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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Engine Cooling System (Gas)) >> Diagnosis And Testing >> Engine Cooling >> Pinpoint Tests >> Pinpoint Test A: Loss of Coolant >> Pinpoint Test A: Loss Of Coolant

Pinpoint Test A: Loss Of Coolant

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
  1. A1 CARRY OUT INSPECTION AND VERIFICATION 
    • Yes  : REPAIR as needed. TEST the system for normal operation.
    • No  : GO to A2.
  2. A2 CHECK THE ENGINE COOLANT LEVEL 
    NOTE: Allow the engine to cool before checking the engine coolant level.
    • Ignition OFF.
    • Visually inspect the engine coolant level at the degas bottle.
    • Is the engine coolant level within specifications? 
    • Yes  : GO to A3.
    • No  : ADJUST the engine coolant level as necessary. GO to A3.
  3. A3 PRESSURE TEST THE ENGINE COOLING SYSTEM 
    • Yes  : REPAIR or INSTALL new components. TEST the system for normal operation.
    • No  : GO to A4.
  4. A4 CHECK THE ENGINE COOLANT FOR AN INTERNAL LEAK 
    • Inspect the engine coolant in the degas bottle for signs of engine oil or transmission fluid.
    • Is engine oil or transmission fluid evident in the coolant? 
    • Yes  : If engine oil is evident, GO to ENGINE SYSTEM - GENERAL INFORMATION for engine diagnosis. If transmission fluid is evident, INSTALL a new radiator. REPAIR the transmission as necessary. Refer to the appropriate article for the procedure. TEST the system for normal operation.
    • No  : GO to A5.
  5. A5 CHECK THE ENGINE OIL AND TRANSMISSION FLUID FOR COOLANT 
    • Remove the oil level indicators from the engine and the transmission.
    • Is coolant evident in the oil or transmission fluid? 
    • Yes  : If coolant is in the engine oil, GO to ENGINE SYSTEM - GENERAL INFORMATION . If coolant is in the transmission fluid, INSTALL a new radiator. REPAIR the transmission as necessary. Refer to the appropriate article for the procedure.
    • No  : GO to A6.
  6. A6 CHECK THE COOLING SYSTEM FOR COMBUSTION GASES 
    • NOTE: Use UView® Combustion Leak Tester part number UVU560000-R or equivalent.

      Using a cooling system combustion gas leak tester, following the instructions supplied with the tester, check the coolant for combustion gases.

    • Are combustion gases present? 
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