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Cummins · Cooling System
5273379
In stock · ships from Knoxville
This is a coolant thermostat for 8.9 liter Cummins ISC and ISL diesel engines.
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Verified fitment for 2 applications
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Primarily for Stage 2 Automotive 8.9L ISC/ISL engines. May also suit certain Cummins industrial equipment using the same thermostat housing.
Part data verified against 5 catalog sources
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It opens at a specific temperature to regulate coolant flow between the engine and radiator, keeping the engine at its optimal operating temperature. A faulty thermostat can cause overheating, poor heater performance, or reduced fuel efficiency, so it is commonly replaced as part of cooling system maintenance.
Part Number: 5273379
T-STAT
Dealer: Knox Trailers
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