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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1694 (Maintenance) >> Engine Maintenance >> Changing Engine Coolant >> Draining Engine Coolant

Draining Engine Coolant

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest temperature position. Wait 10 seconds and turn ignition switch OFF.
  2. Remove the engine front undercover using power tool.
  3. Open the radiator drain plug at the bottom of the radiator, and remove the reservoir cap. This is the only step required when partially draining the cooling system (radiator only).
    CAUTION: Do not to allow the coolant to contaminate the drive belts.
    Fig 1: Identifying Radiator Drain Plug
    G04177956Courtesy of NISSAN MOTOR CO., U.S.A.
  4. When draining all of the coolant in the system for engine removal or repair, it is necessary to drain the cylinder block. Remove the water drain plugs (A, B, C, D), and block heater (D) if equipped, to drain the cylinder block as shown.
    NOTE: For Canada, the water drain plug (D) as shown, is not a water drain plug but a block heater.
  5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
  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 "

    Fig 2: Locating Engine Block Drain Plugs And Block Heater
    G04146961Courtesy of NISSAN MOTOR CO., U.S.A.
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