Shopping for: Confirm the part against your engine serial number and application before ordering.
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Cummins ISB / QSB / 6B 5.9 / 6.7 Cooling System
Cooling System for Cummins ISB / QSB / 6B 5.9 / 6.7 engines. Every part in this collection is listed for the 6B, 6BT, ISB, QSB by its catalog application record, not by its title. Check your engine serial number or CPL against the part page before ordering.
12 part numbers. Match the part number and your engine serial number — not sure? Call or text (720) 445-6249.
| Part # | Replaces | Description | Fits | Price | Availability |
|---|---|---|---|---|---|
| 181940 | Cummins 3864178 Cummins 3925473 |
Cummins QSB SERIES ENGINE THERMOSTAT KIT | CUMMINS QSB SERIES ENGINE | Call for price | Request lead time |
| 181954 | Cummins 4990286 Cummins 5292723 |
Cummins ISB ENGINES THERMOSTAT | CUMMINS ISB ENGINES | Call for price | Request lead time |
| 181907 | Cummins 3935824 Cummins 3937171 Cummins 3946849 |
Cummins ISB ENGINES THERMOSTAT KIT | CUMMINS ISB ENGINES | Call for price | Request lead time |
| 181863 | Cummins 4090093 Cummins 4929643 Cummins 5292743 |
Cummins ISB ENGINES THERMOSTAT | CUMMINS ISB ENGINES | Call for price | Request lead time |
| 181940OEM | — | Cummins QSB SERIES ENGINE THERMOSTAT KIT | CUMMINS QSB SERIES ENGINE | $110.06 | Ships from supplier · Lead time confirmed when you order |
| 181907OEM | — | Cummins THERMOSTAT KIT | CUMMINS ISB ENGINES CUMMINS QSB SERIES ENGINE |
$114.40 | Ships from supplier · Lead time confirmed when you order |
| 181843E | Cummins 3283589 Cummins 3902465 Cummins 3906700 +3 more |
Cummins THERMOSTAT | CUMMINS 4B ENGINES 3.9 CUMMINS 6B ENGINES 5.9 |
$13.70 | Ships from supplier · Lead time confirmed when you order |
| 181955 | Cummins 4990285 Cummins 5292724 |
Cummins ISB ENGINES THERMOSTAT KIT | CUMMINS ISB ENGINES | $34.98 | Ships from supplier · Lead time confirmed when you order |
| 181938 | Cummins 2881688 Cummins 2881688NX Cummins 5473237 |
Cummins QSB SERIES ENGINE WATER PUMP KIT | CUMMINS QSB SERIES ENGINE | $134.96 | Sold out - call for options |
| 181887 | Cummins 2882757 Cummins 3335549 Cummins 3335550 +4 more |
Cummins THERMOSTAT | CUMMINS N14 ENGINES CUMMINS L10 ENGINE +2 more |
$28.24 | Ships from supplier · Lead time confirmed when you order |
| 181866 | Cummins 3954830 Cummins 3974371 Cummins 4929644 +4 more |
Cummins THERMOSTAT KIT | CUMMINS 4B ENGINES 3.9 CUMMINS ISB ENGINES +2 more |
$20.97 | Ships from supplier · Lead time confirmed when you order |
| 181823 | Cummins 3286278 Cummins 3286279 Cummins 4089142 +5 more |
Cummins WATER PUMP KIT | CUMMINS ISB ENGINES CUMMINS QSB SERIES ENGINE |
$57.72 | Ships from supplier · Lead time confirmed when you order |
Got a Number We Don't List?
Text a photo of the part tag — a specialist crosses it and quotes you fast.