Description And Operation
DESCRIPTION
Cleaning platinum plugs may damage the platinum center electrode or the thin platinum pad.
| 1 - APPLY ANTI-SEIZE COMPOUND HERE ONLY |
| 2 - SPARK SURFACE |
The spark plugs are :
- mounted below each coil-on-plug assembly
- 2.9L uses Platinum/Nickel (dual precious metal) while the 2.0L plugs feature an iridium electrode.
- long-life service of 100, 000 miles
- accessed by: Refer to SPARK PLUG, REMOVAL AND INSTALLATION .
Do not use an ohm meter to check the resistance of the spark plugs. This will give an inaccurate reading.
- Maximum resistance: 7.5 K?
- Minimum resistance: 3 K?
A thin pad (2) is welded to both or just the center alloy electrode end(s). Extreme care must be used to prevent spark plug cross threading, incorrect gapping and ceramic insulator damage during plug removal and installation.
Mopar® Nickel-Graphite Anti-Seize compound is applied to the thread area (1) to prevent damage to the spark plug during removal and installation.
OPERATION
A spark plug delivers electric current from an ignition system coil to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.