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Rebuilding fuel sending unit.


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I'm about to be getting a fuel sending unit off of another member. It reads properly and the fuel pump runs. I want to rebuild this thing as much as I can. As in putting a new fuel pump and strainer in it, and changing the oring on the electrical connecter. My question is, how hard is that oring to change? And whats the part number on it? Also its got a good bit of surface rust on the outside, can I just sand it all off and spray paint it?

 

Thanks.

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When I needed a New Sender (a good 8+ years ago) I just bought an OE XJ sender (you can still buy them new today)

and then I altered it into an MJ Sender and Had me a Brand new MJ Sender for only my time and the cost of the OE XJ one...

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When I needed a New Sender (a good 8+ years ago) I just bought an OE XJ sender (you can still buy them new today)

and then I altered it into an MJ Sender and Had me a Brand new MJ Sender for only my time and the cost of the OE XJ one...

Did you record how you modified it to work? Or know where I could find detailed instructions on doing so? I apologize for hijacking your thread Knucklehead. I need to fix my leaking gas tank as well and would like to just replace the fuel pump and sending unit as well as the o-ring. 

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When I needed a New Sender (a good 8+ years ago) I just bought an OE XJ sender (you can still buy them new today)

and then I altered it into an MJ Sender and Had me a Brand new MJ Sender for only my time and the cost of the OE XJ one...

Did you record how you modified it to work? Or know where I could find detailed instructions on doing so? I apologize for hijacking your thread Knucklehead. I need to fix my leaking gas tank as well and would like to just replace the fuel pump and sending unit as well as the o-ring.

 

No sorry I don't think I kept the pics and info from back then but it was really easy for me...

 

Looks Like it was 7 years ago I Did it but this is the only pics I have left but they are just the senders not the mods..

Image Not Found

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If the mounting 'ears' (that engage the locking ring) are still sound you can easily refurbish that unit. I would remove all the parts except the sender, tape the sender very well and then sandblast the metal. Once cleaned I'd look for small pin holes and deep voids, filling them with a steel epoxy filler. Then paint the entire unit with a fuel proof paint such as glass kote (two part epoxy paint used in scale modeling). You can still order the harness assembly if you look hard enough - but would have to put a splice (I used bullet connecters) in the two wires for ease of removal.

New pump (I used Bosch) and hoses.

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I may actually have to wait on the full rebuild. I just researched how to paint in winter, and ends up theres no successful way really. I have no indoor, warm, place that I could go. I'm still going to get a new locknut and oring for it and I'm going to search thoroughly for pin holes. The "ears" are still perfectly strong. Its all surface rust. My only worry is on the inside of the unit, that white surface residue. How could I get rid of that white stuff, if it would impair the opperation of the unit in any way? A full rebuild will happen this summer hopefully. Gotta have this thing in sooner though.

 

Thanks.

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