Xterra XE 4WD V6-3.3L SC (VG33ER) (2002)
Coolant: Service Precautions
WARNING: To avoid being scalded, never change the coolant when the engine is hot.
Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn to release built-up pressure.
Then turn the cap all the way.
CAUTION: Do not open the radiator cap while changing engine coolant. Fill the radiator only from the filler cap above the radiator upper hose with
radiator cap closed.