Overflowing radiator

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Kamal deo, Sep 24, 2018.

  1. Kamal deo

    Kamal deo Bobtail Member

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    Sep 24, 2018
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    I just wanted to know why my isuzu npr trucks radiator water overflows 4hg1 when driven
     
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  3. Justrucking2

    Justrucking2 Road Train Member

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    Sep 12, 2017
    Plymouth MI
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    Blown head gasket? Go to NAPA and pick up a block test kit, it will tell you if you have exhaust gas getting into the coolant system. Others will chime in...
     
    fargonaz and boneebone Thank this.
  4. WRT Boss Lady

    WRT Boss Lady Bobtail Member

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    Oct 25, 2016
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    My cat was a cracked head :(

    All the extra liquid was fuel - pull a sample and see if it's flammable.

    Poor man's way to check for exhaust gases.... insert a hose into the radiator and put the other end in a bottle of water.. With the engine running, do you have bubbles in your bottle?
     
    Rideandrepair Thanks this.
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