Dodge 2000 DURANGO Service Manual page 297

DN
DIAGNOSIS AND TESTING (Continued)
necessary, the steering column assembly must be
replaced. Refer to Group 19, Steering for procedures.
REMOVAL AND INSTALLATION
SPARK PLUG CABLES
CAUTION: When disconnecting a high voltage
cable from a spark plug or from the distributor cap,
twist the rubber boot slightly (1/2 turn) to break it
loose (Fig. 20). Grasp the boot (not the cable) and
pull it off with a steady, even force.
Fig. 20 Cable Removal
1 – SPARK PLUG CABLE AND BOOT
2 – SPARK PLUG BOOT PULLER
3 – TWIST AND PULL
4 – SPARK PLUG
Install cables into the proper engine cylinder firing
order (Fig. 21).
Fig. 21 Engine Firing Order—5.2/5.9L V-8 Engine
When replacing the spark plug and coil cables,
route the cables correctly and secure in the proper
retainers. Failure to route the cables properly can
cause the radio to reproduce ignition noise. It could
also cause cross ignition of the plugs or short circuit
the cables to ground.
When installing new cables, make sure a positive
connection is made. A snap should be felt when a
good connection is made between the plug cable and
the distributor cap tower.
SPARK PLUGS
REMOVAL
On 3.9L V-6 and 5.2/5.9L V-8 engines, spark plug
cable heat shields are pressed into the cylinder head
to surround each cable boot and spark plug (Fig. 22).
Fig. 22 Heat Shields—3.9/5.2/5.9L Engines
1 – AIR GAP
2 – SPARK PLUG BOOT HEAT SHIELD
If removal of the heat shield(s) is necessary,
remove the spark plug cable and compress the sides
of shield for removal. Each shield is slotted to allow
for compression and removal. To install the shields,
align shield to machined opening in cylinder head
and tap into place with a block of wood.
4.7L V–8 Engine: Each individual spark plug is
located under each ignition coil. Each individual igni-
tion coil must be removed to gain access to each
spark plug. Refer to Ignition Coil Removal/Installa-
tion.
(1) Except 4.7L Engine: Prior to removing spark
plug, spray compressed air around spark plug hole
and area around spark plug. This will help prevent
foreign material from entering combustion chamber.
(2) 4.7L V–8 Engine: Prior to removing spark plug,
spray compressed air around base of ignition coil at
cylinder head. This will help prevent foreign material
from entering combustion chamber.
IGNITION SYSTEM 8D - 11