Disassembly Procedure
Notice: The ignition system distributor driven gear and rotor may be installed
in multiple positions. In order to avoid mistakes, mark the distributor on
the following components in order to ensure the same mounting position upon
reassembly:
• | The distributor driven gear |
Installing the driven gear 180 degrees out of alignment, or locating
the rotor in the wrong holes, will cause a no-start condition. Premature
engine wear or damage may result.
- Remove the two screws
that hold the distributor cap to the housing.
- Discard the screws.
- Remove the distributor cap from the housing.
- Align white paint mark
on the bottom stem of the distributor, and the pre-drilled indent hole in
the bottom of the gear (3).
- With the gear in this position, the rotor segment should be positioned
as shown for a V6 engine (1) or V8 engine (2)
If not, replace the distributor.
- Remove the two screws
from the rotor.
- Remove the rotor.
- Note the locating holes
that the rotor was removed from:
• | The rotor screw holes (1) |
• | The rotor locator pin holes (2) |
- Remove the two screws
that hold the camshaft position (CMP) sensor.
- Discard the screws.
- Line up the square-cut
hole in the vane wheel with the CMP sensor.
- Remove the CMP sensor.
- Note the dimple located below the roll pin hole on one side of
the gear. The dimple will be used to properly orient the gear onto the shaft
during reassembly.
Caution: Wear safety glasses in order to avoid eye damage.
- Support
the distributor drive gear in a V-block or similar fixture.
- Drive out the roll pin with a suitable punch.
- Remove the driven gear
from the distributor shaft.
- Remove the round washer.
- Remove the tang washer.
- Remove the round washer (1), if equipped, 7.4L engine
only.
- Remove the old oil seal.
Assembly Procedure
- Line up the square-cut
hole in the vane wheel for the camshaft position (CMP) sensor.
- Insert the sensor into
the housing.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install two NEW
screws for the camshaft position (CMP) sensor.
Tighten
Tighten the screws to 2.2 N·m (20 lb in).
- Identify the correct rotor
mounting position:
• | At the rotor screw holes (1) |
• | At the rotor locator pin holes (2) |
- Install the distributor
rotor according to the index marks.
- Install two rotor hold down screws.
Tighten
Tighten the screws to 1.9 N·m (17 lb in).
Notice: The ignition system distributor driven gear and rotor may be installed
in multiple positions. In order to avoid mistakes, mark the distributor on
the following components in order to ensure the same mounting position upon
reassembly:
• | The distributor driven gear |
Installing the driven gear 180 degrees out of alignment, or locating
the rotor in the wrong holes, will cause a no-start condition. Premature
engine wear or damage may result.
- Install the round washer (1), 7.4L engine only.
- Install the tang washer over the bottom of the distributor shaft.
- Install the round washer.
- Install the driven gear according to the index marks.
- Align the rotor segment
as shown for a V6 engine (1) or V8 engine (2).
- Install the gear and align white paint mark on the bottom stem
of the distributor, and the pre-drilled indent hole in the bottom of the
gear (3).
- Check to see If the driven gear is installed incorrectly, the
dimple will be approximately 180 degrees opposite the rotor segment
when it is installed in the distributor.
Caution: Wear safety glasses in order to avoid eye damage.
- Support
the distributor drive gear in a V-block or similar fixture.
- Install the roll pin with a suitable punch and hammer in order
to hold the driven gear in the correct position.
- Install the distributor
cap.
- Install two NEW distributor cap screws.
Tighten
Tighten the screws to 2.4 N·m (21 lb in).
- Install the new oil seal
under the mounting flange of the distributor base.