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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 468 (Engine Cooling System (4.0L)) >> Periodic Maintenance >> Engine Coolant >> Changing Engine Coolant >> Draining Engine Coolant

Draining Engine Coolant

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. 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 front under cover. Refer to Removal and Installation .
  3. Open the radiator drain plug (A) at the bottom of the radiator, and remove the reservoir cap. This is the only step required when partially draining the cooling system.
    G08161035Courtesy of NISSAN NORTH AMERICA, INC.
    CAUTION: Do not allow the coolant to contact the drive belts.
  4. If it is necessary to drain the cylinder block when draining all of the coolant in the system, complete the remaining steps.
    1. Remove the front under cover using power tool. Refer to Removal and Installation .
    2. Drain the cylinder block by removing the cylinder block drain plugs (A), (B), (C), (D) as shown below and coolant heater (if equipped).
      G04146961Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Do not reuse the copper sealing washers.
      NOTE: For Canada, the drain plug (D) is replaced with 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. Follow the "Flushing Cooling System" procedure.

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