Trooper LTD 4WD V6-3.5L (2002)
Spark Plug: Service and Repair
Removal and Installation
Electronic Ignition System
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Disconnect the ignition coil connector at the ignition coil assemblies.
3. Remove the two screws that secure the ignition coil assemblies to the rocker cover.
4. Remove the ignition coil assemblies and the spark plug boot from the spark plug.
Twist the ignition coil assemblies while pulling it straight up.
5. Use the appropriate spark plug socket in order to remove the spark plug from the engine.
INSTALLATION PROCEDURE
NOTE: The plug must thread smoothly into the cylinder head and be fully seated. Use a thread chaser if necessary to clean the threads in the cylinder
head. Cross-threading or failure to fully seat the spark plug can cause plug overheating, exhaust blow-by gases, or thread damage. Do not
overtighten the spark plugs. Over tightening can cause aluminum threads to strip.
1. Install the spark plug in the engine. Use the appropriate spark plug socket.
Tighten the spark plug to ............................................................................................................................................................... 18 N.m (13 lb ft.).
