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Home >> Nissan-Datsun >> 2011 >> Sentra S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Cooling System (Qr25DE)) >> Service Information >> Engine Coolant >> Changing Engine Coolant >> Draining Engine Coolant

Draining Engine Coolant

WARNING: This page is about a different variant/trim than selected.
  1. Remove the engine under cover. Refer to "REMOVAL AND INSTALLATION ".
  2. Open the radiator drain plug (1) at the bottom of the radiator, and remove the radiator filler cap. This is the only step required when partially draining the cooling system (radiator only).
    • Front
      CAUTION:
      • Perform this step when engine is cold.
      • Do not spill engine coolant on drive belt.
        Fig 1: Location Of Radiator Drain Plug
        G04928785Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Follow this step for heater core removal/replacement only. Disconnect the upper heater hose at the engine side and apply moderate air pressure [103.46 kPa (15 psi, 1.055 kg/cm2 ) maximum air pressure] into the hose for 30 seconds to blow the excess coolant out of the heater core.
  4. When draining all of the coolant in the system, remove the reservoir tank and drain the coolant, then clean the reservoir tank before installation.
    CAUTION: Do not allow the coolant to contact drive belt.
  5. When draining all of the coolant in the system for engine removal or repair, open the drain plug on the cylinder block.
    Fig 2: Location Of Drain Plug On Cylinder Block
    G04894352Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Check the drained engine coolant for contaminants such as rust, corrosion or discoloration. If the coolant is contaminated, flush the engine cooling system. Follow the "FLUSHING COOLING SYSTEM" procedure.
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