Originally Posted by hlev00
I have a plastic diesel fuel tank
that has developed a leak at the sender. The problem seems to be caused by one of the screws that has stripped the hole in the tank and won't bite. Other screws are secure. I saw some suggestions of creating a backing plate but I'm not in a position to do that at this point so am looking for an interim solution.
I am thinking of
1. Using a small amount of 4200 to seal the screw hole.
2. Apply 4200 around the sender to seal the leak between the tank and the sender plate.
Is 4200 the right stuff to use? Will it seal from the outside? I'm concerned about the 4200 coming off the screw and ending up in my fuel
line, though hopefully the primary filter would pick it up.
Do you have any other alternative approaches?
The best repair for a poly tank is welding.
The second best is a compression
seal with backing plate.
of poly tanks
with diesel present almost never work or last. If the leak is on a flat area then option 2 works well.
Unfortunately Murphy's law ensures the leak is located such that option 1 is required.
Poly welding is easy. Heat is needed but not an open flame. Cleaning
the tank is not.
A self tapping screw and diesel compatible gasket
cement might work as a field repair.
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