Xterra SE 2WD V6-3.3L (VG33E) (2002)
11. Warm up engine, and check for sound of coolant flow while running engine from idle up to 3,000 rpm with heater temperature control set at
several positions between cold and hot.
Sound may be noticeable at heater water cock.
12. If sound is heard, bleed air from cooling system by repeating steps 5 through 8 until coolant level no longer drops.
Clean excess coolant from engine.