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  1. #1
    New Member
    Join Date
    Jan 2009
    Posts
    14
    Location
    Vestal,NY
    Tractor
    L3400,JD 325,AC model B 1935

    Default l3400 antifreeze leak

    anyone have antifreeze leaks on an L3400 I have a leak between the frame and the motor I cant figure out were the antifreeze is coming form I am think I have a crack in block.

  2. #2
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,420
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: l3400 antifreeze leak

    There could be a casting core plug rusted and leaking. How old is this tractor and how often have you changed the antifreeze?
    Also is it possible there was not adequate antifreeze in the cooling system and a freeze push out a core plug? KennyV

  3. #3
    New Member
    Join Date
    Jan 2009
    Posts
    14
    Location
    Vestal,NY
    Tractor
    L3400,JD 325,AC model B 1935

    Default Re: l3400 antifreeze leak

    thanks some good info the tractor is less than a year old.

  4. #4
    Gold Member Ace3's Avatar
    Join Date
    Jan 2008
    Posts
    257
    Location
    Albany, New York
    Tractor
    Kubota L3540 Cab

    Default Re: l3400 antifreeze leak

    Check if its leaking from around the engine block heater if you have one.

  5. #5
    Elite Member johnk's Avatar
    Join Date
    Jun 2003
    Posts
    2,633
    Location
    western NY
    Tractor
    Kubota GST Grand L3130 w/ 723 loader, Ags

    Default Re: l3400 antifreeze leak

    Quote Originally Posted by ht1 View Post
    thanks some good info the tractor is less than a year old.
    If it's less than 1 yr old it should still be under warranty if purchased new..

  6. #6
    New Member
    Join Date
    Jan 2015
    Posts
    6
    Location
    Brainerd mn
    Tractor
    Kubota L3400

    Default Re: l3400 antifreeze leak

    Hi guys new to the site- I was wondering if you ever found out what was leaking

  7. #7
    New Member
    Join Date
    Jan 2015
    Posts
    6
    Location
    Brainerd mn
    Tractor
    Kubota L3400

    Default Re: l3400 antifreeze leak

    I seem to have a similiar leak- it never had it until I put a heater element in. It is not leaking from that but seems to leak between frame and block down on to oil pan on left side of tractor. Not much about a drip every couple days. Could this be from when I did install heater element and some got between block and frame and is slowly leaking?? Seems to much of a coincidence that it just started now.

  8. #8
    Super Member 94BULLITT's Avatar
    Join Date
    Feb 2011
    Posts
    7,907
    Location
    Frederick County, VA
    Tractor
    Kubota BX2360 & L4240 HSTC

    Default

    Quote Originally Posted by Germanshorthairs View Post
    Could this be from when I did install heater element and some got between block and frame and is slowly leaking?? Seems to much of a coincidence that it just started now.
    It could be. Can you get a mirror in there to see where it is leaking? Put a peice of tape on your coolant reservoir to mark the coolant level so you can tell if you are loosing any. I would also spray some water between the block and frame to try and flush it out.

    I had a dealer installed block heater on the Bobcat I had. When the guy put it I guess coolant ran all over the block. He said he pressure washed it off and I did too a couple of times. It took 50-60 hours to get rid of the smell.

  9. #9
    New Member
    Join Date
    Jan 2015
    Posts
    6
    Location
    Brainerd mn
    Tractor
    Kubota L3400

    Default

    Thanks- I will try to flush and wait and see if it quits- I sure hope that's all it is- otherwise it's s cracked block or something I guess- that would suck royally - are cracked blocks common?

  10. #10
    Veteran Member
    Join Date
    Sep 2004
    Posts
    2,420
    Location
    Kansas, Butler county, Just east of DooDah
    Tractor
    Kubota L4200 GSTCA

    Default Re: l3400 antifreeze leak

    Quote Originally Posted by Germanshorthairs View Post
    Could this be from when I did install heater element and some got between block and frame and is slowly leaking?? Seems to much of a coincidence that it just started now.
    Remove the rad cap and make a plug to fit... then pressurize the system to around 10 to 15 pounds.... You should be able to closely check every possible leak joint... Use a white paper towel, it will show a stain the color of your antifreeze, if there is even a tiny seep. KennyV

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