WARNING: DO NOT REMOVE THE COIL MOUNTING
BRACKET-TO-CYLINDER HEAD MOUNTING BOLTS.
THE COIL MOUNTING BRACKET IS UNDER ACCES-
SORY DRIVE BELT TENSION. IF THIS BRACKET IS
TO BE REMOVED FOR ANY REASON, ALL BELT
TENSION MUST FIRST BE RELIEVED. REFER TO
THE BELT SECTION OF GROUP 7, COOLING SYS-
TEM.
(3) Remove ignition coil from coil mounting
bracket (two bolts).
INSTALLATION
(1) Install the ignition coil to coil bracket. If nuts
and bolts are used to secure coil to coil bracket,
tighten to 11 N·m (100 in. lbs.) torque. If the coil
mounting bracket has been tapped for coil mounting
bolts, tighten bolts to 5 N·m (50 in. lbs.) torque.
(2) Connect all wiring to ignition coil.
IGNITION COIL—4.7L ENGINE
REMOVAL
An individual ignition coil is used for each spark
plug (Fig. 25). The coil fits into machined holes in the
cylinder head. A mounting stud/nut secures each coil
to the top of the intake manifold (Fig. 26). The bot-
tom 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 (Fig.
25) is used to seal the coil at the opening into the cyl-
inder 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 (Fig. 26) from
coil by pushing downward on release lock on top of
connector and pull connector from coil.
(3) Clean area at base of coil with compressed air
before removal.
(4) Remove coil mounting nut from mounting stud
(Fig. 26).
(5) Carefully pull up coil from cylinder head open-
ing with a slight twisting action.
(6) Remove coil from vehicle.
INSTALLATION
(1) Using compressed air, blow out any dirt or con-
taminants from around top of spark plug.
(2) Check condition of coil o-ring and replace as
necessary. To aid in coil installation, apply silicone to
coil o-ring.
(3) Position ignition coil into cylinder head opening
and push onto spark plug. Do this while guiding coil
base over mounting stud.
(4) Install mounting stud nut and tighten to 8 N·m
(70 in. lbs.) torque.
(5) Connect electrical connector to coil by snapping
into position.
(6) If necessary, install throttle body air tube or
box.
Fig. 24 Ignition Coil—3.9L V-6 or 5.2/5.9L V-8
Engines
1 – ACCESSORY DRIVE BELT TENSIONER
2 – COIL CONNECTOR
3 – IGNITION COIL
4 – COIL MOUNTING BOLTS
Fig. 25 Ignition Coil—4.7L V–8 Engine
1 – O-RING
2 – IGNITION COIL
3 – ELECTRICAL CONNECTOR
DN IGNITION SYSTEM 8D - 13
REMOVAL AND INSTALLATION (Continued)
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