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  1. #1
    Bronze Member
    Join Date
    Sep 2016
    Posts
    60
    Location
    Ontario
    Tractor
    Kubota BX2370

    Default Coolant Leak from block heater? Kubota BX

    Bought my tractor new with the block heater installed. Noticed some coolant on the ground and traced it back to the block heater. Also noticed that my coolant level was very low. Glad I didn't overheat it.

    Now I either attempt to fix the leak myself or I have to rent a trailer to bring my tractor in (float charge to bring it in for warranty is insane!)

    Anyone have any suggestions on what the cause of the leak could be? I plan on taking a closer look at it when I get home from work.

    Thanks in advance!

  2. #2
    Platinum Member fishpick's Avatar
    Join Date
    May 2006
    Posts
    762
    Location
    The part of NY with high taxes
    Tractor
    L4760 & BX24

    Default Re: Coolant Leak from block heater? Kubota BX

    To install a block heater you knock out a freeze plug... I suppose if the knock out was miserable and someone beat the snot out of it with a screwdriver or something and gouged the block itself - the heater might not fit the hole tight enough where the ding is and it's leaking there.

  3. #3
    Platinum Member LouNY's Avatar
    Join Date
    Jul 2015
    Posts
    940
    Location
    Greenwich, NY
    Tractor
    Branson 8050, IH 574, Oliver 1550 Diesel Utility

    Default Re: Coolant Leak from block heater? Kubota BX

    Some block heaters are threaded in, could just need some thread sealant, the ones that replace a frost plug usually have nut to snug them into place and swell the o ring that seals them

  4. #4
    Veteran Member
    Join Date
    Dec 2014
    Posts
    1,557
    Location
    Armstrong, British Columbia
    Tractor
    Kioti CK27, 580 SuperM Case Backhoe

    Default Re: Coolant Leak from block heater? Kubota BX

    It's possible you can just tighten it a little to seal it .

  5. #5
    Veteran Member sandyc's Avatar
    Join Date
    Mar 2003
    Posts
    1,398
    Location
    Steep Falls, Maine
    Tractor
    Kubota B3350 HSDC

    Default Re: Coolant Leak from block heater? Kubota BX

    Teflon tape for the threaded kind works. I installed a threaded thermostat in a 2200 a few years ago and had to redo it using tape. Threads on castings are not that tight

  6. #6
    Bronze Member
    Join Date
    Sep 2016
    Posts
    60
    Location
    Ontario
    Tractor
    Kubota BX2370

    Default Re: Coolant Leak from block heater? Kubota BX

    This is actually what it looks like

    Coolant Leak from block heater? Kubota BX-maxresdefault-jpg

  7. #7
    Super Member oosik's Avatar
    Join Date
    Aug 2012
    Posts
    6,605
    Location
    AMBER, WA
    Tractor
    Kubota M6040

    Default Re: Coolant Leak from block heater? Kubota BX

    I installed a block heater in one of my vehicles many years ago. It didn't take long and it started dripping. Then I found out that the threads in the engine block did not match the threads on the block heater. I got a plug with the correct threads - teflon pipe dope - sealed that hole up good and tight.

    Put in a lower heater hose heater - worked great.
    Ride hard or sit your butt on the porch

    "isn't it weird that in AMERICA, our flag & our culture offend so many people - but our benefits do not"

  8. #8
    Veteran Member Peter 315's Avatar
    Join Date
    Mar 2016
    Posts
    1,432
    Location
    NH
    Tractor
    Kubota L3800 hst Kubota l47 tlb ( John Deere 770 sold )

    Default Re: Coolant Leak from block heater? Kubota BX

    If that's the correct heater it just taps into the freeze plug hole. Maybe the blocks gouged like somebody else said

  9. #9
    Gold Member massey driver's Avatar
    Join Date
    Aug 2009
    Posts
    451
    Location
    north of winnipeg canada
    Tractor
    massey 175,1655 BX 2370-1

    Default Re: Coolant Leak from block heater? Kubota BX

    The block heater is a tap in.The part that looks like it has threads on does not go into the block the other side does.The instructions say to keep it from leaking you have to put Red locktite around the block heaterand hole in the block and tap it into the block.Of make sure everything is clean free from anitfreeze etc;.
    Massey Driver Larry
    MF 175 Diesel, BX 2370-1 Diesel,
    Still enjoy driving my tractors and making them work laughing:

  10. #10
    Silver Member
    Join Date
    Apr 2013
    Posts
    179
    Location
    Central, IL
    Tractor
    BX25D

    Default Re: Coolant Leak from block heater? Kubota BX

    Its a press fit block heater. Wondering if they used a sealant like Loctite 515 when installing heater. I installed mine a few years ago, pretty straight forward install. May have to unistall and install with sealant. There was a thread on here that a guy replaced his block heater. Made a slide hammer to get it off, pretty slick.

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