Rusted Diesel Tank - Lots of Pics - Page 4 - JeepForum.com

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post #46 of 65 Old 08-14-2014, 09:52 AM
SSF556
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My 2008 CRD has a steel fuel tank...verified with a magnet


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post #47 of 65 Old 08-14-2014, 11:29 AM
Radcrd
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I believe they are ALL steel. The guys claiming theirs are plastic may be thinking they are due to the rubberized coating applied to the tank making it feel like plastic. I have been hearing more and more stories of the rusted out fuel tanks. Seems like they may be all doomed eventually....

2007 WK CRD QDII, GDE HOT tune. 275/55/18'' on Sahara's, SRT8 suspension.
2000 Jetta TDI (hers)
2006 Liberty CRD (sold)
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post #48 of 65 Old 08-14-2014, 01:09 PM Thread Starter
ryann04
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I've helped two people locally with the same issue so far. So it seems to be common

2008 - Jeep Grand Cherokee - 3.0L CRD - Quadra Drive II - GDE Hot-Tune - OME HD Lift Kit - OEM Full Steel Skids
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post #49 of 65 Old 08-14-2014, 01:35 PM
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They are all steel. I pulled mine a month ago or so and it didn't look to bad. The skid had small amount of dirt in it, but overall pretty good shape. Its easy to see how they can go bad pretty quick once enough salt and junk gets in between the tank and the skid.

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post #50 of 65 Old 08-14-2014, 02:47 PM
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Quote:
Originally Posted by tnadanzig
They are all steel. I pulled mine a month ago or so and it didn't look to bad. The skid had small amount of dirt in it, but overall pretty good shape. Its easy to see how they can go bad pretty quick once enough salt and junk gets in between the tank and the skid.
So, when are you going to be building replacement tanks?

2008 CRD QDII, OME HD, Pintlers wheels with 265/70/17 Goodyear Silent Armour's, Jeepinbyal UCA's. 4XGuard Front guard, Side Guard, belly guard, Matrix HC. GDE ECO Tune w/ delete.
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post #51 of 65 Old 08-14-2014, 03:56 PM Thread Starter
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Originally Posted by BAH101 View Post
So, when are you going to be building replacement tanks?
My thoughts exactly.

I wish someone would make a urethane version of them.

2008 - Jeep Grand Cherokee - 3.0L CRD - Quadra Drive II - GDE Hot-Tune - OME HD Lift Kit - OEM Full Steel Skids
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post #52 of 65 Old 08-14-2014, 07:20 PM
Tango.
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I think either some por-15 or that bedliner stuff on the bottom before it rusts would help alot. tanks are not cheep.
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post #53 of 65 Old 08-14-2014, 08:13 PM
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Quote:
Originally Posted by TangoTango View Post
I think either some por-15 or that bedliner stuff on the bottom before it rusts would help alot. tanks are not cheep.
That's what I plan to do to my tank before Winter gets here!

2007 CRD Limited w/QDII
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post #54 of 65 Old 08-15-2014, 09:38 AM
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Well, I have a design for a new tank, but it goes in place of the spare tire for my 4 link kit.
If a mold wasn't so expensive, I would entertain a rotational molded tank. I worked as an intern for two years in college at a rotational molding company and still have some connections there. I should see how much it would cost for a mold. My guess it would be close to 10K as they are made from cast aluminum.

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post #55 of 65 Old 08-15-2014, 10:41 AM Thread Starter
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Quote:
Originally Posted by tnadanzig View Post
Well, I have a design for a new tank, but it goes in place of the spare tire for my 4 link kit.
If a mold wasn't so expensive, I would entertain a rotational molded tank. I worked as an intern for two years in college at a rotational molding company and still have some connections there. I should see how much it would cost for a mold. My guess it would be close to 10K as they are made from cast aluminum.
What's the damage on the tank that goes in the wheel well? Sounds interesting.

2008 - Jeep Grand Cherokee - 3.0L CRD - Quadra Drive II - GDE Hot-Tune - OME HD Lift Kit - OEM Full Steel Skids
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post #56 of 65 Old 08-15-2014, 01:02 PM
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At the moment, I have no idea. I have it drawn up in CAD and a rough BOM for it. That's about it.

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post #57 of 65 Old 08-15-2014, 03:39 PM
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I'm very interesed in a 2nd tank as secondary aux. tank that can re-fuel the primary for more range.
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post #58 of 65 Old 08-20-2014, 03:47 PM
oldsmoke
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Shame on Jeep for not giving us a plastic fuel tank. A plastic tank protected by the steel skid would have been the proper way to do it. This is really shoddy engineering.

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post #59 of 65 Old 08-20-2014, 08:07 PM
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It could be used as a secondary tank, it was going to be designed as a primary tank for those who want to get rid of the stock tank. I am slowly going to build my Jeep to make more rear travel than the stock control arms can handle and want a wider axle so I will need to put in a four link. I will build the tank to fit in between the stock rear cradle. I can easily make it possible to put in a transfer pump to allow you to fill the stock tank. I will probably make me a one off as I have built a new rear cradle that is quite a bit different than stock and allow me to run a larger tank. I really want about a 35-36 gallon tank so I can go 800 miles or so on one tank.

Jeep should of built a plastic tank, but with I am sure like everything it came down to cost and it just wasn't going to happen. The cost of plastic tank to have a low level of permeability to fuel evaporation is high compared to a steel tank. This issue was starting to get more talk when I used to work in the industry.

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post #60 of 65 Old 08-23-2014, 08:47 PM
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Since my Jeep is around the same age and has obviously seen a lot of salt by all the rust underneath the vehicle, I decided to drop my tank and POR-15 it...and the rest of my under body.

I've barely started, but just a heads up for anyone else attempting this, you'll likely need one hell of an impact gun. My cordless wouldn't budge the 18mm (closest socket that fit) bolts that hold the straps in place. I had to bust out the Ingersoll Rand Titanium 1/2 inch impact gun to get them to move...but they did move unlike the skid plate bolts that snapped off last year.

Also, unless someone has some tricks that I couldn't think of, it would appear you have to disconnect at least one side of the rear prop shaft to access the front most bolt.

The fuel lines are easy to disconnect. Only one had an additional locking red tab that needed to be pulled out, all others just have a press in button to release the connections.

'07 GC CRD QDII, EHM, GDE ECO, DPF & intake rez delete, Paramount Perf Valve Body, Roof drain mod
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