RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Spark Plug: Service and Repair
Spark Plug Replacement
REMOVAL
Fig. 29 Heat Shields - 5.9L
On this engines, spark plug cable heat shields are pressed into the cylinder head to surround each cable boot and spark plug.
Fig. 30 Cable Removal - 5.9L
1. Always remove spark plug or ignition coil cables by grasping at the cable boot. Turn the cable boot 1/2 turn and pull straight back in a steady
motion. Never pull directly on the cable. Internal damage to cable will result.
2. Prior to removing the spark plug, spray compressed air around the spark plug hole and the area around the spark plug. This will help prevent
foreign material from entering the combustion chamber.
3. Remove the spark plug using a quality socket with a rubber or foam insert.
4. Inspect the spark plug condition. Refer to Spark Plug Condition in the Diagnostics and Testing section of this group.
INSTALLATION
Special care should be taken when installing spark plugs into the cylinder head spark plug wells. Be sure the plugs do not drop into the plug wells as
electrodes can be damaged.
Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the spark plug gap or a cracked
porcelain insulator.
