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.
kw w900l isx400 blowing heater or top radiator hose needhelp please.
Discussion in 'Kenworth Forum' started by woodsplitter, Jan 26, 2014.
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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?woodsplitter Thanks this. -
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.woodsplitter Thanks this. -
I have a friend that works for southwest international I will see if I can get in touch with him and find out...woodsplitter Thanks this. -
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 problemwoodsplitter Thanks this. -
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
woodsplitter and blairandgretchen Thank this. -
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...woodsplitter Thanks this. -
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. -
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. -
Is the hose conn. to EGR cooler the one that is popping?
woodsplitter Thanks this.
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