help me on this one cooling issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by heavyhaulerss, Sep 24, 2016.

  1. heavyhaulerss

    heavyhaulerss Road Train Member

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    had oil cooler rebuilt. about 2 weeks later my water temp goes up about 10 degrees higher than normal. notice truck is running hotter , but not over heating, cause I'm using the manual fan about 40 % of the time. drained some coolant out, put it in a clear qt container & it looks a weird green color. look at it a few days later & on the bottom of jug there is what looks like oil. could the shop not have rebuilt the oil cooler correctly ? never had this until the rebuild, or could be coincidence?
     
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  3. 062

    062 Road Train Member

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    Was oil in the coolant the reason for rebuild?
    If so,are you sure it was flushed completely
     
  4. WrenchWrenchWrench

    WrenchWrenchWrench Light Load Member

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    Water is heavier than oil so it shouldn't be that...
     
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  5. AModelCat

    AModelCat Road Train Member

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    Its not soot is it?
     
  6. x1Heavy

    x1Heavy Road Train Member

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    Must not be a factory oil cooler. Or one big enough to do the job.

    The other posters have covered the other thoughts I had.
     
  7. heavyhaulerss

    heavyhaulerss Road Train Member

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    no actually was getting coolant in oil, so this rebuild was to hopefully solve that,as pressure test showed no leaks.
     
  8. heavyhaulerss

    heavyhaulerss Road Train Member

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    don't know. just never looked like this before, ever. until oil cooler rebuilt.
     
  9. heavyhaulerss

    heavyhaulerss Road Train Member

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    I would of thought oil would be heavier.
     
  10. Old Man

    Old Man Road Train Member

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    Ever see a oil spill on TV, the oil floats on the ocean.
     
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  11. 062

    062 Road Train Member

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    Fuel and oil both are lighter than coolant. When oil and coolant mix it makes a milky sludge. My thought was maybe the sludge built up at a restriction. But that's not the case. Anyway to post a pic?
     
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