Draining Engine Coolant

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

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.
Remove the engine front undercover using power tool.
Open the radiator drain plug at the bottom of the radiator, and remove the radiator filler cap. This is the only step required when partially draining the cooling system (radiator only).
CAUTION: Do not to allow the coolant to contact the drive belts.

Fig 1: Removing Radiator Drain Plug
Courtesy of NISSAN MOTOR CO., U.S.A.
When draining all of the coolant in the system for engine removal or repair, it is necessary to drain the cylinder block. Remove the RH cylinder block drain plug to drain the right bank and the oil cooler hose to drain the left bank as shown.

Fig 2: Removing RH Cylinder Block Drain Plug
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Removing Oil Cooler Hose
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
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 ".