Finally got around to rebuilding the fuel pump stems. They were rusted out and finally started to leak recently. I drilled out the old and made both leads 5/16", then used steel to nylon compression fittings. I ran the nylon forward just past the proportioning valve then rejoined the steel. I wasn’t sure if the compression fitting would seal on the old rusty lines, I sanded them as much as I could but they still had small pits. No leaks. The brass ferrules are soft enough to still seal up even if the surface isn’t perfectly smooth.
I also broke one tank stud off during removal so we will see how it does with one missing. I bought a new tank seal and added sealant around the broken stud area.
When rebuilding the hanger I welded the 5/16" to the old 1/4" return line for stability, then put one very small bead at the very top (on the face facing inside the tank) for the high pressure line. I did not weld around the stems where they pass through the cover on the outside because I didn't want to risk melting the connectors or sensors. I used JB Weld on the outside after sandblasting the plate thoroughly. The welding holds them in place so the JB Weld should work just fine to keep a seal for emissions. Also switched the nuts to stainless locknuts.
Update: so far the broken tank stud isn’t causing any trouble. No emissions codes. I think I’m good to go for a while.
I also broke one tank stud off during removal so we will see how it does with one missing. I bought a new tank seal and added sealant around the broken stud area.
When rebuilding the hanger I welded the 5/16" to the old 1/4" return line for stability, then put one very small bead at the very top (on the face facing inside the tank) for the high pressure line. I did not weld around the stems where they pass through the cover on the outside because I didn't want to risk melting the connectors or sensors. I used JB Weld on the outside after sandblasting the plate thoroughly. The welding holds them in place so the JB Weld should work just fine to keep a seal for emissions. Also switched the nuts to stainless locknuts.
Update: so far the broken tank stud isn’t causing any trouble. No emissions codes. I think I’m good to go for a while.
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