1998 Nissan Pathfinder Owner's Manual - Page 191

AIR CLEANER cleans the air, it stops flame if the engine backfires. If it is not there, and the engine backfires, you could be burned. Do not drive with it off, and be careful working on the engine with the air cleaner off. ¼ Never pour fuel into the throttle body or attempt to start the engine with the air cleaner removed. Doing so could result in serious injury. DI0065 SDI0393 3. Check each new spark plug gap with a feeler gauge. Correct it as required. 4. Install spark plugs. When installing a plug, turn it in two or three turns by hand and then tighten with a spark plug wrench. Be careful not to overtighten it. Tightening torque: 14 to 22 ft-lb (20 to 29 N⋅m) 5. Reconnect the spark plug cables to their original positions. The filter element should not be cleaned and reused as it is given a special treatment. We recommended it be replaced according to the maintenance intervals. See "Periodic maintenance" in the "9. Maintenance" section for maintenance intervals. When replacing the filter, wipe the inside of the air cleaner housing and the cover with a damp cloth. ¼ Operating the engine with the air cleaner off can cause you or others to be burned. The air cleaner not only 8-16 Do-it-yourself