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Low oil pressure 08 isx 450.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dandkexpress, Apr 25, 2017.

  1. Apr 25, 2017 #1
    Dandkexpress

    Dandkexpress Bobtail Member

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    Apr 25, 2017
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    Had my front end seals replace due to excessive oil leaks. After everything was done my oil pressure sits real low around 15 at idle. Before was around 20. Plus i also lost some horsepower. At highway speed it sits around 32 with fresh oil and filter. Before was around 37. I had cummins rechecked the timing and redo the overhead adjustment but i have a feeling they didn't do anything because i stillhave the same issue. Any ideas would be appreciated. Thx
     
    Dandkexpress, Apr 25, 2017
    Dandkexpress, Apr 25, 2017
    #1
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  3. Apr 25, 2017 #2
    Tug Toy

    Tug Toy Road Train Member

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    CHECKING the timing and running the overhead won't change your oil pressure. Relief valve, oil viscosity and bearing clearances is what changes oil pressure. If it's just 2 or 3 lbs I wouldn't worry to much. I assume you have an ISX cummins? These engines run prey low oil pressures. Max for them is 40 lbs at cruse speed. 15 at idle I think is close to the low end but I think is still in spec.

    Horsepower loss, have no way to validate your claim. I don't dought you but could be 1000 diffrent things based on the info you supplied. I would be checking the sensor connections anywhere they worked for starters.
     
    Tug Toy, Apr 25, 2017
    Tug Toy, Apr 25, 2017
    #2
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