Fig. 8: Ignition Coil Seal & O-Ring
Courtesy of CHRYSLER LLC
An individual ignition coil (1) is used for each spark plug. The coil fits into machined holes in the cylinder
head. A mounting stud/nut secures each coil to the top of the intake manifold. The bottom of the coil is
equipped with a rubber boot to seal the spark plug 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 spark plug. These rubber boots and springs are
a permanent part of the coil and are not serviced separately. An o-ring (2) is 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
2007 Dodge Nitro R/T
2007 ENGINE Ignition Control - Service Information - Nitro