Ignition Coil - Removal

4.7L





An individual ignition coil (1) is used for each pair of spark plugs. Each coil attaches directly to the top of the eight upper bank of spark plugs. Secondary cables (3) connect each coil to the eight lower bank of spark plugs. The coils themselves fit into machined holes in the cylinder head. Each coil also has its own individual electrical connector (2).





NOTE: The bolt used to mount the ignition coil assembly is the same bolt used to mount the intake manifold. If replacing either one or all eight coils, check and re-torque all eight bolts.

A mounting bolt (3) secures each coil assembly to the top of the intake manifold. The bottom of the coil assembly is equipped with a rubber boot (4) to seal the spark plug (5) to the coil. Inside each rubber boot is a spring. The spring is used for a mechanical contact between the coil and the top of the upper bank of spark plugs. These rubber boots and springs are a permanent part of the coil assembly and are not serviced separately. The rubber boot (4) is also used to seal the coil at the opening into the cylinder head.





1. Depending on which coil assembly is being removed, the throttle body air intake tube or intake box may need to be removed, to gain access to the coil.
2. Disconnect the electrical connector (2) from the coil assembly by pushing downward on the release lock on the top of the connector and pull connector from the coil.
3. Disconnect the secondary cable (3) at the coil assembly.





4. Clean the area at the base of the coil assembly with compressed air before removal.
5. Remove the coil assembly mounting bolt (3).
6. Carefully pull up the coil assembly (2) from the cylinder head opening with a slight twisting action. This helps to disengage the rubber boot (4) from the spark plug (5).
7. Remove the coil assembly from the engine.