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SKU:
ZZ3F03292
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4336659 82℃ 180℉ Thermostat Fit for Cummins N14/ISX/M11/ISM PAI 181887
$48.39
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$48.39
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
Thermostat for Cummins N14/ISX/M11/ISM
This 82℃ (180℉) thermostat is a direct replacement thermostat engineered for Cummins heavy-duty engines, referencing OEM cross-reference numbers 4336659 and 181887, and it regulates engine coolant temperature to maintain optimal operating conditions. Designed for the demands of commercial trucking, this thermostat ensures consistent thermal management for reliable engine performance.
Overview
This thermostat is a cooling system component that opens and closes to maintain the engine at its ideal 82℃/180℉ operating temperature. It is built to match the specifications required for Cummins N14, ISX, M11, and ISM engines, serving as a dependable replacement for worn or stuck-open thermostats. The unit ensures the engine warms up quickly and stays within the correct temperature range for efficient combustion and reduced emissions.
Built For Performance
- Precisely calibrated to open at 82℃ (180℉) for consistent engine temperature control.
- Constructed with corrosion-resistant materials for long service life in harsh coolant environments.
- Meets or exceeds OEM specifications for reliable sealing and flow regulation.
- Includes the wax-pellet actuation mechanism for accurate and repeatable thermal response.
- Compatible with standard cooling system pressures found in heavy-duty diesel applications.
Fits These Machines
- for Cummins N14
- for Cummins ISX
- for Cummins M11
- for Cummins ISM
On-The-Job Use
- Replacing a failed thermostat during routine cooling system maintenance on Class 8 trucks.
- Installing in over-the-road tractors to prevent engine overheating on long hauls.
- Used in fleet maintenance shops to restore proper warm-up and operating temperature in heavy-duty diesel engines.
Specs At A Glance
| Opening Temperature | 82℃ / 180℉ |
| Part Number(s) | 4336659, 181887 |
| Engine Compatibility | N14, ISX, M11, ISM |
Good To Know
Q: Will this thermostat fit my Cummins ISX if the engine has a different serial number? A: The 4336659/181887 cross-reference covers the standard thermostat housing for these engine families, but always verify the gasket surface and housing diameter against your specific unit before installation.
Q: What happens if I use a thermostat with the wrong temperature rating? A: Using a thermostat with a different rating can cause the engine to run too cold or too hot, leading to poor fuel economy, increased wear, or overheating. This unit is calibrated specifically for 82℃/180℉ operation.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.