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New Steel Tank - Paint And Coat Or Don't?

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by RustNeverJeeps?, Mar 13, 2018.

  1. Mar 13, 2018
    RustNeverJeeps?

    RustNeverJeeps? having a come apart

    Lake of the Ozarks
    Joined:
    Jun 25, 2016
    Messages:
    46
    My new JP1A steel tank arrived in the mail yesterday. My old tank had enough rust in it that it would choke a filter when it got to around 2-3 gallons remaining. I'm soliciting opinions...

    -Should I paint the exterior and coat the interior?
    -Coat interior only?
    -Paint exterior only?
    -Leave it alone and install as-is... they're relatively inexpensive (~$60) anyway

    I'm not trying to build a show rig here - just repairing/replacing what makes sense. Jeep is down to a rolling chassis at present, and probably will be for the next 5-6 months.

    I live in a part of Missouri that sees little snow, so little salt... though it's unlikely to see much/any winter duty.

    What has worked or not for you folks?

    Thanks
     
  2. Mar 13, 2018
    sterlclan

    sterlclan Member Sponsor

    exploring the...
    Joined:
    Feb 21, 2009
    Messages:
    2,465
    Paint the outside and keep it full of treated gas.
     
  3. Mar 13, 2018
    PeteL

    PeteL Member Sponsor

    Hills of NH
    Joined:
    Aug 3, 2003
    Messages:
    5,634
    Paint outside.

    Use Seafoam additive in your fuel, to remove moisture and ethanol by-products.
     
  4. Mar 13, 2018
    TIm E

    TIm E Sponsor Sponsor

    NW Arkansas
    Joined:
    Mar 2, 2017
    Messages:
    265
    Having heard that the quality and longevity isn't all that great on replacement tanks, I used a sealer kit on mine. It isn't cheap and a bit of a process, but easier to do now than having to replace a tank or well...leaking gasoline is just bad. Hopefully it will extend the service life, but who knows?

    I have had good experience with KBS Coatings products. I used their large cycle tank kit and followed the instructions VERY carefully. I was worried it might not be enough sealer, but after fully coating it, there was nearly 2/3 can of sealer left over when I drained the excess. It was very nicely and fully coated too...confirmed with an inspection camera once cured.

    Gas Tank Sealer - Large Motorcycle Tank Sealer Kit - Fiberglass Tank Sealer
     
  5. Mar 13, 2018
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    1,380
    I dont really know the answer - but I painted my new replacement on the outside and left the inside as is. Honestly I think I was a bit hesitant that coating the inside would be a bit difficult, and decided that since I refill my jeep tank quite often (every 1-2 weeks), it would be just fine. Its worked great for 3 years so far and shows almost no deterioration (although that is hard to see on the inside). I figure if it lasts for 10+ years - I'll get my money out of it and can replace it. I think replacing it is easier than coating the inside (and that is for my rear tank - its even easier for the underseat tank). I also figure the fuel pick-up, short rubber hose connections and sending unit will all start going bad before the tank, and I'll have to drop it to address those concerns and can check out the inside then as well.
     
  6. Mar 13, 2018
    OldKooT

    OldKooT New Member

    I80
    Joined:
    Mar 7, 2018
    Messages:
    19
    I have replaced many over the years in assorted projects. Never had an issue with just painting the outsides, and leaving the inside well enough alone. Some coatings don't hold up well to long term ethanol use, (despite claims) and as you know in your area and mine, that is tough to avoid.
     
  7. Mar 13, 2018
    Focker

    Focker Ran when parked... Runs while moving. Staff Member Sponsor

    Tri-Cities WA
    Joined:
    Aug 18, 2014
    Messages:
    5,261
    I never thought to do either... I just bolted it up, filled it with gas and drove. :shrug:
     
    RustNeverJeeps? likes this.
  8. Mar 13, 2018
    Andy Salagaj

    Andy Salagaj Joshua70x7

    Colorado
    Joined:
    Aug 3, 2016
    Messages:
    14
    I have had two tanks rust out on the bottom on my 73 CJ5 - I decided the problem might be the foam (rubber?) mat underneath the tank because it seemed to stay wet a lot. I installed a new tank and did not replace the rubber mat and have had no rust problem (at least on the outside) since. I also agree it helps to fill up your tank pretty often to discourage rust on the inside. JMO.
     
  9. Mar 13, 2018
    timgr

    timgr Jeepin' Nerd Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    18,817
    This happened to my brand new 1973 CJ-5 in 1973. Don't put that pad between the skid and the tank - the pad makes the tank rust out. The skid plate is optional on these Jeeps, and the tank will stay up there without the support of the pad. Indeed, the pad is likely there to keep the relatively flimsy skid plate from collapsing into the tank. Reinforce the skid plate if you worry about leaving the pad out.

    Note that '76 and later is different - those Jeeps require the skid plate to support the tank.

    Is the new tank painted or galvanized? I think the Spectra part is likely ok. External rusting would not worry me - I'd just install it if it's bright galvy plated.
     
  10. Mar 14, 2018
    RustNeverJeeps?

    RustNeverJeeps? having a come apart

    Lake of the Ozarks
    Joined:
    Jun 25, 2016
    Messages:
    46
    Thanks, all. I think I'll be hitting it with the rattle can and installing. I was happy to read some dissenting posts about the mat between the skidplate and the tank... I was just eyeballing some horse mat and considering using it. I'll be sure to NOT do that.
     
    FinoCJ likes this.
  11. Mar 14, 2018
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member Sponsor

    Denver, CO
    Joined:
    Jul 18, 2013
    Messages:
    1,380
    I pulled the parts for my rear tank (not standard on 1970) from a junkyard. The tank wasn't usable as it rusted through on the bottom where the mat was between the skid and tank (but the skid and all the brakcets were usable). When I installed the replacement tank I left out the mat and mounted the skid - there is a small gap between them that I make sure to keep cleaned out of mud and dirt after a wheeling adventure, and I think it works well.
     
    RustNeverJeeps? likes this.

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