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Category: Heavy Equipment
Satisfied Customers: 3653
Experience:  16 Years working on Cummins Diesel engines,
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how do you replace the water pump on a cummings isx. I have

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how do you replace the water pump on a cummings isx. I have done this on some case tractor motors be fore but not on a ISX it is very hard.

Hello it is not hard at all, just time consuming. You might have to remove the alt and big bracket on the water pump side for better access.Also in some cases the vibration dampener needs to be removed.


Here are the steps


  • Drain the cooling system.
  • Remove the water pump drive belt and tensioner.
  • Remove the refrigerant compressor drive belt
  • Remove the five capscrews, the water pump, and the o-ring seal.

    Discard the o-ring seal

  • Inspect the water pump housing for cracks.

    Inspect the water pump weep hole for indication of leaks.

    A streak or chemical buildup at the weep hole is not justification for water pump replacement. If a steady flow of coolant or oil is observed, recondition the existing water pump or replace the water pump with a new or rebuilt unit.

  • Lubricate and install the new o-ring seal.Do not use petroleum based lubricants. Petroleum based lubricants cause the o-ring seals to crack, leading to a coolant leak.

    Install the two guide studs.if needed

    Install the water pump and three capscrews. or five if the guide studs are used.

  • Tighten the capscrews.

    Torque Value: 72 n.m [53 ft-lb

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