Category Archives: 6.7L Cummins

6.7L Cummins Cooling System – Cooling System – Fill

Make sure air is vented during the fill process: • Some thermostats have check balls that allow air to vent through the thermostat when the thermostat is closed. • An air vent port connection, which connects to the top tank/coolant recovery tank of the cooling system, is located     next to the water outlet. The… Read More »

6.7L Cummins Cooling System – Cooling System – Flush

To vent air during the fill process: • Some thermostats have check balls that allow air to vent through the thermostat when closed. • An air vent port connection, which connects to the top tank/coolant recovery tank of the cooling system, is located next to the water outlet. This provides adequate venting for a fill… Read More »

6.7L Cummins Cooling System – Cooling System – Drain

Position the vehicle or equipment on a level surface. Isolate the engine from the vehicle cooling system by closing coolant flow valves to the equipment heating systems before initiating repair. This will prevent the heater circuit from draining, minimizing the chance for air pockets to be present during the fill process. Refer to the OEM… Read More »