1998 Nissan Frontier Owner's Manual - Page 162

SPARK PLUG REPLACEMENT Tightening torque: 14 to 22 ft-lb (20 to 29 N m) 5. Reconnect the spark plug cables to their original positions. DI1229M DI0065 WARNING Be sure the engine and ignition switch are off and that the parking brake is engaged securely. When disconnecting, always hold the boots - not the cables. Mark all cables to identify their original location. 2. Remove spark plugs with a spark plug socket. 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 two or three turns by hand and then tighten with a spark plug socket. Be careful not to overtighten it. Do-it-yourself CAUTION Be sure to use the correct socket to remove the plugs. An incorrect socket can cause damage. 1. Disconnect spark plug cables. Keep track of the original cable locations. 8-15