Chrysler RAM TRUCK 2500 1994 Service Manual page 387

8D - 31 IGNITION SYSTEMS
•
DISTRIBUTOR J9314-81
Fig. 14 Rotor Alignment Mark
Fig. 15 Distributor Holddown Clamp
INSTALLATION
I f engine has been cranked while distributor is re­
moved, establish the relationship between distributor
shaft and number one piston position as follows:
Rotate crankshaft i n a clockwise .direction, as
viewed from front, until number one cylinder piston
is at top of compression stroke (compression should
be felt on finger with number one spark plug re­
moved). Then continue to slowly rotate engine clock­
wise until indicating mark (Fig. 9) is aligned to 0
degree (TDC) mark on timing chain cover.
(1) Clean top of cylinder block for a good seal be­
tween distributor base and block.
(2) Lightly oil the rubber O-ring seal on the dis­
tributor housing.
(3) Install rotor to distributor shaft.
(4) Position distributor into engine to its original
position. Engage tongue of distributor shaft with slot
in distributor oil pump drive gear. Position rotor to
the number one spark plug cable position.
(5) Install distributor holddown clamp and clamp
bolt. Do not tighten bolt at this time.
(6) Rotate the distributor housing until rotor is
aligned to CYL. NO. 1 alignment mark on the cam­
shaft position sensor (Fig. 14).
(7) Tighten clamp holddown bolt (Fig. 15) to 22.5
N-m (200 in. lbs.) torque.
(8) Connect camshaft position sensor wiring har­
ness to main engine harness.
(9) Install distributor cap. Tighten mounting
screws.
(10) Install all spark plug cables i n correct firing
order to distributor cap. Refer to the Specifications
section at the end of this group for spark plug cable
order. Be sure all spark plug cables are firmly con­
nected into distributor cap towers.
(11) Install air cleaner assembly and connecting
tubes.
(12) Connect negative battery cable to battery.
IGNITION COIL—3.9L V-6 OR 5.2/5.9L V-8
ENGINES
The ignition coil is an epoxy filled type. I f the coil
is replaced, i t must be replaced with the same type.
REMOVAL
3.9L V-6 or 5.2/5.9L V-8 LDC-Gas Engines: The coil
is mounted to a bracket that is bolted to the front of
the right engine cylinder head (Fig. 16). This bracket
is mounted on top of the automatic belt tensioner
bracket using common bolts.
5.9L V-8 HDC-Gas Engine: The coil is mounted to a
bracket that is bolted to the air injection pump (AIR
pump) mounting bracket (Fig. 17).
Fig. 16 Ignition Coil—3.9L V-6 or 5.2/5.9L V-8
LDC-Gas Engines
(1) Disconnect the primary wiring from the igni­
tion coil (Figs. 16 or 17).
(2) Disconnect the secondary spark plug cable from
the ignition coil (Figs. 16 or 17).