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38 Gal tank experiences....

Discussion in '3rd Gen Tundras (2014+)' started by KeithM, Mar 19, 2018.

  1. Feb 11, 2019 at 8:49 PM
    #121
    Fastestcolor

    Fastestcolor New Member

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    I think the consensus is that doing that regularly will burn up the fuel pump which is why Toyota gives the low fuel warning so early on the tundra. It’s a poorly designed tank plain and simple
     
  2. Feb 11, 2019 at 9:06 PM
    #122
    jc153

    jc153 Speed-ish Glamper

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    I honestly don’t think running your tank down to a gallon or so is bad for the fuel pump. I’ve done this in all my vehicles and have only replaced 1 fuel pump. It was in a 1991 Chevy Silverado at about 150k.
    I’m on my second Tundra without issue. The sending unit is what determines when your fuel light comes on. The tank design allows for use of all the gas in the tank so I think the design is fine.
    I just don’t think the fuel pump needs to be submerged in gas to keep cool enough not to fail. I swapped out my 26 gallon tank for a 38 gallon tank and the fuel pump holds quite a bit of gas. Enough to keep it cool without being submerged in my opinion.
    Anyway, just my opinion based on my experience.
     
  3. Feb 12, 2019 at 3:11 AM
    #123
    Haggis777

    Haggis777 New Member

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  4. Feb 12, 2019 at 3:15 AM
    #124
    Haggis777

    Haggis777 New Member

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    LEDs interior & exterior, stubby antenna, Bak-Flip cover, 285's, AGM battery, block heater
    What was the task like and how much did it run you in changing from a 26 to 38 gallon tank?
    I run my 26 gallon down past E and can only put in ~17 gallons...VERY frustrating...
    thought about the after-market 46 gallon tank but it is close to $1,000! Thanks, jc153.
     
  5. Feb 12, 2019 at 4:30 AM
    #125
    nodak67

    nodak67 New Member

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    that sounds like a sensor error. you should be putting in around 10-12gal at the 1/2 mark on the guage. on the 38gal tank in the platinum, the wife usually fills at the 1/2 mark (cause ND winters and the potential to get stuck for hours) and it consistently fills ~16-18 gals each time.
     
  6. Feb 12, 2019 at 6:24 AM
    #126
    jc153

    jc153 Speed-ish Glamper

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    2009 Tundra Ltd CM 4x4
    BAMuffler 8" Catback, ADS 2.5 Coilovers, TC Heim Joint UCA's, TC Spindle Gussets, Wheelers Superbumps, CB Steering Kit, Carrier Bearing Drop & ABS Drop Kit, Rear ADS Triple Bypasses w/Deaver U748 Springs & TC Shackles, 17" Method Standards, 35/12.5/17 Toyo RT's, Nitro 488 Gears w/Auburn LSD, Evil Manufacturing Bumpers, RCI Skid Plates, White Knuckle Sliders, LED's Everywhere
    The tank swap was pretty straight forward. The crossmember was a pain. Trying to fit it in an assembled truck took some finesse but other than that just disconnecting and reconnecting parts. I sourced all my parts from a local dealer and all in it was about $1500 or $1600. Here’s a thread with a bunch of good info.
    https://www.tundras.com/threads/07-14-38-gallon-tank-swap-install-thread.27144/
    It’s so much nicer having the larger tank. My range is about 500 miles now on road trips depending on mpg.
     

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