Ignition Coil - Removal

4.7L V-8





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




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