Initial Inspection and Diagnostic Overview

Check engine coolant level in the degas bottle at least once a month.

With a cold engine, the engine coolant level must be maintained within the cold fill range.

If engine coolant level in the degas bottle is less than the above indicated levels, fill degas bottle with a 50/50 mixture of Premium Cooling System Fluid E2FZ-19549-AA or -B in Oregon, F5FZ-19549-CC, in Canada, CXC-8-B, Recycled Coolant, or equivalent meeting Ford specification ESE-M97B44-A to the specified levels.

In the event no coolant is observed in the degas bottle or when an engine coolant level change does not occur, check the system as follows:
1. With engine cold, remove pressure relief cap and inspect filler neck sealing gasket for foreign material between the gasket and cap diaphragm.
- Refer to Pressure Relief Cap Cleaning and Inspection. Pressure Test

- Rinse pressure relief cap in clean water.

The pressure relief cap used on this system is unique; replace only with proper pressure relief cap.

2. Remove radiator overflow hose at the radiator connection. Remove degas bottle hose from fender apron and flush with clean water.
3. Inspect radiator overflow hose for obstructions cracks or cuts. Replace if necessary.
4. Install radiator coolant recovery reservoir hose and degas bottle. Connect at radiator connection.
5. Replenish coolant in cooling system as required.





6. Install pressure relief cap.

A low engine coolant level in the radiator can cause poor heater and defroster performance. If this condition exists, perform the following:
a. With cold engine, remove pressure relief cap.
b. With 50/50 mixture of Premium Cooling System Fluid E2FZ-19549-AA or -B in Oregon, F5FZ-19549-CC, in Canada, CXC-8-B, Recycled Coolant, or equivalent meeting Ford specification ESE-M97B44-A and water, fill degas bottle to indicated level and replace pressure relief cap.
c. Start the engine and run until the water thermostat opens.
d. Observe the engine coolant level in the degas bottle. The minimum level should be as specified in Step B. If not, adjust engine coolant level by adding a 50/50 mixture of Premium Cooling System Fluid E2FZ-19549-AA in Oregon, F5FZ-19549-CC, in Canada, CXC-8-B, Recycled Coolant, or equivalent meeting Ford specification ESE-M97B44-A and water.
e. Check for leakage at the following:
- all hoses and hose connections
- radiator seams, radiator core and radiator draincock
- cylinder block core plug and drain plugs
- edges of all cooling system gaskets
- transmission oil cooler fittings
- vehicle heating system components
- water pump
- internal cylinder blocks and cylinder head passages

f. Examine oil level dipstick for evidence of engine coolant in engine oil.
g. Check radiator for evidence of transmission fluid in coolant (leakage at transmission oil cooler).

Install cooling system analyzer to assist in testing the engine cooling system. Follow the manufacturer's recommended connections and testing procedures.