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Isx435 high idle temp

Discussion in 'Trucks [ Eighteen Wheelers ]' started by rell27910, Dec 10, 2015.

  1. Dec 10, 2015 #1
    rell27910

    rell27910 Bobtail Member

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    Nov 18, 2015
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    I have a 06 International 9200i with an isx435st. My problem when I let the truck idle the temperature rises to 205. Going down the road its between 175-185. What could be causing the temperature to rise so high at idle
     
    rell27910, Dec 10, 2015
    rell27910, Dec 10, 2015
    #1
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  3. Dec 10, 2015 #2
    DaveLV

    DaveLV Light Load Member

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    261
    Sep 18, 2015
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    No air flowing constantly thru the radiator. Thermostats. Water pump not moving enough coolant. I can throw rocks all day.
     
    DaveLV, Dec 10, 2015
    DaveLV, Dec 10, 2015
    #2
    NWAF, KB3MMX and mountaingote Thank this.
  4. Dec 10, 2015 #3
    mountaingote

    mountaingote Road Train Member

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    Sep 22, 2012
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    Probably no air thru radiator. As long as the fan comes on at 205 you're ok
     
    mountaingote, Dec 10, 2015
    mountaingote, Dec 10, 2015
    #3
  5. Dec 11, 2015 #4
    GrapeApe

    GrapeApe Road Train Member

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    Jan 7, 2013
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    We have an 07 9200i that was doing that too, it's a pretty small radiator and not much room under the hood. The fan clutch crapped out on us and we replaced it with a 2 speed fan that helped a lot. Seems to run about 190 at idle now.

    I'd make sure that the radiator is clean, it's doesn't take much dirt/bugs in them to cause problems with such a small radiator.
     
    GrapeApe, Dec 11, 2015
    GrapeApe, Dec 11, 2015
    #4
  7. Dec 13, 2015 #5
    rell27910

    rell27910 Bobtail Member

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    3
    Nov 18, 2015
    0
    I appreciate it Fellas I'll check to see how dirty it is
     
    rell27910, Dec 13, 2015
    rell27910, Dec 13, 2015
    #5
  8. Dec 13, 2015 #6
    damil

    damil Light Load Member

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    247
    Sep 23, 2012
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    pressure wash the radiator. replace coolant filter
     
    damil, Dec 13, 2015
    damil, Dec 13, 2015
    #6
  9. Dec 14, 2015 #7
    slavcha

    slavcha Light Load Member

    151
    133
    Oct 17, 2011
    Utica NY
    0
    I had same problem on 2008 prostar isx, after i replaced thermostat truck runs normal at 180
     
    slavcha, Dec 14, 2015
    slavcha, Dec 14, 2015
    #7
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