Fintail fuel tanks and best laid plans...... - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 04-28-2013, 02:02 PM Thread Starter
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Vehicle: 1964 Unimog 406, 1967 230S Fintail.
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Fintail fuel tanks and best laid plans......

Hi All
I have a 230S that has not been on the road since 1982, well the road tax ran out in '82 and the last service in its service book is 1981, judging by its condition it must have been stored inside as the rust situation is not too bad and the interior is amazing, no sun damage. So far I have rebuilt its Inat carbs, overhauled its distributor and made up a new lead set etc in my on going plan to get it running properly. In my mechanic parallel universe I had planned to drain out its rancid old fuel and clean out the fuel tank and chuck the carbs back on and hey presto off it would go, so out came the tank and I jetwashed it out, and jetwashed it out and then jetwashed it out and the crap kept coming it fair to say the inside of the tank looked like it had been used to store the contents of a fair sized rock pool, a look at Niemollers website revealed the cost of a nice new one to be over a thousand pounds so that was a non starter and a second hand tank would require some sort of attention so I had a go at fixing what I had. With the tank cleaned out with degreaser and then pretty much filled with water I chopped the whole top off about an inch and a half above the join between top and bottom I then used a zip wheel, wire brush and various other abrasive things to clean out the insides which were in a dreadful state but luckily had not rotted through, now Fintail fuel tanks are not made from terribly thick material so in order to reattach the top to the bottom I tack welded a strip of twenty guage around the inside of the top edge of the bottom of the tank, leaving about an eigth of an inch protruding above the cut edge, the top was then welded to the bottom, piece of cake, well not really it was a bit of a bugger but its ended up looking pretty good, to get a fuel tight weld is a problem and the inside is rather pitted so I may use some sort of sealer to line the tank, Por 15 do one which is advertised as being ethanol proof, has anyone on here used it? To finish off I plan to paint it in zinc primer, two pack stonechip and a coat of satin black, and would have probably spent fifteen hours doing it, but its getting closer to running..

Last edited by dakotabill; 04-28-2013 at 02:05 PM. Reason: poor puctuation
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post #2 of 2 (permalink) Old 04-29-2013, 03:10 AM
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Wow, that's a lot of work. I'd be interested to hear whether it sealed...
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