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Specifications

The PAI 181841 Thermostat is engineered for Cummins 855 88NT (LFC) engines equipped with idler setups. Rated to open at 187 °F (86 °C), it offers precise coolant flow regulation—promoting optimal engine warm-up, preventing overheating, and ensuring smooth operation under varied load conditions. This thermostat is a direct replacement for Cummins OE part 3064455 and cross-references Cummins 3039395 and 3061500. Built with durable materials and manufactured under ISO-certified standards, it delivers dependable, long-lasting performance. Backed by a 2-year unlimited-mileage warranty and sold by Wofford Truck Parts, the 181841 Thermostat provides OEM-level reliability for highway trucks, rebuilds, and classic diesel applications.
Weight
0.32

Compatibility

Freightliner FL Series / Classic – late 1970s to mid-1990s

Kenworth W900 / T800 – late 1970s to mid-1990s

Peterbilt 359 / 379 – late 1970s to mid-1990s

International 9000 / 9200 / 9400 Series – early 1980s to mid-1990s

Mack CH Series – 1980s to early 1990s (when specced with Cummins 855)

Western Star 4800 / 4900 – 1980s to early 1990s


Alternative Part Numbers

  • Cummins 3039395
  • Cummins 3061500
  • Cummins 3064455
  • Interstate-McBee M-3064455 (implied from OE equivalent)
  • PAI 181841

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