Rust in '74 Gas Tank

[Charley]

Just when I was getting ready to reinstall my rebuilt engine, I noticed rust in the gas tank! I’m rebuilding a stock ’74 911, so I assume I’ve got plastic baffles. I’ve learned from previous postings that sealer products won’t work, or will damage the plastic. Does anyone know of a do-it-yourself solution, or do I need to spend the money for a new gas tank?

[ed martin]

I just went through a situation with a rusty tank. I flushed it, treated it with rust inhibitor etc. but overall nothing can really adress all that rust. I may have had an exteme situation. In addition I installed some clear filers just to monitor the sitiuation and it was amazing how must rust accumulated in such a short time, and give you problems, despite everything I did. If its a car you want to keep I would simply spend the extra money and buy a brand new gas tank. Then you'll have eliminated completely somthing thats will only give you a myriad of trouble in the future, checking and replacing lines, filters and also the very real possibility of leaving you stranded somewhere you don't want to be at the wrong time.