Component Tests and General Diagnostics

1. Turn the engine OFF.
2. Check engine coolant for dirty or rusty appearance. Replace dirty or rusty coolant to protect the cooling system from corrosion damage. Replace the coolant or recycle using Rotunda Coolant Recycler 181-00003 or equivalent.

If coolant condition is satisfactory, check coolant concentration for proper protection level. Use Rotunda Battery and AntiFreeze Tester 01 4-R 1060 or equivalent or a hydrometer for testing. Maintain a protection level of at least -30°C (-20°F) to preserve anti-rust corrosion protection and ensure proper engine operating temperature.

If concentration level is low, partially drain the cooling system by opening the radiator draincock or by partially removing the lower radiator hose. Secure the radiator draincock or hose clamp and add 100 percent concentration of Premium Cooling System Fluid E2FZ-19549-AA or B in Oregon F5FZ-19549-CC, in Canada, CXC-8-B, Recycled Coolant, or equivalent that meets Ford specification ESE-M97B44-A to obtain the recommended protection level. Wet the rubber sealing surface of the pressure relief cap before installing the pressure relief cap tightly on degas bottle.

WARNING: NEVER REMOVE THE PRESSURE RELIEF CAP UNDER ANY CONDITIONS WHILE THE ENGINE IS OPERATING. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN DAMAGE TO THE COOLING SYSTEM OR ENGINE AND/OR PERSONAL INJURY. TO AVOID HAVING SCALDING HOT COOLANT OR STEAM BLOW OUT OF THE COOLING SYSTEM OR DEGAS BOTTLE, USE EXTREME CARE WHEN REMOVING THE PRESSURE RELIEF CAP FROM A HOT COOLING SYSTEM OR DEGAS BOTTLE. WAIT UNTIL THE ENGINE HAS COOLED, THEN WRAP A THICK CLOTH AROUND THE PRESSURE RELIEF CAP AND TURN IT SLOWLY UNTIL THE PRESSURE BEGINS TO RELEASE. STEP BACK WHILE THE PRESSURE IS RELEASED FROM THE COOLING SYSTEM. WHEN CERTAIN ALL THE PRESSURE HAS BEEN RELEASED, (STILL WITH A CLOTH) TURN AND REMOVE PRESSURE RELIEF CAP.