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pissing anti freeze

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by FatBoyBlazer, Sep 10, 2001.

  1. FatBoyBlazer

    FatBoyBlazer 1/2 ton status

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    does any one know where i should check where my radiator is leaking........i went through a whole bottle today, and it looks like it is leaking out of the lower passenger side black rubber hose, all the top hoses look fine an aren't leaking....where else should i check

    high
     
  2. wakedog

    wakedog 1/2 ton status

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    hmmm.... sounds like exactly what mine is doin, same hose too from what i can tell. Im wondering the same question.

    <a target="_blank" href=http://www.bigredjimmy.iwarp.com>http://www.bigredjimmy.iwarp.com</a>
     
  3. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    The best way to rule out a bad hose is to watch for a pinhole leak when the motor is hot. I bet if you crawl under the truck while she's running, you'll find the leak. To lose that much in a day I'd think that you either have a cracked tank or a split in the core.....

    I've seen lots of rad leaks that drip down through the supports and then down the hose. That could be what is happening to you.


    <font color=blue> MEAN DAD WITH TWO BAD KIDS<font color=blue>
     
  4. Blazer79

    Blazer79 1/2 ton status

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    The nice way:
    Take it to a shop to have it pressure tested and the pinholes welded.

    The nasty way:
    Empty the coolant and blow with your mouth through the filling neck while somebody else listens where the hissing comes from. Use some good epoxy to seal the pinhole.

    Good luck.

    <font color=purple>//////
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    Soon a 454 K5!!</font color=black>
    [​IMG]
     
  5. HarryH3

    HarryH3 1 ton status Author

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    Look to see if the underside of the lower hose has been rubbing on the frame or crossmember. That's a pretty common place for a leak to start. [​IMG] I like to cut a section out of the old hose and tie-wrap it around the new hose in that area to prevent the new hose from suffering the same fate. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  6. AussieK5

    AussieK5 1/2 ton status

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    This is a bit left field and you may already have done it, but check its not leaking from your waterpump, there should be a small hole on its underside (I assume its there as a tell tale for when the shaft seal wears) and fluid will make its way from here collecting on the underside of the lower hose (elsewhere too). I've seen this happen twice. Good luck.
     
  7. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Good point, Aussie......I guess you guys down there are used to looking "down under" for the obvious stuff first[​IMG]!!!!!

    I can't beleive this wasn't mentioned earlier[​IMG]!!!!



    <font color=blue> MEAN DAD WITH TWO BAD KIDS<font color=blue>
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    I agree. Mine failed, thought it was the hose, it was the weep hole on the water pump. Fluid puddles up at the end of the hose, then trickles down the underside of the hose, amking it look like the hose isn't tight enough. It will leak with the truck warm, off, most likely as well, since the system should be pressurized when its hot.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     
  9. TorkDSR

    TorkDSR 1/2 ton status

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    i work at an auto parts store, and we lend out a pressure tester, you just pump it up to 25lbs, and look for the geyser of green, or it could be the headgsket, what color is the exhaust smoke?

    Tork DSR
    I just got a winch, it takes the fun out of things.
     
  10. taterblazer

    taterblazer 1/2 ton status

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    I know this is an older post but nobody made the point that water pumps have a leak hole on top that when the seals go bad inside it will leak anti-freeze. If that's happening you need to replace the pump. NAPA is your friend!
     
  11. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    UHHHH........Tater, look a little bit closer at what Aussie said above........[​IMG][​IMG]



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  12. wakedog

    wakedog 1/2 ton status

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    Well, my was doing the same thing as i posted before. Went to napa and bought a water pump for $15.00. Went home and switched them, no more leak, its quite nice now.

    <a target="_blank" href=http://www.bigredjimmy.iwarp.com>http://www.bigredjimmy.iwarp.com</a>
     

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