GENERAL SPECIFICATIONS
| Item | Specification |
|---|---|
| Silicone Brake Caliper Grease and Dielectric Compound D7AZ-19A331-A (Motorcraft XG-3) or equivalent | ESE-M1C171-A |
GENERAL SPECIFICATIONS
TORQUE SPECIFICATIONS
| Description | Nm |
|---|---|
| Ignition coil bolts | 7 |
| Spark plugs | 15 |
TORQUE SPECIFICATIONS
The electronic ignition (El) system for the 3.9L and the 4.2L engines consists of the following components
- crankshaft position (CKP) sensor
- ignition coil
- spark plugs
- spark plug wires
The crankshaft position (CKP) sensor
- is a variable reluctance sensor.
- is mounted on the engine front cover.
- is triggered by a 36-minus-l tooth trigger wheel located on the crankshaft pulley and damper.
- provides base timing and crankshaft speed (RPM) to the powertrain control module (PCM).
For additional information, refer to ELECTRONIC ENGINE CONTROLS . The ignition coil
- is controlled by the powertrain control module.
- fires 2 spark plugs simultaneously.
The spark plugs
- ignite the fuel and air mixture.
- are platinum enhanced for long life.
The spark plug wires
- carry high voltage pulses from the ignition coil to the spark plugs.
See INTRODUCTION - GASOLINE article.
Scheme 1
For additional information, refer to the removal and installation procedures.