180℉ 3974823 5292708 Thermostat for Cummins 5.9L ISB 4.5L QSB B-Series Engines
$35.19
Sale price
$35.19
Regular price
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SKU:
ZZ3F01221
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180℉ 3974823 5292708 Thermostat for Cummins 5.9L ISB 4.5L QSB B-Series Engines
$35.19
In Stock
$35.19
Sale price
$35.19
Regular price
Opening Temperature
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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 5.9L ISB 4.5L QSB B-Series Engines
This 180°F thermostat, referencing OEM cross numbers 3974823 and 5292708, regulates engine coolant temperature for Cummins 5.9L ISB, 4.5L QSB, and B-Series engines. It is a direct replacement part designed to maintain optimal operating temperature and efficient engine performance. This thermostat is for Cummins engines that require a 180°F opening temperature.
Overview
This 180℉ thermostat for Cummins 5.9L ISB 4.5L QSB B-Series engines ensures your engine reaches and maintains its ideal operating temperature. It controls coolant flow to prevent overheating and reduce wear. This thermostat is a critical component for any Cummins 5.9L or 4.5L engine in demanding applications.
Built For Performance
- Designed to open at 180°F (82°C) for consistent engine temperature
- Reference numbers 3974823 and 5292708 for cross-compatibility
- Direct fit for Cummins 5.9L ISB, 4.5L QSB, and B-Series engines
- Premium construction to withstand high engine vibration and pressure
- Ensures rapid warm-up for reduced emissions and fuel consumption
Fits These Machines
- for Cummins 5.9L ISB engine
- for Cummins 4.5L QSB engine
- for Cummins B-Series engines
On-The-Job Use
- Used in agricultural tractors and combines
- Installed in industrial generator sets and pumps
- Applied in construction equipment and skid steer loaders
- Suitable for marine auxiliary power units
Specs At A Glance
| Opening Temperature | 180°F (82°C) |
| Part Number(s) | 3974823, 5292708 |
Good To Know
Q: Is this thermostat a direct replacement for my Cummins 5.9L engine? A: Yes, it is designed to match the fit and function of the original thermostat, with cross references to OEM part numbers 3974823 and 5292708.
Q: What happens if the thermostat fails? A: A faulty thermostat can cause the engine to run too cold or overheat, leading to poor fuel economy and potential engine damage. Regular replacement is recommended to maintain proper cooling system operation.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.