Category Archives: 6.7L Power Stroke

The EGR cooler is located on top of the right valve cover and cools the exhaust gas before it enters the engine. This device, like the CAC, is also an air-to-coolant heat exchanger.

The 6.7L CAC is an air-to-coolant heat exchanger. This allows for more cooling capacity in a smaller under hood space.  

Powertrain Secondary Cooling System Flow • The powertrain secondary cooling system cools the following components: –– Charge Air Cooler (CAC) –– fuel cooler –– EGR cooler –– transmission oil cooler • The coolant is drawn into the inlet of the coolant pump from the degas bottle. The coolant exits the pump and is routed to… Read More »

The primary coolant pump is located on the left front of the engine. The heater core transfers heat from the primary cooling system to the passenger compartment. Coolant is routed into the heater core from the coolant crossover pipe at the front of the engine. Coolant passes through the heater core and routed to the… Read More »

The coolant also passes from the cylinder head into the first half of the EGR cooler and then back into the cylinder head to cool the exhaust gases before they enter the cylinder.

The engine oil cooler is located on the left side of the engine oil pan. Coolant flows from the lower rear of the block through the heat exchanger and back to the coolant pump inlet at the lower hose connection.

Primary Thermostat The primary thermostat has two thermostatic devices in one assembly. It is located in the coolant crossover at the front of the engine. The thermostat regulates the engine coolant temperature by controlling the flow of coolant through the primary radiator. The two thermostatic devices do not open at the same coolant temperature. The… Read More »

• Coolant is sealed via rubber O-ring seals. • Coolant is directed through two passages in the front cover. One for the right bank of cylinders and one for the left bank of cylinders. • During warm up the thermostat blocks the coolant flow to the radiator and the coolant is routed back to the… Read More »

Primary••••Cooling System Flow The primary cooling system cools the following components: –– engine block –– cylinder heads –– engine oil cooler –– turbocharger –– EGR cooler Coolant is drawn into the pump inlet located in the front cover from the bottom radiator port and flows from the coolant pump through the front cover to the… Read More »

The 6.7L Power Stroke® diesel engine has two separate cooling systems: • The engine cooling system, called the primary or high temperature cooling system, • The powertrain secondary cooling system, a low temperature system which cools the Charge Air Cooler (CAC), fuel cooler, EGR cooler and transmission oil cooler. Both cooling systems have their own… Read More »