See also:

Changing engine coolant
Major cooling system repairs should be performed by an INFINITI retailer. The service procedures can be found in the appropriate INFINITI Service Manual. Improper servicing can result in reduced heat ...

Engine block heater (if so equipped)
Engine block heaters are used to assist in cold temperature starting. The engine block heater should be used when the outside temperature is 208F (−78C) or lower. To use the engine bloc ...

Spark plugs
WARNING Be sure the engine and the ignition switch are off and that the parking brake is engaged securely. CAUTION Be sure to use the correct socket to remove the spark plugs. An incorre ...