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Home >> Nissan-Datsun >> 2008 >> Sentra SL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Cooling System (Qr25DE)) >> Engine Coolant >> Changing Engine Coolant >> Draining Engine Coolant

Draining Engine Coolant

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  1. Remove the engine undercover using power tool.
  2. Open the radiator drain plug 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).
    • Do not to allow the coolant to contact the drive belts.
  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.
  5. When draining all of the coolant in the system for engine removal or repair, open the drain plug on the cylinder block.
    Fig 1: Identifying Drain Plug On Cylinder Block
    G04894352Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Check the drained coolant for contaminants such as rust, corrosion or discoloration. If the coolant is contaminated, flush the engine cooling system. Refer to "FLUSHING COOLING SYSTEM ".
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