Leaking gas tank

V

vstol

Junior Member
my 52 custom line sedan has developed a leak at the drain plug on the gas tank I used a sealant last year but it has started dripping again any suggestions as to a sealant or gasket.
 
It is leaking through the drain plug threads, I don't recall the name of the sealant but it was suppose to work for diesel and gas didn't last but a year and a half.
 
G.M. said:
Use Teflon tape but keep it back off the first two threads. G.M.
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I cant believe you said that. Gasoline and Teflon tape do NOT mix. It will eventually soften and end up in the carb. Great for a carb clean out job. Thank you. ken ct.:)
 
I use Tite Seal T25-66 it is a medium weight paste and it has worked on any thread I ever put it on. We used it extensively on Subs.
Don
 
Is there any possibility that the threads have a crack in the fitting? I wouldn't spend to much time on sealing the leak if you have a cracked fitting.
 
The plug is a pipe thread. I would never use teflon tape on a pipe thread or around gasoline. If you used teflon tape the first time you may have split the fitting in the tank. I've seen a transmission case crack when the plug had teflon tape on it. It allowed the plug to turn too easy into the threads and crack the case.
 
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If you can remove the plug, I would chase the threads and replace the plug and coat it with a Prematex Form a gasket #3 which is designed for todays modern fuels. You may have slightly loose threads ( or worn ) on the pipe plug.
 
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