2012 Jeep Wrangler JK Factory Service Manual 08 - Electrical

COIL, Ignition, 3.8L

REMOVAL

REMOVAL


  1. Disconnect and isolate the negative battery cable.

    2.  
  2. Remove the engine cover (1).

    3.  
  3. If removing the ignition coils from cylinders 2, 4 or 6 on the LH side of the engine, first remove the upper intake manifold (2) and insulator (Refer to 09 - Engine/Manifolds/MANIFOLD, Intake - Removal) .

    NOTE:

    The LH ignition coils are shown, the RH ignition coils are similar.


    4.  
  4. Unlock and disconnect the electrical connector (1) from the ignition coil.

    5.  
  5. Remove the ignition coil mounting bolt (3).

    6.  
  6. Pull the ignition coil (2) from cylinder head cover opening with a slight twisting action.

    7.  

INSTALLATION

INSTALLATION

  1. Using compressed air, blow out any dirt or contaminants from around the top of spark plug.

    2.  
  2. Check the condition of the ignition coil rubber boot (1). Inspect the opening of the boot (2) for any debris, tears or rips. Carefully remove any debris with a lint free cloth.

    CAUTION:

    Do not apply a silicone based grease such as Mopar® Dielectric Grease to the ignition coil rubber boot. The silicone based grease will absorb into the boot causing it to stick and tear.


    3.  
  3. Place a small, 360° bead of Fluostar 2LF lubricant (1) along the inside opening of the coil boot approximately 1 to 2 mm from the chamfer edge but not on the chamfered surface.



    NOTE:

    The LH ignition coils are shown, the RH ignition coils are similar.


    4.  
  4. Position the ignition coil (2) into the cylinder head cover opening. Using a twisting action, push the ignition coil onto the spark plug.

    5.  
  5. Install the ignition coil mounting bolt (3) and tighten to 8 N·m (71 in.lbs).

    6.  
  6. Connect and lock the electrical connector (1) to the ignition coil (2).

    7.  
  7. If removed, install the insulator, upper intake manifold (1) and air cleaner body (Refer to 09 - Engine/Manifolds/MANIFOLD, Intake - Installation) .

    8.  
  8. Install the engine cover (1).

    9.  
  9. Connect the negative battery cable and tighten nut to 5 N·m (45 in. lbs.).

    10.