Engine Cooling

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Always fill the cooling system with the same coolant that is present in the system. Do not mix coolant types. Failure to follow these instructions may result in cooling system or engine damage.

The cooling system components include the following:

Block heater
Coolant pump
Cooling fan blade
Cooling fan clutch
Cooling fan shroud
Cooling fan stator - 6.0L diesel
Cylinder head temperature (CHT) sensor - 4.6L, 5.4L and 6.8L
Degas bottle
Engine coolant temperature (ECT) sensor - 6.0L diesel
Pressure relief cap
Radiator
Radiator draincock
Thermostat
Vistronic fan clutch - 6.0L diesel

Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle.

When adding engine coolant, use a 50/50 mixture of engine coolant and distilled water.

To maintain the integrity of the coolant and the cooling system:

Add Motorcraft Premium Gold Engine Coolant with Bittering Agent or equivalent (yellow color). Do not mix coolant types.
Do not add/mix orange-colored Motorcraft Specialty Orange Engine Coolant with Bittering Agent (US) Motorcraft Extended Life Engine Coolant (Canada); or equivalent. Mixing coolants may degrade the coolant's corrosion protection.
Do not add alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing.
Do not mix with recycled coolant. Use of such coolants may harm the engine and cooling system components. Do not mix coolant types.

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 1: Coolant Flow Diagram, 4.6L (2V) with Auxiliary Heat

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	18476	Heater core assembly
2	8594	Thermostat housing
3	8575	Thermostat
4	18K470	A/C and heater tube assembly
5	18465	Heated PCV coolant hose
6	9A474	Heated PCV intake manifold fitting
7	18465	Heated PCV coolant hose
8	9S455	Intake manifold assembly
9	18663	Heater outlet tube assembly
10	18D283	Auxiliary heater core assembly
11	6083	LH cylinder head gasket
12	6049	LH cylinder head
13	8A080	Degas bottle
14	6010	Cylinder block
15	6881	Oil filter adapter
16	6A642	Oil cooler assembly
17	6049	RH cylinder head
18	8501	Coolant pump
19	8B273	Lower radiator hose assembly
20	8005	Radiator
21	8C369	Coolant crossover manifold assembly
22	8B274	Upper radiator hose
23	18C266	Heater return hose assembly
24	18C266	Heater supply hose assembly

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 2: Coolant Flow Diagram, 4.6L (2V) without Auxiliary Heat

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	18C266	Heater supply hose assembly
2	18C266	Heater return hose assembly
3	18476	Heater core assembly
4	18465	Heated PCV coolant hose
5	8594	Thermostat housing
6	8575	Thermostat
7	9A474	Heated PCV intake manifold fitting
8	18465	Heated PCV coolant hose
9	9S455	Intake manifold assembly
10	18663	Heater outlet tube assembly
11	6083	LH cylinder head gasket
12	6049	LH cylinder head
13	8A080	Degas bottle
14	6010	Cylinder block
15	6881	Oil filter adapter
16	6A642	Oil cooler assembly
17	6049	RH cylinder head
18	8501	Coolant pump
19	8B273	Lower radiator hose assembly
20	8005	Radiator
21	8C369	Coolant crossover manifold assembly
22	8B274	Upper radiator hose

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 3: Coolant Flow Diagram, 5.4L (2V) with Auxiliary Heat

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	8005	Radiator
2	18478	Heater assembly
3	8B274	Upper radiator hose
4	18C266	Heater supply hose assembly
5	18C266	Heater return hose assembly
6	8594	Thermostat housing
7	18663	Heater outlet tube
8	6049	LH cylinder head
9	6083	LH cylinder head gasket
10	6015	Cylinder block
11	6A642	Oil cooler assembly
12	6881	Oil filter adapter
13	8501	Coolant pump
14	6049	RH cylinder head
15	8A080	Degas bottle
16	8C369	Coolant crossover manifold assembly
17	9424	Intake manifold assembly
18	8B273	Lower radiator hose assembly

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 4: Coolant Flow Diagram, 5.4L (2V) without Heated Throttle Body (TB)

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	8005	Radiator
2	18478	Heater assembly
3	8B274	Upper radiator hose
4	18C266	Heater supply hose assembly
5	18C266	Heater return hose assembly
6	8594	Thermostat housing
7	18D283	Auxiliary heater and A/C assembly
8	18K470	A/C and heater tube assembly
9	6049	LH cylinder head
10	6083	LH cylinder head gasket
11	6010	Cylinder block
12	18663	Heater outlet tube
13	6A642	Oil cooler assembly
14	8501	Coolant pump
15	6049	RH cylinder head
16	6881	Oil filter adapter
17	8A080	Degas bottle
18	9424	Intake manifold assembly
19	8C369	Coolant crossover manifold assembly
20	8B273	Lower radiator hose assembly

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 5: Coolant Flow Diagram, 6.8L (2V) with Auxiliary Heat

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	8005	Radiator
2	8B274	Upper radiator hose
3	18478	Heater assembly
4	18C266	Heater return hose assembly
5	18C266	Heater supply hose assembly
6	8594	Thermostat housing
7	9E822	Throttle body (TB) and spacer assembly
8	18663	Heater outlet tube
9	18K470	A/C and heater tube assembly
10	18D283	Auxiliary heater and A/C assembly
11	6049	LH cylinder head
12	6083	LH cylinder head gasket
13	6A642	Oil cooler assembly
14	6010	Cylinder block
15	6881	Oil filter adapter
16	8501	Coolant pump
17	6049	RH cylinder head
18	8A080	Degas bottle
19	9C663	Intake manifold assembly
20	8B273	Lower radiator hose assembly

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 6: Coolant Flow Diagram, 6.8L (2V) without Auxiliary Heat

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	8005	Radiator
2	8B274	Upper radiator hose
3	18C266	Heater supply hose assembly
4	8594	Thermostat housing
5	9E822	Throttle body (TB) and spacer assembly
6	18C266	Heater return hose assembly
7	18663	Heater outlet tube
8	18478	Heater assembly
9	6049	LH cylinder head
10	6083	LH cylinder head gasket
11	6010	Cylinder block
12	6A642	Oil cooler assembly
13	6881	Oil filter adapter
14	8501	Coolant pump
15	6049	RH cylinder head
16	8A080	Degas bottle
17	9C663	Intake manifold assembly
18	8B273	Lower radiator hose assembly

NOTE: Black arrows indicate hot, white arrows indicate cold.

Fig 7: Coolant Flow Diagram, 6.0L Diesel

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	18476	Heater core assembly
2	18C266	Heater supply hose assembly
3	1840603C93	Heater feed tube assembly
4	1843723C91	Coolant temperature sender
5	1839304C92	Thermostat housing
6	8810-08A	RH cylinder head
7	1845074C2	Intake manifold
8	1845853C91	Deaeration hose elbow fitting
9	1844085C5	Exhaust gas recirculation (EGR) cooler
10	8810-13C	Oil cooler assembly
11	8810-08A	LH cylinder head
12	18D283	Auxiliary heater core
13	18K470	Auxiliary heater coolant tubes
14	8810-06A	Crankcase assembly
15	1836556C1	Front cover gasket
16	8B273	Lower radiator hose
17	1844638C1	Engine front cover
18	1843723C91	Coolant pump
19	8A080	Degas bottle
20	8C351	Engine fill hose
21	8005	Radiator
22	8B274	Upper radiator hose
23	8W005	Degas bottle inlet coolant hose
24	18C266	Heater return hose assembly