi guys,

I had a leak in the tank of my Super Major too. It's been soldered.

I think the leak had 2 reasons: bad rubbers under the tank and the bolts were tightened to much.
I have bought new rubbers at the NH-dealer.

How much will I have to tighten the 4 bolts? I guess it's a good idea to add some spring washers?

Emiel · Post by **Emiel** » Tue Mar 24, 2009 10:17 pm

Hello Pascal,

You should tighten the bolts good, otherwise they will rattle loose, and when they are loose the vibratrions an the rattling will cause the solder to crack and the steel sheet wears.

Just tighten them up, to a "usual" strengt for the bolt. They are 7/16 I thougth, so you are allowed to tighten them. Otherwise they would have chosen smaller diameter.

Spring washer or lock washer will not do any harm.

Best regards

Emiel

Pascal · Post by **Pascal** » Thu Mar 26, 2009 7:45 pm

Thank you for your advice, Emiel.