Leak in degass bottle

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by earnies2, Jun 11, 2021.

  1. earnies2

    earnies2 Medium Load Member

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    I have a small leak in my degass bottle cummins ISX, International prostar. I tried to epoxy it its still leaking. Can I drill a small hole in the cap so it doesn't build pressure just to get kome I have a new one ordered at the house. Any suggestions appreciated
     
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  3. lester

    lester Road Train Member

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    What the heck is a degass bottle?
     
  4. Goodysnap

    Goodysnap Road Train Member

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    Coolant surge tank

    Instead of drilling the cap, just crack it loose if you dont want it to build pressure.
     
  5. earnies2

    earnies2 Medium Load Member

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    Its the plastic bottle that you put antifreeze in...
     
  6. earnies2

    earnies2 Medium Load Member

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    I put some weather stripping adhesive over the crack and several layers of duct tape because the epoxy didn't stick... this seems to be holding i also put a tiny hole with my test light next to the cap to release any pressure
     
  7. God prefers Diesels

    God prefers Diesels Road Train Member

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    Is that just a "get you home" fix, or permanent? I'm asking, because the coolant system needs to be pressurized. Every pound of pressure raises your boiling point by three degrees. So a 10 lb cap will put you at 242* before the water starts to boil. It's pretty easy to hit 212* on a hard pull, and when it starts to boil it gasses in your coolant jacket and things will start to overheat wildly without it even looking like you're running hot, because coolant isn't actually touching that part anymore because as soon as the coolant tries to, it phase changes to vapor. Makes it really easy to crack a head without even realizing you're in danger.

    You might already know all this, but if you don't, just FYI.
     
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  8. earnies2

    earnies2 Medium Load Member

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    Just temporary to get me to Boston whare I have a new bottle waiting for me. So water boils at 212 what temp does antifreeze boil at?
     
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  9. God prefers Diesels

    God prefers Diesels Road Train Member

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    Antifreeze boils around 250ish. But 50/50 boils at 223*. As long as you stay fairly cool, the "process" will never start, and you'll be safe.
     
  10. earnies2

    earnies2 Medium Load Member

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    So I will just put my fan on when pulling a hill to be safe and watch the gauge. Thanks
     
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  11. earnies2

    earnies2 Medium Load Member

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    Update made it home and changed bottle and my 12 volt heater control valve...
    All is well...thanks
     
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