2004 Nissan Sentra Owner's Manual - Page 184

SPARK PLUGS REPLACING 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. WDI0225 WDI0005 QR25DE engine 1. 2. 3. 4. 5. 6. Power steering fluid pump Water pump Generator A/C compressor (if so equipped) Crankshaft Auto tensioner 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. 1. Remove the engine cover (QR25DE engine). 2. Disconnect the ignition coil connectors. Remove the ignition coil bolts. 8-22 Maintenance and do-it-yourself