Their is often a chance of repair BUT to ascertain the complete state of the tank removal is almost always required 1st.
most marine aluminum tank leaks i have seen/heard are corrosion from the outside in , often just small areas or holes in the bottom or back of the tank
0r in welds. but mostly just in the thin plate .
others may experience different.
often they occur at some point where salt water remains in contact
via damp foam/wood support /fiberlass contact or just random corrosion.
the rest of the tank is sound but there are often multiple weakened spots.
at that point if you have the tank out the savings with experimenting with it vs new dont seem to ahve good cost benefit long term, its a job never want to repeat.
Many guys are coating the new tanks wtih truckbed liner (imperfect but substantial barrier0 or some other treatment to hopefully extend life
and the results seem to be good.
we used to think the "cross linked plastic"
tanks were the future but people are seeing some problems with them , especially at sending unit ports, hardware connections etc, but at least thery dont corrode out the bottom.
and small leaks in fittings can maybe be permatexed or otherwise repaired.
In a proline it looks like radical surgery is often required but im open to suggestions in case its me "moaning" at some future time and looking for this thread.
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