Engine Coolant Thermostat - Installation

6.7L DIESEL










NOTE: Thermostats for the Cummins diesel, while physically interchangeable, should not be mixed and matched. For model year 2010 and forward, the 6.7L diesel engine uses a 200° Fahrenheit thermostat. Confirm the temperature stamp on the thermostat rim prior to removal or installation.

1. Inspect the thermostat seal for cuts or nicks. Replace if damaged.
2. Install the thermostat into the groove in the top of the cylinder head.
3. Install the thermostat housing and bolts (5). Tighten the bolts to 10 Nm (89 in. lbs.).
4. Install the heat shield. Tighten the bolts to 9 Nm (79 in. lbs.).
5. Install the exhaust pressure tube (4). Tighten to 10 Nm (89 in. lbs.).
6. Connect exhaust pressure sensor electrical connector (2).
7. Install the EGR cross over tube (1).
8. Install the P-clip and bolt. Tighten to 8 Nm (71 in. lbs.).
9. Install the radiator upper hose and clamp.
10. Fill the cooling system with coolant Service and Repair.
11. Connect the battery negative cables.
12. Start the engine and check for any coolant leaks. Run engine to check for proper thermostat operation.