Theromstat Kit

The PAI Industries 181844 Thermostat Kit is a 180 °F vented coolant thermostat designed for Cummins 4B (3.9L) and 6B (5.9L) engines. This OE-equivalent kit includes a thermostat, seal, and gasket for hassle-free installation. Made to meet or exceed OEM standards and backed by a 2-year unlimited-mileage warranty, it ensures reliable temperature control and system sealing. Sold by Wofford Truck Parts, it’s ready to keep engines running smoothly.

Pai Industries Part No: 181844

$25.83

Specifications

The PAI 181844 Thermostat Kit is an all-inclusive cooling system component crafted for Cummins 4B and 6B engine families. Featuring a vented thermostat that opens at 180 °F (82 °C), this kit includes the thermostat, seal, and gasket—everything needed for a proper installation. Built in the USA under ISO-certified manufacturing, it aligns with OE fit and performance standards, offering durability and precision. Cross-referenced to Cummins part numbers 3802273, 3802968, 3912587, 3972071, and others, the kit assures compatibility across legacy engine configurations. Sold by Wofford Truck Parts and backed by a solid 2-year unlimited-mileage warranty, the 181844 delivers dependable thermal regulation and leak-free performance—ideal for maintenance and rebuilds of heavy-duty diesel engines.

Weight

0.24

Compatibility

Freightliner Medium-Duty Trucks (Business Class M2, FL series) – mid-1990s to early 2000s

International Medium-Duty (e.g., 4000 / 9000 series) – mid-1990s to early 2000s

Kenworth / Peterbilt Trucks using Cummins 4B/6B in medium-duty models – mid-1990s to early 2000s

Navistar / International school buses and chassis with 4B/6B engines – mid-1990s to early 2000s

Vocational trucks and cab-chassis builds using 4B/6B engines – mid-1990s to early 2000s

Alternative Part Numbers

Cummins 3283589
Cummins 3802273
Cummins 3802968
Cummins 3902465
Cummins 3906700
Cummins 3910706
Cummins 3912587
Cummins 3917324
Cummins 3972071
Cummins 5292738
Interstate-McBee M-3283589
Interstate-McBee M-3802273
Interstate-McBee M-3802968
Interstate-McBee M-3917324
Interstate-McBee M-3972071
PAI 181843
PAI 181843E
PAI 181844

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