My '06 Ram 1500 started throwing a "gascap" code in the odometer display and started running rough at low rpms. After a quick investigation I found that the fuel pump assembly was just sitting in the tank and the lock ring that holds it in had completely rotted away. I got the tank out and now have to figure out if I can just replace the lock ring or if the tank itself is beyond saving. There is some metal material at the top of the tank still, I can't tell for sure but it looks like what's left on the tank was what the lock ring would have attached to?
I attached some pictures of the tank and what was left of the lock ring.

 

There is a recent thread in the Van section for just such a problem. That member got a 'lock ring repair kit' that solves this particular issue.

 

Thank you sir! I found the thread here: https://dodgeforum.com/forum/3rd-gen...acement-2.html. I'll check out the repair kit or try something similar with a replacement Mopar lock ring. I love the ingenuity!

 

That’s my thread. You’ve already done the hard part- dropping the tank and cleaning it out. Order the kit. You’ll spend $65.00 and you’ll fix the issue without a doubt.

Yours looks worse than mine did, which in this case is a good thing. You hardly have any of the locking studs left so it won’t take long to grind them down so the ring fits flush. I ran a bead of sealant outboard and inboard of the screw holes to ensure it would be sealed well, used a 1/8” drill bit to drill pilot holes, filled the holes with sealant and applied sealant to the threads of the self-tapping screws before installing. Once the pump was installed and the screws torqued, I ran a bead of sealant around the outer edge of the ring and tank surface. It does not leak!


Gas Tank ReNu

 

Too bad the pick-n-pulls puncture the fuel tanks, because they go for $30 used. An alternative might be find a good used tank from someone parting out a truck.

 

They prep the cars so A) they don't have explosions and fires in the yard.
B) so their parcel of property does not become a toxic liability from all the oil, grease, gasoline, antifreeze that would get spilled on the soil by all the 'care not' nose pickers.

 

Yeah, I meant its too bad because it'd only cost $30... not that they knock a hole in the tank because they're only $30. Another alternative is let the jyard know you want a good tank and have them remove rather than just puncture in place.

 

So, I just acquired my truck from family, 2004 1500, While cleaning it up and fixing stuff, I see a pile of pine straw accumulated between the quad cab and the short bed atop the fuel tank. After seeing these deteriorated module mount rings...

Is what I described, is that the location of the pump module?
I am concerned that Pine straw and leaves is rotting my ring!
I tried to pressure was blow them off to no avail.

 

The fuel pump is farther back. That should be the forward rollover valve.

 

Thanks for your guidance... cheers
I am trying to imagine how I am going to get under there to remove that FOD...