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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1719 (Engine Cooling System (Except Hybrid)) >> 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 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. 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 
    • Carry out the INSPECTION AND VERIFICATION  procedure in this service information.
    • Were any concerns found? 
      • 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 
    • Pressure test the engine cooling system. Refer to COMPONENT TESTS , COOLING SYSTEM PRESSURE TEST  in this service information.
    • Does the engine cooling system leak externally?
      • 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.
    • Is engine oil evident in the coolant? 
  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 article. If coolant is in the transmission fluid, INSTALL a new radiator. REPAIR the transmission as necessary. Refer to appropriate Automatic Transmission article(s) for procedure(s).
      • No  : GO to A6.
  6. A6 CHECK THE COOLING SYSTEM FOR COMBUSTION GASES 
      NOTE: Use UView® Combustion Leak Tester, part No. 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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