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post #2 of (permalink) Old 10th July 2010
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Re: Fuel pump won't seal in the tank

Under no circumstances use silicon or any sealant for that matter - it'll end up in your fuel system with dire consequences.
What tools did you use to remove the old one and for how much time elapsed between removal and fitting.
The ring should easily screw home by hand and only require a slight tighten. It may be the tank has deformed out of shape - not an unknown problem with modern plastic tanks I'm afraid.
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