2006 Nissan Sentra Owner's Manual - Page 190

SPARK PLUGS REPLACING SPARK PLUGS WARNING Be sure the engine and ignition switch are off and that the parking brake is engaged securely. 3. Disconnect the ignition coils from the spark plugs. 4. Remove the spark plugs with a spark plug socket. The plug socket has a rubber seal that holds the spark plug so it does not fall when it is pulled out. Make sure each spark plug is snugly fitted into the spark plug socket. 5. Fit the new plugs, one at a time, into the spark plug socket and install them. Use only the specified spark plugs. Turn each plug several full turns by hand, then tighten with the spark plug socket to the correct torque. Do not overtighten. Spark plug tightening torque: 14 - 22 ft-lb (20 - 29 N·m) 6. Holding the boot, reconnect each high tension cable/ignition coil to its proper spark plug by pushing it on until you feel a snap. 7. Install the ignition coil bolts. Ignition coil bolt tightening torque: 33 - 44 in-lb (3.8 - 5.0 N·m) Connect the ignition coil connector. 8. Install the engine cover (QR25DE engine). CAUTION Be sure to use the correct socket to remove the spark plugs. An incorrect socket can damage the spark plugs. WDI0005 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 log shown in the "NISSAN Service and Maintenance Guide". Do not service platinum-tipped 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