1.Install reservoir tank if removed, and radiator drain plug.
    ■ CAUTION ■
    Be sure to clean drain plug and install with new O-ring.

    Tightening torque
    : Refer to Exploded View (GT-R certified NISSAN dealer).

    If water drain plugs on cylinder block are removed, close and tighten them. Refer to Disassembly and Assembly (GT-R certified NISSAN dealer).
    2.Fill radiator and reservoir tank with water.
    3.Run the engine and warm it up to normal operating temperature.
    4.Rev the engine two or three times under no-load.
    5.Stop the engine and wait until it cools down.
    6.Drain water from the system. Refer to Draining.
    7.Repeat steps 1 through 6 until clear water begins to drain from radiator.