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Diesel Tank Leak
Posted: Tue Aug 12, 2008 5:32 pm
by stevebeanie
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
Posted: Tue Aug 12, 2008 7:46 pm
by David in Wales
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
Posted: Tue Aug 12, 2008 9:41 pm
by Christian
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
Posted: Tue Aug 12, 2008 9:46 pm
by mark white
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
Posted: Wed Aug 13, 2008 2:37 pm
by Kiwi Kev
Mark
Sounds like you know from experience
Kiwi Kev
Posted: Wed Aug 13, 2008 3:31 pm
by mark white
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
Posted: Thu Aug 14, 2008 5:17 pm
by stevebeanie
thanks for the advice, will have a go at using the Por stuff. Steve
Posted: Tue Mar 24, 2009 10:06 pm
by Pascal
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?
Posted: Tue Mar 24, 2009 10:17 pm
by Emiel
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
Posted: Thu Mar 26, 2009 7:45 pm
by Pascal
Thank you for your advice, Emiel.