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Q: I have a fuel leak by what looks to be a fuel pump on frame rail under driver side on 1990 Ford E-350

Is there a o-ring in the fuel line connector at this device. How does this connection come loose so that it can be repaired?
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yes, there are o rings in the line. i do not believe that they are replaceable. i checked with ford and the line is still available but depends on whether you have dual tanks or single tanks. you can check at a parts department at your local ford dealer for the parts availability. they will also have the tool to release the line.

there is also a fuel filter on the bottom of that pump that has a seal that is prone to failure have to order the filter and seal from dealer
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