Nissan Altima (L32) 2007-2012 Service Manual ≻ Engine cooling system QR25DE ≻ Function diagnosis ≻ Overheating cause analysis Nissan Altima (L32) 2007-2012 Service Manual: Overheating cause analysis Troubleshooting Chart Cooling system Cooling Circuit 1. Thermostat 2. Water control valve 3. Water control valve housing (Water outlet) 4. Cylinder block (Thermostat housing) 5. Water inlet 6. Radiator 7. Water pump 8. Cylinder ... On-vehicle maintenance ENGINE COOLANT System Inspection • Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure fluid escaping from the radiator. • Wrap a thick clot ...