kw w900l isx400 blowing heater or top radiator hose needhelp please.

Discussion in 'Kenworth Forum' started by woodsplitter, Jan 26, 2014.

  1. woodsplitter

    woodsplitter Bobtail Member

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    My w9 with isx400 keeps indicating that it's running hot.
    It's full of anti-freeze but the gauge will rise to 200° with the buzzer going off. I'll stop for a few minutes it will go down slowly to 150° then I'll roll again. But eventually it will blow a whole in the top passenger side hose. It's about 21/2 -3" in diameter hose. It has been replaced once on the side off the road, now it has done it again.I checked anti-freeze level 30 miles before full. Is it a frozen thermostat or this erg valve or what. Need some help please.
     
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  3. WorldofTransportation

    WorldofTransportation Heavy Load Member

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    No idea what is causing it never heard of one doing that... Heard of hoses going but not like that... You need to get to a shop.... It could be very major..or it might not be much of anything.. could be as simple as water pump not working.... thermostat... a clogged hose... a clogged radiator... a fan not working right.. that little switch that tells the fan when to come on and off (can't remember what it is called)... or it could be something interal.. you need a shop.. not tomorrow... or the next day.. you need that checked you might be doing major damage to it.. Get it checked out..

    My rule of thumb is when the shutdown buzzers start going and I can't find out why... I get it to a professional..

    Good luck.. I think you are going to need it..

    question... when the thing overheats is your fan coming on?
     
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  4. snowwy

    snowwy Road Train Member

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    200 degress is normal operating temp.

    sounds like your gauge is out of whack. might also be the sensor to the gauge.

    i bet if you plugged into the ecm. the sensor to the ecm is reading higher then the gauge. the truer temp. which means your truck is overheating. probably at 225 when the fan is designed to kick in.

    in order to be blowing hoses. you have to be building up pressure. beyond the normal hot water condition. you need to find out WHY. before the motor blows.
     
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  5. WorldofTransportation

    WorldofTransportation Heavy Load Member

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    My fan kicks in at 190... most will kick in way before 225... 212 is boiling point..Granted I have 2 cummins both older n14's... but 4 detroits and 1 cat... and I haven't had one run over 200 since I got rid of my 3406b years ago... 225 is way to hot for , at least my motors. my 4 14 liters never run above 195.. never.. normally run at 175...

    I have a friend that works for southwest international I will see if I can get in touch with him and find out...
     
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  6. WorldofTransportation

    WorldofTransportation Heavy Load Member

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    Guy at works son works for Great Plains cummins he is at work tonight(driver not mechanic) and he only owns Isx as his son is the guru at cummins... He said they do run hot...185 to 200 isn't anything... So I stand corrected....

    I would get it to a shop anyway.. like snowy said.... you need to find out why it is building up so much pressure....

    Guy said he will call his son in the AM and ask him what would or could cause your problem
     
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  7. RAGIN CAJUN

    RAGIN CAJUN Light Load Member

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    Start with thermostat 1st,if theres pressure in your line and the fans kicking on .its either coolant not circulating to due Stuck thermostat not opening putting pressure on line or Waterpump isnt circulating to push water thru and its acting like a pot and just burning coolant up,With these frigid temps we been having lately is possible your thermistat is stuck,a old trick take out thermostat and put a lighter on it for a few if it opens adter getn hot its good,if not its bad,id suggest wait for it to cool all the way down 1st,take thermostat out and run it for a while if it stills run hot,could be a clogged radiator,make sure theres nothing in the way of your fan obstructing airflow,next wait for truck to cool completely down,open radiator cap and start truck get up there n look at radiator while truck is running if you see swirls in your coolant your water pump is fine and its pumping,if your coolant is not swirling,your water pump isnt pumping,my truck normally runs between 175-190
    Which is normal if your busting lines you definitely have a pressure problem,or perhaps your coolant may be low due to busted line and your not sure how much is in..fill coolant to Full capicity while truck running,so much coolant goes thru motor block,transmission,radiator,water pump,once its full then it wont take anymore..DO NOT OVERFILL,Then you will have to drain...if all else fails...IF ALL THESE TROUBLESHOOTS DONT WORK-CALL ROADSIDE OR TRY N GET TO NEAREST SHOP...
     
    Last edited: Jan 26, 2014
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  8. RAGIN CAJUN

    RAGIN CAJUN Light Load Member

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    Jun 20, 2013
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    Start with thermostat 1st,if theres pressure in your line and the fans kicking on .its either coolant not circulating to due Stuck thermostat not opening putting pressure on line or Waterpump isnt circulating to push water thru and its acting like a pot and just burning coolant up,id suggest wait for it to cool all the way down 1st,take thermostat out and run it for a while if it stills run hot,could be a clogged radiator,make sure theres nothing in the way of your fan obstructing airflow,next wait for truck to cool completely down,open radiator cap and start truck get up there n look at radiator while truck is running if you see swirls in your coolant your water pump is fine and its pumping,if your coolant is not swirling,your water pump isnt pumping,my teuck nor,ally runs between 175-190
    Which is normal if your busting lines you definitely have a pressure problem,or perhaps your coolant may be low due to busted line and your not sure how much is in..if all else fails...IF ALL THESE TROUBLESHOOTS DONT WORK-CALL ROADSIDE OR TRY N GET TO NEAREST SHOP...
     
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  9. blairandgretchen

    blairandgretchen Road Train Member

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    South west Missouri
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    First thought I had was pressure build up - stuck thermostat, can also test in just boiled water if available.

    Would diluted coolant allow freezing in the radiator?

    Would a plugged heater core build up enough pressure?

    Pinched or collapsed line to the heater core?

    My 2c tractor repair offerings.
     
  10. snowwy

    snowwy Road Train Member

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    you could have a bad thermostat. could be a plugged radiator. could be a weak waterpump. could be something in the motor itself.

    water boils at 212. 50/50 mix boils at 260. weaker the solution. less cold it has to get to freeze.

    the isx's i've been in. ran at 190 on flat land. fan kicks on at 215 i think it was. at 225 ecm shuts down. all the isx's i've driven were 05 and newer though.

    i'm in a new dd15 now. it runs at 180. fan kicks on at 220.

    i'd still have that water gauge checked and compared to what the ecm is actually reading. also.

    i used to be a auto mechanic. years ago. i've seen plenty of dash gauges read incorrectly to the ecm.
     
  11. baha

    baha Road Train Member

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    Is the hose conn. to EGR cooler the one that is popping?
     
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