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Specifications

The PAI 181902 Rear Cover Water Pump Repair Kit is engineered specifically for Cummins ISX engines as a direct replacement for OE part number 4090022. Crafted with precision machining and a durable material composition, this rear cover and included o-ring deliver a tight seal—preventing coolant leaks and ensuring efficient coolant circulation. PAI’s rigorous testing standards and ISO-certified manufacturing guarantee OEM-level reliability. This genuine PAI kit comes with a 2-year unlimited-mileage warranty and is supplied by Wofford Truck Parts to help reduce downtime in heavy-duty applications.
Weight
0.56

Compatibility

Freightliner Cascadia, FLD, and Century Series — 2001 onward (ISX engine adoption)

Kenworth (T660, W900) with ISX specs — early 2000s onward

Peterbilt (379, 579) with ISX engines — early 2000s onward

International ProStar / LoneStar (ISX15) — ProStar 2006–2016, LoneStar 2009–2024

Volvo VNL series, Mack Pinnacle, and others spec’d with ISX — early 2000s onward


Alternative Part Numbers

  • Cummins 4090022
  • CUP181902
  • Interstate-McBee M-4090022
  • PAI 181902

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