2004 Nissan Xterra Owner's Manual - Page 225

SPARK PLUGS WARNING Be sure the engine and 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 incorrect socket can damage the spark plugs. WDI0288 WDI0005 VG33ER engine 1 2 3 4 5 6 7 Crankshaft Water pump Generator Air conditioner compressor Power steering pump Supercharger Idler : Tension checking points REPLACING SPARK PLUGS Platinum-tipped spark plugs It is not necessary to replace platinum-tipped spark plugs as frequently as conventional type spark plugs because they last much longer. Follow the maintenance schedule, but do not reuse the spark plugs by cleaning or regapping. ● Always replace spark plugs with recommended or equivalent ones. Maintenance and do-it-yourself 8-21