Spark Plug: Description and Operation

SPARK PLUG

DESCRIPTION

STANDARD 4 CYLINDER
All engines use resistor spark plugs. They have resistance values ranging from 6,000 to 20,000 ohms when checked with at least a 1000 volt spark plug tester.

Do not use an ohm meter to check the resistance of the spark plugs. This will give an inaccurate reading.

Refer to the Specifications for gap and type of spark plug.

PLATINUM PLUGS
The V6 engines use platinum resistor spark plugs. They have resistance values of 6,000 to 20,000 ohms when checked with at least a 1000 volt tester. For spark plug identification and specifications, Refer to the Specifications.

Do not use an ohm meter to check the resistance of the spark plugs. This will give an inaccurate reading.

Platinum Pads:

Setting Spark Plug Electrode Gap:

When the spark plug has a single or double platinum tip, the recommended service life for normal driving conditions per schedule A is 100,000 miles. The spark plugs have a recommended service life of 75,000 miles for severe driving conditions per schedule B. A thin platinum pad is welded to both or just the center electrode end(s) as shown. Extreme care must be used to prevent spark plug cross threading, mis-gapping and ceramic insulator damage during plug removal and installation.

CAUTION: Cleaning of the platinum plug may damage the platinum tip.