Maxima V6-3.5L (VQ35DE) (2007)
Coolant: Service and Repair
Changing Engine Coolant
WARNING:
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To avoid being scalded, never change the coolant when the engine is hot.
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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.
DRAINING ENGINE COOLANT
1. Remove engine undercover, using power tools.
2. Open radiator drain plug at the bottom of radiator and remove the radiator filler cap. This is the only step required for a partial cooling system
drain.
3. If removing the heater core, remove the upper heater hose from the engine coolant outlet and apply moderate air pressure of 15 psi (103.46 kPa,
1.055 kg-cm2) maximum for 30 seconds into the hose to blow out excess coolant from the core.
4. For a complete cooling system drain, remove the reservoir tank and drain the coolant, and then clean the reservoir tank before installation.
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Do not allow coolant to spill on the drivebelts.
5. When performing a complete cooling system drain (to remove the engine or for engine repair), remove the cylinder block front drain plug and the
cylinder block RH drain plug.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.
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If contaminated, flush the engine cooling system.
REFILLING ENGINE COOLANT
1. Install the radiator drain plug. If the cooling system was drained completely, install the reservoir tank and the cylinder block drain plugs.
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The radiator must be completely empty of coolant and water.
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Apply sealant to the threads of the cylinder block drain plugs. Use Genuine High Performance Thread Sealant or equivalent.
Radiator drain plug: Refer to CO-13, Removal and Installation. See: Engine, Cooling and Exhaust/Cooling System/Radiator/Service and
Repair
Cylinder block front drain plug: Refer to EM-113, Removal and Installation.
Cylinder block RH drain plug: Refer to EM-113, Removal and Installation.
2. If disconnected, reattach the upper radiator hose at the engine side.
3. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with the engine OFF as necessary to activate
the heater mode.