Spark Plug

REMOVAL 

1. Remove the ignition coil. Refer to COIL, IGNITION, REMOVAL AND INSTALLATION .
2. Prior to removing the spark plug, spray compressed air into the cylinder head opening. This will help prevent foreign material from entering the combustion chamber.
   CAUTION:

   The spark plug tubes (1) are a thin wall design. Avoid damaging the spark plug tubes. Damage to the spark plug tube can result in oil leaks.

   Courtesy of CHRYSLER GROUP, LLC

   1 - Spark Plug Tube

3. Remove the spark plug from the cylinder head using a quality thin wall socket with a rubber or foam insert.
   CAUTION:

   Cleaning platinum plugs may damage the platinum center electrode or the thin platinum pad.

4. Inspect the spark plug condition.

INSTALLATION 

Follow the removal procedure in reverse for general reassembly of the components on the vehicle. The steps listed below are calling out specific procedures that should be followed during installation.

• Check and adjust the spark plug gap with a gap gauging tool. Refer to TECHNICAL SPECIFICATIONS .
  CAUTION:

  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.

• Start the spark plug into the cylinder head by hand to avoid cross threading.
  CAUTION:

  Spark plug torque is critical and must not exceed the specified value. Overtightening stretches the spark plug shell reducing its heat transfer capability resulting in possible catastrophic engine failure.

  Courtesy of CHRYSLER GROUP, LLC

  1 - Gap Gauging Tool

  2 - Spark Plug

• Tighten the spark plugs to the proper torque specifications. Refer to TORQUE SPECIFICATIONS .