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leaking coolant***now it leaks only when plugged in***

Discussion in '1982-Present GM Diesel' started by joez, Oct 29, 2003.

  1. joez

    joez 1/2 ton status

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    i have a coolant leak coming from the block heater. is the only way for me to fix this to drain the coolant, and remove the plug? its not leaking bad, but it is leaking enough to mark its spot when sitting overnight.

    ***UPDATE***
    well, it stopped leaking there for a while, all on its own. then i plug it in and o man, looked like someone wizzed under the truck. it was really leaking bad. 2 days later, it slowed back down. i have had almost no time to fix this properly, if it is leaking more when plugged in, could this be the actual block heater? or just from the temp difference when the block heater is warming up and the block isnt?
     
  2. Tybee

    Tybee 1/2 ton status

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    Re: leaking coolant

    I would say yes! /forums/images/graemlins/thumb.gif
     
  3. joez

    joez 1/2 ton status

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    Re: leaking coolant

    thats what i figured, ill take care of it this weekend.
     
  4. OFFRDK5

    OFFRDK5 1/2 ton status Premium Member

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    Re: leaking coolant

    Do it the right way the first time and you won't have to deal with it a second time somewhere in BFE!! /forums/images/graemlins/rotfl.gif
     
  5. imiceman44

    imiceman44 1 ton status

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    Re: leaking coolant

    [ QUOTE ]
    i have a coolant leak coming from the block heater. is the only way for me to fix this to drain the coolant, and remove the plug? its not leaking bad, but it is leaking enough to mark its spot when sitting overnight.

    [/ QUOTE ]

    Well while I agree things should be repaired correctly, I had the same problem but worse, water was gushing out, and I tried the radiator seal for a quick fix to get home, and 4 years later, it still is holding.
    It's just that in a van it's not as accessible as in a truck so i tried it that way and now I can't bring my self to tear into it since it's doing fine.
    /forums/images/graemlins/grin.gif
     
  6. joez

    joez 1/2 ton status

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    Re: leaking coolant

    just out of curiosity, what exactly did you use?
     
  7. imiceman44

    imiceman44 1 ton status

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    Re: leaking coolant

    [ QUOTE ]
    just out of curiosity, what exactly did you use?

    [/ QUOTE ]

    I don't remember which brand but it was one of the silvery flakes like Bars radiator stop leak.

    Like I said if it was accessible I would rather fix it right, it doesn't take that nuch, but if you are stranded somwhere far from home it's worth it, and once it's fixed I rarely go back and fix it.
    /forums/images/graemlins/rotfl.gif
     
  8. joez

    joez 1/2 ton status

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    Re: leaking coolant

    dont worry, i plan on fixing it up right the first time, i was just curious what it was that plugged yours up that well. i have had bad luck with all that stop leak in the past.
     
  9. imiceman44

    imiceman44 1 ton status

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    Re: leaking coolant

    Well with me it was hit and miss.
    Some times it worked fine, and sometimes not.
    I one time had a mercedes with a blown motor that lost most of the oil, overheated, blew the head gasket, got water in the oil and spun a bearing and seized the engine.
    After a couple of days of thinking, I turned the engine backwards, that put the bearing back in it's place, put some of the radiator seal, put RESTORE in the oil, and then ran it for 6 months till I could afford a replacement engine.
    Other imes I tried all kinds of sealers and none worked and finally tore the engine down and replaced the gasket.
    Like I said I try at first then...
    /forums/images/graemlins/thumb.gif
     
  10. joez

    joez 1/2 ton status

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    Re: leaking coolant

    this thing just isnt cooperating, see my edited post.
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: leaking coolant

    You're gonna have to break down and replace the block heater. They are not expensive, I spent $20 or less on a replacement for mine. I was in the middle of the diesel swap when I found mine leaked...so we drained some coolant and replaced it.

    There is a bolt in the center of the block heater that you undo and then it needs to be pried out. My buddy volunteered to fight it out and I did hear some cussin from under there but eventually it did come out. He then used a dremel tool to clean up the edges of the freeze plug hole, then installed the new block heater. It's basically an O-ring that seals against the freeze plug hole...

    The tough part is that the motor mount is partially in the way, but we managed.

    Rene
     
  12. joez

    joez 1/2 ton status

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    Re: leaking coolant

    thats what i figured, damn that sucks. the only reason i havent gotten to it is due to lack of time. is there a drain on the block anywhere? i know that gassers had them, but i havent really looked for one on the 6.2.

    so the block heater is not threaded in? i always thought it was. tommarow is supposed to be 50 here, ill do it then, hopefully.
     
  13. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: leaking coolant

    There is probably a drain...but as far as I know we didn't use it.

    Once you pick up the new block heater you'll see how it's retained and how it seals.

    Rene
     
  14. joez

    joez 1/2 ton status

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    Re: leaking coolant

    ok, thank you for your help. i dont know what i would do without this site.
     

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